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Re:US regulators will certify first small nuclear reactor de... by titzer on Saturday July 30, 2022 @04:05PM (#32289810)
I've had friends that served on nuke subs. It still blows my mind that a sub only needs to refuel once every 15 years.

I never understood the argument nuclear power is so "dangerous". The US navy has fielded nuclear reactors in warzones since 1954 and no Chernobyl. Almost the entire fleet is nuclear-powered, including all aircraft carriers, subs, and battleships.

Re:US regulators will certify first small nuclear reactor de... by oceanplexian on Saturday July 30, 2022 @04:24PM (#32289960)
The fact is we could be doing a heck of a lot of cool things, if it weren’t for the anti-nuke crowd that set the technology back 20-30 years.

Imagine a world where economies of scale bring nuclear power down to the cost of fuel and maintenance. EVs would be a no brainer Natural gas would be obsolete. Nuclear desalination would completely solve the water crisis in the US West. I’m confident that with advances in material science we would figure out how to build safe nuclear aircraft and nuclear rockets, ushering in a new space age. Really the possibilities are incredible. It would be the equivalent of humanity going from horse and buggy to using fossil fuels, but another order of magnitude.

Re:US regulators will certify first small nuclear reactor de... by Melatonic on Saturday July 30, 2022 @06:37PM (#32291064)
The other problem is that the anti nuke crowd had a point back in the day - they were wrong about Nuclear not being safe theoretically - but they were right about a few asshole corporations doing things too cheaply.
Re:US regulators will certify first small nuclear reactor de... by parkingrift on Sunday July 31, 2022 @06:57AM (#32294741)
Instead we got decades of coal power which has caused at least tens of millions of deaths and has led to runaway global warming which might kill billions.

Truly glad we prevented a few assholes corporations from making a mess of things. I get grossed out just thinking about the clean air and normal climate.

Re:US regulators will certify first small nuclear reactor de... by gitanes on Saturday July 30, 2022 @09:39PM (#32292323)
Yeah, I hate that corporation called USSR blowing up Chernobyl.
Re:US regulators will certify first small nuclear reactor de... by baq on Sunday July 31, 2022 @02:22AM (#32293657)
they built too cheaply, ignored safety procedures and blew the thing up in the process.

it doesn't matter they were USSR. might as well have been PG&E. soviet people and usa people were both just people and still are.

Re:US regulators will certify first small nuclear reactor de... by phendrenad2 on Sunday July 31, 2022 @02:47AM (#32293768)
The anti-nuclear argument pretty much simplifies to: Nuclear is hard, maintenance needs to be done diligently and regularly, no corners can be cut, and humans are historically really bad to doing ANY of that!
Re:US regulators will certify first small nuclear reactor de... by Maursault on Saturday July 30, 2022 @05:32PM (#32290543)
> Imagine a world where economies of scale bring nuclear power down to the cost of fuel and maintenance.

Economies of scale were applied from the inception of commercial nuclear power, yet the promise of electricity too cheap to meter has never materialized. Quite the opposite. In fact, nuclear has always been the most expensive method of generating electricity, and the anti-nukes don't enter into it. Even if every individual on the planet was pro-nuke, it would still be too expensive. If it was otherwise, nothing whatsoever could prevent investors from coming out of the woodwork to fulfill your dream of nuclear power plants everywhere. Make nuclear energy economical and you can have all the nuclear power plants you want, as well as being absurdly wealthy. But when you fail, try to avoid blaming anything other than nuclear energy itself.

Re:US regulators will certify first small nuclear reactor de... by Godel_unicode on Saturday July 30, 2022 @06:06PM (#32290823)
None of this is true in Japan, you might want to read up about the cost scaling that’s happened there.

The short version is, you need to have enough generations of reactor building to allow later projects to benefit from previous learnings. Because of various outside effects (this is a euphemism for the anti-nuke lobby) that type of iterative improvement and workforce skilling didn’t happen in other countries.

Re:US regulators will certify first small nuclear reactor de... by Spooky23 on Saturday July 30, 2022 @07:36PM (#32291463)
The capital costs of nuclear are so high the current model of marketing electricity doesn’t work.

The same will be true of fusion. Set a target level of service and make electric generation a government service. The government is better at capital projects anyway and if energy were a taxpayer funded service it would transform society in many ways.

Re:US regulators will certify first small nuclear reactor de... by thrown_22 on Saturday July 30, 2022 @08:01PM (#32291640)
> The capital costs of nuclear are so high the current model of marketing electricity doesn’t work.

It doesn't work because nuclear is the only power where all the externalities are accounted for. The average coal plant kills more people with radiation released from burning coal every year than all nuclear accidents combined.

But because it's nicely diffuse no one cares.

Re:US regulators will certify first small nuclear reactor de... by VintageCool on Saturday July 30, 2022 @11:22PM (#32292851)
Coal is dying in the United States for economic reasons, anyway.
Re:US regulators will certify first small nuclear reactor de... by thrown_22 on Saturday July 30, 2022 @11:35PM (#32292913)
Yes, because natural gas is cheaper.

Amazing.

When people said we'd be using renewables I somehow didn't think dinosaur farts would be the largest slice of the pie.

Re:US regulators will certify first small nuclear reactor de... by scaredginger on Saturday July 30, 2022 @09:19PM (#32292185)
Sorry, what radiation is released from coal? Do you mean gas emissions?
Re:US regulators will certify first small nuclear reactor de... by SECProto on Saturday July 30, 2022 @09:27PM (#32292242)
Re:US regulators will certify first small nuclear reactor de... by scaredginger on Sunday July 31, 2022 @04:31AM (#32294217)
Thanks

The link you provided indicates the level of radiation is negligible, so I'm not sure what your point is.

Re:US regulators will certify first small nuclear reactor de... by danielheath on Sunday July 31, 2022 @08:56AM (#32295201)
It's higher (IIRC, orders of magnitude higher) than the amount of radiation released by an operating nuclear plant.
Re:US regulators will certify first small nuclear reactor de... by aperson_hello on Sunday July 31, 2022 @11:31AM (#32296222)
And that number includes all nuclear accidents as well iirc
Re:US regulators will certify first small nuclear reactor de... by tomohawk on Saturday July 30, 2022 @07:57PM (#32291609)
Can you name any capital projects in the last 30 years where the US government did a great job of a) controlling costs, b) meeting the stated design goal, c) on time?
Re:US regulators will certify first small nuclear reactor de... by pyuser583 on Saturday July 30, 2022 @08:38PM (#32291869)
I’m very happy with the massive road construction and maintenance in my area.
Re:US regulators will certify first small nuclear reactor de... by tomohawk on Sunday July 31, 2022 @06:27PM (#32299459)
I have a family member who was an engineer in the Federal Highway Administration for many years. The amount of waste and excess cost on these projects is really hard to exagerate.

Comparative costs to other OECD countries for similar infrastructure - there really isn't one, as the US is way out of line in terms of cost and quality.

My family member communicated with counterparts in other countries, impressed with what they were doing. When asked what the research was that they based their projects on, they all said it was the US funded research (which the US doesn't take advantage of).

Re:US regulators will certify first small nuclear reactor de... by pyuser583 on Sunday July 31, 2022 @10:38PM (#32301313)
The roads I’m talking about aren’t federal highways (“I-*”).

I’m sure the interstate highway system is the best the 1950s has to offer.

Re:US regulators will certify first small nuclear reactor de... by Godel_unicode on Monday August 01, 2022 @02:31PM (#32310253)
If you’re not talking about federal roads then I don’t think your comment is relevant to a discussion of US Government projects.
Re:US regulators will certify first small nuclear reactor de... by Spooky23 on Saturday July 30, 2022 @08:42PM (#32291898)
A few that come to mind:

- Alaskan Way Viaduct

- Tappan Zee bridge replacement

- Billions in highway projects.

Re:US regulators will certify first small nuclear reactor de... by cpwright on Sunday July 31, 2022 @09:17AM (#32295292)
I might not hold up the new Tappan Zee Bridge as a beacon of meeting design goals.

https://www.timesunion.com/news/article/mario-cuomo-bridge-s...

Re:US regulators will certify first small nuclear reactor de... by pyrale on Sunday July 31, 2022 @06:53AM (#32294723)
Maybe you should stop electing people whose campaign talk is that US agencies are a big mess?

I mean, these people basically gain popularity when government is shown to be inefficient, but at the same time, they're the ones tasked with running the government.

[dead]
Re:US regulators will certify first small nuclear reactor de... by hedora on Saturday July 30, 2022 @09:03PM (#32292059)
Fukishima was still probably cleaner per kWh than most coal plants.
Re:US regulators will certify first small nuclear reactor de... by tragictrash on Saturday July 30, 2022 @07:28PM (#32291416)
You shouldn't leave it there, because that accident has nothing to do with cost scaling.

Why don't you leave the thinking for the ones better at it.

Re:US regulators will certify first small nuclear reactor de... by worik on Saturday July 30, 2022 @07:48PM (#32291540)
> You shouldn't leave it there, because that accident has nothing to do with cost scaling.

The accident, that single accident on its own, probably doubled the cost of nuclear power to Japan. It is hard to tell because the costs have not all been paid and are mounting still.

This is the Achilles heal of nuclear power, that the boosters want us to ignore: The risk of catastrophic failure. One reactor can be looked after carefully (not economically - others have pointed out here the eye watering costs) and safely. But lots of reactors? No. We will keep have catastrophic failures until we stop.

Re:US regulators will certify first small nuclear reactor de... by shakna on Saturday July 30, 2022 @07:52PM (#32291570)
> But lots of reactors? No. We will keep have catastrophic failures until we stop.

The military have fielded many reactors for a considerable amount of time. We've got a bit over fifty years of fielding nuclear reactors in submarines. Where are all the inevitable disasters, if that is the case?

Re:US regulators will certify first small nuclear reactor de... by worik on Saturday July 30, 2022 @08:05PM (#32291665)
> The military have fielded many reactors for a considerable amount of time. > We've got a bit over fifty years of fielding nuclear reactors in submarines. Where are all the inevitable disasters, if that is the case?

https://en.wikipedia.org/wiki/List_of_sunken_nuclear_submari...

Three from the USA navy. It is a lie that the nuclear reactors on submarines have been safe. Two have been lost at sea (one was sunk in harbour)

Nuclear reactors on ships generally, submarines in particular, are a terrible idea. As evidenced by the fact that the US Navy has sunk three, two catestrophically. If the US Navy cannot do it, who can?

Re:US regulators will certify first small nuclear reactor de... by shakna on Saturday July 30, 2022 @08:20PM (#32291764)
2 disasters in 50 years is not exactly catostrophic.

We've had over 120 shipping disasters in that same timeframe, resulting in many thousands greater loss of life, and greater environmental disasters.

https://en.m.wikipedia.org/wiki/List_of_maritime_disasters_i...

Should global shipping be abolished?

Re:US regulators will certify first small nuclear reactor de... by worik on Sunday July 31, 2022 @03:50PM (#32298221)
Two disasters that leave nuclear reactors irrecoverably deep is indeed a catastrophe.

If you care at all for the future.

But the present trumps the future...

Re:US regulators will certify first small nuclear reactor de... by shakna on Sunday July 31, 2022 @10:07PM (#32301094)
The number of oil spills that happened in that same time frame, that we're still trying to recover from, exceeds that by a great number. The environmental damage caused by those isn't purely theoretical.

Compare that, to the Exxon Valdez, and the Deepwater Horizon.

Re:US regulators will certify first small nuclear reactor de... by tragictrash on Tuesday August 02, 2022 @03:23PM (#32323126)
I'd like you to demonstrate what damage that's causing.
Re:US regulators will certify first small nuclear reactor de... by kspacewalk2 on Saturday July 30, 2022 @08:22PM (#32291774)
Why don't you keep reading the article on the list submarines that you referenced, all the way down to the 4th paragraph that talks about causes of sinking.

1 of 9 (Soviet K-37) was scuttled with no loss of life due to reactor issues spanning years. 1 had an undetermined cause of sinking with theories having to do with the usual submarine issues (fire, torpedo accent, ballast/pressure issues), not its reactor. All others were lost for reasons having nothing to do with nuclear reactors.

Re:US regulators will certify first small nuclear reactor de... by kelnos on Saturday July 30, 2022 @11:44PM (#32292967)
Huh? Only one of those subs had issues with its nuclear reactor, but there was no "disaster": it was scuttled in a controlled manner (though unfortunately in a location that the IAEA disagreed with).

All the other incidents listed had nothing to do with their nuclear reactors; they would have all sunk just the same had they been powered by diesel fuel.

I'm not sure what you mean by the US Navy sinking two "catastrophically": none of the deaths listed on the page you link have anything to do with the fact that nuclear power was used.

However, you probably should have linked this section of the overall article on nuclear submarines:

https://en.wikipedia.org/wiki/Nuclear_submarine#Reactor_acci...

It's weird that the section starts off with "Some of the most serious nuclear and radiation accidents by death toll in the world have involved nuclear submarine mishaps", as the following list doesn't seem to support that, only cataloguing 28 deaths and 162 cases that probably included lifelong health problems. (These numbers are not great, but still not as bad as for land-based reactor incidents, and tiny compared to deaths and health problems caused by burning fossil fuels.) They do claim "substantial radioactivity released" in several of the incidents, but don't quantify the effects, or what the effects would have been if it had been a land-based reactor (so maybe very bad!).

I hesitate to mention this (as I don't want to sound dismissive), but it might be notable to consider that all of these incidents occurred on Soviet subs, and that there hasn't been an incident since 1989. The navies of the US, UK, France, China, India, and post-Soviet Russia have never (at least as far as we know) had a reactor incident with their nuclear-powered subs.

Re:US regulators will certify first small nuclear reactor de... by TheSpiceIsLife on Saturday July 30, 2022 @08:34PM (#32291838)
What are the issues with sunk nuclear submarines?

I tend to think the bottom of the ocean is a reasonably good place for the nuclear reactors in those subs.

Re:US regulators will certify first small nuclear reactor de... by runarberg on Sunday July 31, 2022 @05:09PM (#32298864)
I don’t think you actually believe that the bottom of the ocean is a good place to keep nuclear waste.

You would probably agree with me—and most other people—that a nuclear power plant, the was caught throwing their waste into the ocean, would be an environmental disaster. The US navy doing the same thing is also an environmental disaster.

Re:US regulators will certify first small nuclear reactor de... by TheSpiceIsLife on Wednesday August 03, 2022 @09:32PM (#32338386)
Presumably the reactors in submarines are commanded to scram when the sub is in trouble.

So the reactor is a high corrosion resistant stainless vessel in non-critical state at the bottom of many tens (hundreds?) of metres of ocean.

All told, that doesn't seem an entirely unreasonable place for it. Even if it was critical, in the active state before the sub sank, it'd probably just heat water for a decade or too before it eventually cools down.

Even if it suffered a meltdown, that's not ideal, but I'm not gonna lose any sleep over it.

Re:US regulators will certify first small nuclear reactor de... by worik on Sunday July 31, 2022 @03:51PM (#32298228)
Do you really think that?

We are dealing now with barrels of DDT dropped in deep water off the Californian coast

Re:US regulators will certify first small nuclear reactor de... by saxonww on Saturday July 30, 2022 @08:41PM (#32291892)
Genuine question: is this a nuclear power failing, or a business failing?

According to the wiki article, several issues from the inception of the plant through the failure were ignored, all of which either made the failure worse or would have arguably prevented it. My understanding is that the plant itself was already supposed to have been shut down, but duty was extended; I'm not sure if this was to move towards break-even on cost, or just to prevent a power generation gap, or make more money. Note that the plant in question is one that had been shut down previously because TEPCO had been caught falsifying inspection and repair records.

IMO (as a total non-expert) nuclear is probably safe, it's the people running it that screw it up for everyone. Maybe that's not a meaningful distinction? I'd sure like to have a discussion about nuclear that doesn't conflate failures of leadership with failures of technology, though.

Re:US regulators will certify first small nuclear reactor de... by ekianjo on Saturday July 30, 2022 @09:15PM (#32292156)
you better leave it there because any other word would show how bad of a point it is.
Re:US regulators will certify first small nuclear reactor de... by titzer on Saturday July 30, 2022 @10:14PM (#32292523)
> In fact, nuclear has always been the most expensive method of generating electricity

Just wonder if we're pricing in those externalities from coal, like hundreds of thousands of deaths per year due to air pollution and the fact that it is completely fucking up the atmosphere, leading to a global catastrophe. Because...we're not.

Re:US regulators will certify first small nuclear reactor de... by ZeroGravitas on Sunday July 31, 2022 @08:17AM (#32295026)
Including air pollution externalities, nuclear is definately cheaper.

Some of the costs/risks with nuclear are a bit black swannish though which complicates matters.

Energy efficiency, pollution controls and carbon taxes are the real magical tech we've not exploited.

Because cheaper in the long run means more expensive right now, which is a vulnerable political soft spot that psycopaths can easily exploit.

Re:US regulators will certify first small nuclear reactor de... by Gwypaas on Sunday July 31, 2022 @04:10AM (#32294118)
Great that the alternative is renewables then!
Re:US regulators will certify first small nuclear reactor de... by Veedrac on Saturday July 30, 2022 @09:03PM (#32292056)
Nuclear is uneconomical because safe, economical nuclear is illegal. That's it. If everyone were pro-nuclear, those laws wouldn't exist (or would exist in a sane form), and nuclear would be cheap.
Re:US regulators will certify first small nuclear reactor de... by kortilla on Saturday July 30, 2022 @07:38PM (#32291476)
Nuclear never achieved economies of scale because of the anti nuclear crowd. The cumulative number of nuclear power plants built is a drop in the bucket compared to coal and gas plants.
Re:US regulators will certify first small nuclear reactor de... by epistasis on Saturday July 30, 2022 @08:27PM (#32291798)
I'm not sure how the anti-nuclear crowd stopped that. There was a general mismanagement and misestimstion of how much nuclear was needed. And then there was a massive amount of construction mismanagement.

Even in France, which has a very supportive population, and is usually heralded as a nuclear success story, saw increasing costs rather than decreasing costs as they build more of the same reactor model.

Construction productivity doesn't increase like manufacturing productivity does. Nuclear's failures are, as far as I can tell, entirely the responsibility of those tasked with building it. And it's quite possible that nuclear only makes sense at a certain level of economic development, with the right level of technology, but not too much technological development such that manufacturing has completely eclipsed construction.

Go to any investor that would build nuclear, and they won't cite public opposition as the reason not to build, they will cite the construction risk.

And that's why this SMR design is being tried rather than large reactors.

Re:US regulators will certify first small nuclear reactor de... by pfdietz on Saturday July 30, 2022 @09:16PM (#32292165)
Hail Mary Reactors are being tried because they're nuclear's last chance.
Re:US regulators will certify first small nuclear reactor de... by pyrale on Sunday July 31, 2022 @07:03AM (#32294764)
> Even in France, which has a very supportive population, and is usually heralded as a nuclear success story, saw increasing costs rather than decreasing costs as they build more of the same reactor model.

I'd be curious to learn where you got your data for this, because I have never been able to find such data. Best I could get was average cost of a plant in a "pallier".

What I can provide is building duration, which definitely goes down as more of the same model are built, but there's no guarantee that building duration and cost are equal here.

Re:US regulators will certify first small nuclear reactor de... by epistasis on Sunday July 31, 2022 @10:33AM (#32295751)
I spent years asking people who claim that France's cost were low for the data behind it to no avail, but only finally stumbled upon somebody linking to this paper in a different context:

https://www.sciencedirect.com/science/article/abs/pii/S03014...

There's another paper somewhere in my bookmarks that shows this for reactors of the same model built in the US, and maybe also France, but I'm having trouble locating it right now...

As with any single publication, it can't be taken as the revealed truth, but it's the best I have at hand.

Edit: how could I have forgotten about the infamous Loveringe, Yip, Nordgard paper! This is impressive because it does the analysis across many countries, and finds a few with cost decreases, but a dominant trend towards more expensive construction:

https://reader.elsevier.com/reader/sd/pii/S0301421516300106?...

My personal, untested, hypothesis is that these variations have mostly to do with the general cost of labor in a country, and in particular their level of economic advancement, which establishes a floor on the value of an hour of a person's labor. Specifically, my guess is that construction is only feasible for nuclear when a country is in a magic sweet spot where labor is cheap, and technological advancement is moderate, like 1950s-70s US level. But not so advanced that labor has gotten so expensive that skilled labor like welders have more productive uses of their time.

If my theory is correct, future costs for South Korea should rise from where they were before stopping their program (in a flurry of corruption scandals, I would note. Nobody brings up South Korea as an example of successful construction anymore, instead having to resort to suggesting Rosatom should embark on a massive building spree across the globe.)

Re:US regulators will certify first small nuclear reactor de... by pyrale on Sunday July 31, 2022 @03:37PM (#32298121)
The abstract looks interesting, but I can't find it in open access. If you have access to it, what would be interesting to look at is cost evolution within a batch ("pallier" in french). Cost of newer batches compared to older batches isn't really relevant, as France progressively moved from 900MW reactors to 1450MW ones. Newer batches were also notably smaller, leaving less room for design improvement or cost optimization.
Re:US regulators will certify first small nuclear reactor de... by nojvek on Saturday July 30, 2022 @05:52PM (#32290727)
Do you have source for nuclear energy is “too expensive”?
Re:US regulators will certify first small nuclear reactor de... by baix777 on Saturday July 30, 2022 @07:36PM (#32291464)
Nuclear needs subsidies due to a long history of large cost overruns and other issues.

https://energypost.eu/how-profitable-is-an-investment-in-nuc...

And France, with many Nuclear plants, has recently had issues keeping the plants up. Many of the most problematic plants are newer ones.

https://www.ans.org/news/article-3939/frances-energy-woes-wo...

The reality is economies of scale have kicked in for solar and wind energy in a way they never can for nuclear. We are at the point where it makes sense, at times, to overprovision renewals to ensure enough supply.

The issue with renewables is storage, of course. But that problem looks to be more solvable than cost effective nuclear, a problem which we have not solved in over 50 years. One can say if we were only smarter we could make nuclear more cost effective, which is probably true. But we built a nuclear power plant where a tsunami occurred in the past, only to find it occurred again, so we aren't that smart. The issue with nuclear is everything has to be right for it to be cost effective and safe, and nuclear is too complex for humans to consistently do this.

Safe nuclear power that is also cost effective is not a problem we have solved.

Re:US regulators will certify first small nuclear reactor de... by zizee on Saturday July 30, 2022 @07:59PM (#32291624)
SMRs are an opportunity for economies of scale to kick in for nuclear. If you can start building reactors in factories, and interate on designs, then you can see economies of scale kick in.*

That said, I am not super bullish on nuclear, and agree with your position. Solar and wind are just getting too cheap for nuclear to get the investment needed to catch-up. If we see someone crack the code on cheap storage of electiciy, solar and wind will runaway with the prize. Not coincidentally, storage is has vastly more investment of money and brains on looking for ways to scale vs nuclear.

*Safety concerns with nuclear will make iterative design difficult to pull off!

Re:US regulators will certify first small nuclear reactor de... by tremon on Saturday July 30, 2022 @09:34PM (#32292286)
Nuclear needs subsidies

So do oil and coal [0]:

> Globally, fossil fuel subsidies were $5.9 trillion in 2020 or about 6.8 percent of GDP, and are expected to rise to 7.4 percent of GDP in 2025

[0]: https://www.imf.org/en/Publications/WP/Issues/2021/09/23/Sti...

Re:US regulators will certify first small nuclear reactor de... by okr on Saturday July 30, 2022 @07:51PM (#32291564)
Never say never. And about solvable storage: right now it is not solved. So it makes sense to go nuclear (again).
Re:US regulators will certify first small nuclear reactor de... by VintageCool on Saturday July 30, 2022 @11:38PM (#32292935)
There was scarcely any financial incentive to address the grid scale energy storage problem until like two or three years ago. There are a half dozen startups working on it now.

My vote is to rapidly install renewables while we have the natural gas backstop, and give the storage startups a few years to make it happen. Energy Dome, Hydrostor, and Form Energy all look promising.

And if new nuclear turns out to be less expensive than expected, great.

Re:US regulators will certify first small nuclear reactor de... by pfdietz on Sunday July 31, 2022 @09:58AM (#32295510)
> There are a half dozen startups working on it now.

Many more than that.

Re:US regulators will certify first small nuclear reactor de... by kelseyfrog on Saturday July 30, 2022 @08:03PM (#32291656)
What are even the yardsticks by which nuclear storage success is even measured? /gen
Re:US regulators will certify first small nuclear reactor de... by Spooky23 on Saturday July 30, 2022 @07:51PM (#32291558)
It’s pretty easy to google comparative costs.

It’s really hard to invest billions of capital dollars that won’t produce any return for a decade while you can realize immediate return on solar with costs that drop every year.

Accountants are the worst enemy of nuclear, not activists.

Re:US regulators will certify first small nuclear reactor de... by nightski on Saturday July 30, 2022 @08:42PM (#32291893)
If they were comparable that might be true, but they are not interchangeable.
Re:US regulators will certify first small nuclear reactor de... by Paradigma11 on Sunday July 31, 2022 @08:13AM (#32295009)
The most expensive energy is wind and solar after a few weeks of low wind in a cloudy winter.
Re:US regulators will certify first small nuclear reactor de... by pfdietz on Sunday July 31, 2022 @09:56AM (#32295496)
Fortunately, that very rarely happens, so backing it up with gas turbine plants (burning hydrogen, ultimately) is cheaper than dealing with the 365/24/7 high cost of nuclear.
Re:US regulators will certify first small nuclear reactor de... by Paradigma11 on Sunday July 31, 2022 @12:56PM (#32296867)
Nice, i would have guessed that duplicating the production infrastructure and the added loss of hydrogen transformation would be more problematic.

Do you have any actual numbers at hand?

"...is cheaper..." is a bit vague.

Re:US regulators will certify first small nuclear reactor de... by pfdietz on Sunday July 31, 2022 @01:03PM (#32296927)
I'll point to the simulation site I always link to: https://model.energy/

This uses real weather data for various countries and optimize solar + wind + batteries + hydrogen to provide a constant output at minimum cost. The results are interesting. You can tweak the cost assumptions.

Re:US regulators will certify first small nuclear reactor de... by karaterobot on Saturday July 30, 2022 @08:02PM (#32291654)
This is an article about nuclear plants starting to be produced at scale.
Re:US regulators will certify first small nuclear reactor de... by landemva on Saturday July 30, 2022 @05:47PM (#32290684)
That vision needs waste disposal or processing, which Jimmy Carter halted when he took office. It matters little that Ronald Reagan removed the prohibition, as investors will not put capital toward that again because the investment can be wiped out a few years later based on whims of politics. Without waste processing, storage of waste onsite forever creates an investment problem for new construction in USA.

https://www.reuters.com/article/us-usa-nuclearpower-waste-id...

'Former President Jimmy Carter halted reprocessing in 1977, citing proliferation concerns.'

Re:US regulators will certify first small nuclear reactor de... by kova12 on Saturday July 30, 2022 @10:26PM (#32292582)
This is such a misguided argument. Amount of nuclear waste is so negligible compared to common waste, it doesn't deserve to even be argued about. Not only that, but today's nuclear waste in couple of decades could become a treasure for next generations. Discussion should be: we either develop new energy sources or we don't. Either works for me, but if you don't want to go on with progress, then shut up about climate change and stop calling yourself progressive
Re:US regulators will certify first small nuclear reactor de... by pvarangot on Saturday July 30, 2022 @09:09PM (#32292117)
The proliferation concerns probably got worse. I wouldn't invest in this in the US unless there was like a constitutional amendment saying we can reprocess.
Re:US regulators will certify first small nuclear reactor de... by volkl48 on Saturday July 30, 2022 @09:49PM (#32292385)
We're actively building new nuclear weapons anyway, I don't see how reprocessing changes any of that calculation?
Re:US regulators will certify first small nuclear reactor de... by pfdietz on Sunday July 31, 2022 @12:03AM (#32293063)
The investors didn't put money toward it because it had no economic foundation. Uranium is too cheap, enrichment became cheaper, and separated plutonium has negative value. The French have admitted their reprocessing was net more expensive than not doing it.
Re:US regulators will certify first small nuclear reactor de... by AlexCoventry on Saturday July 30, 2022 @08:07PM (#32291676)
Seems like dirty bombs would be a lot easier to make, in a world with ubiquitous nuclear power plants.
Re:US regulators will certify first small nuclear reactor de... by kuhewa on Saturday July 30, 2022 @08:42PM (#32291896)
You'd think control over the materials in these small plants would be much better than for the radioactive materials already widespread and easy to obtain, like cesium 137 calibration sources used in healthcare [1]. Apparently one of these would allow a dirty bomb to contaminate 40 city blocks [2]. So I reckon there are easier existing sources for radioactive materials if one wanted to cause mass panic, I don't think spent fuel rods are going to end up in the municipal waste.

1 https://www.perkinelmer.com/au/product/cesium-137-calibratio...

2 https://www.wired.com/2011/10/ff-radioactivecargo/

Re:US regulators will certify first small nuclear reactor de... by pyrale on Sunday July 31, 2022 @07:52AM (#32294933)
Dirty bombs are already easy to make: there is radioactive material in every town for medical purpose.
Re:US regulators will certify first small nuclear reactor de... by akiselev on Sunday July 31, 2022 @01:02AM (#32293312)
> I’m confident that with advances in material science we would figure out how to build safe nuclear aircraft and nuclear rockets, ushering in a new space age.

I'm absolutely certain of it. In regards to nuclear rocketry, it wasn't even the anti-nuclear crowd that killed one of the most promising technologies but they certainly guaranteed it would die in the dustbins of JPL's archive.

NASA and the United Aircraft Corporation came up with a reactor design called the nuclear lightbulb [1] that used tens of kilograms of uranium instead of thousands by heating uranium hexaflouride [^1] to a plasma and using an irrotational vortex [^2] of neon gas to compress it until it became a self sustaining [^3] black body radiator [^4]. They were just about to test the reactor with real fuel when it was canceled (during Nixon's administration as part of the Mars program) but they managed to experimentally identify the remaining production challenges like the computational power needed to keep the core stable and the material science necessary to separate the vortex from the fluid economically. There has been so much progress in fields that address those challenges that many of the problems are considered solved and the remainder are surmountable engineering problems.

I really hope with this renewed interest in nuclear someone eventually revives the design and tries to bring it to its conclusion. Just based off of the declassified publications from the 60s and early 70s [2][3][4][5] it is obvious how much potential this design had: it's safe [^5], useful for rocketry and terrestrial power generation, and self breeding by nature of its design [^6]. Who knows where we could be in space exploration and the battle against climate change had the design been fully explored.

[1] https://en.wikipedia.org/wiki/Nuclear_lightbulb

[2] https://ntrs.nasa.gov/citations/19730018850

[3] https://ntrs.nasa.gov/citations/19730018851

[4] https://ntrs.nasa.gov/citations/19710010820

[5] and many more in the JPL archives! Search for "gas core reactor"

[^1] UF6 is the most common intermediate in the enrichment process and depleted UF6 is how most of our nuclear waste is stored... and this reactor is a perfect breeding reactor for the waste (see [^5]). All of the infrastructure for dealing with the materials have existed since the Manhattan project.

[^2] the opposite of a rotational vortex like a tornado, which have calm centers. In an irrotational vortex the particles in the center have the highest velocity and in the reactor it acts like a centrifuge, forcing the uraninum to the center and compressing it to tens or hundreds of atmospheres. This part was tested experimentally.

[^3] the energy of the plasma and compression from the vortex increase the neutron cross section to the point where the nuclear reaction becomes self heating with only 20kg of fuel. They stopped just short of testing the full cycle but this is the same concept behind nuclear weapons, which use precise explosives to compress nuclear fuel until it reaches criticality, except the vortex can't generate the kind of pressures necessary for a nuclear explosion.

[^4] the NASA/UAC design heats the UF6 till it radiates most of its energy away as UV. Classical steam turbines or hydrogen gas seeded with tungsten nanoparticles (in the case of a rocket engine) allow the system to extract power.

[^5] since it's an active design, tons of power is required to pump the vortex and keep the core in a fissile regime. If any part of the system fails, the core loses pressure and becomes a really expensive gas canister until the chamber is cleaned up and the core restarted. With a plasma window separating the core from a vacuum, the entire system can be designed to depressurize safetly.

[^6] anything injected into the core gets bombarded by neutrons and the vortex system constantly wicks away small amounts of the core. The system forms a closed loop that recycles unused fuel via centrifuge and it can also separate out transmuted waste [*]. The NASA/UAC team tested this with a neutron gun to simulate fission in the core.

[*] we could have had honest-to-god alchemy!

Re:US regulators will certify first small nuclear reactor de... by tcbawo on Saturday July 30, 2022 @07:36PM (#32291462)
One benefit of many small reactors is that, should an area become a conflict zone in the future, relocation is more feasible.
Re:US regulators will certify first small nuclear reactor de... by narrator on Saturday July 30, 2022 @05:38PM (#32290593)
If we had all that then all the things besides energy that are used in production would be depleted faster. We would have bigger populations, etc.
Re:US regulators will certify first small nuclear reactor de... by runarberg on Saturday July 30, 2022 @05:18PM (#32290439)
This is wishful thinking. France for example never had a Three mile island type of disaster which tilted the public opinion of nuclear power, like the USA did. They continued building up their nuclear power plants well into the 1990s but failed to bring construction costs and delays down like your comment suggests.

In fact if we take Germany as a counter-example, when they stopped building nuclear power plants due to popular demand, they significantly increased renewable energy to a point where they are currently replacing coal power at a greater rate then France, despite Germany actively shutting down nuclear plants that still had years of life left.

This shows that Nuclear power might actually be a hindrance towards an electrified future, as governments have historically put to much faith in it, which was ultimately unwarranted, instead of investing in renewables.

EDIT: I feel like people are focusing on the wrong point here. I was apparently—and unintentionally—disingenuous by touting Germany’s success in replacing coal power with renewables, as compared to France. However, my main point still stands, that investing in nuclear well into the 1990s did not bring costs and delays of new plants down.

Re:US regulators will certify first small nuclear reactor de... by pyrale on Saturday July 30, 2022 @06:29PM (#32291002)
> They continued building up their nuclear power plants well into the 1990s but failed to bring construction costs and delays down like your comment suggests.

> In fact if we take Germany as a counter-example, when they stopped building nuclear power plants due to popular demand, they significantly increased renewable energy to a point where they are currently replacing coal power at a greater rate then France, despite Germany actively shutting down nuclear plants that still had years of life left.

Rarely have I seen reality mistreated so blatantly.

France has barely used coal in the last 4 decades, and so it seems to be enough to claim that, by slowly reducing their coal use, Germany does much better.

That reminds me of the popular definition of chutzpah: the person that asks for mercy after murdering his parents, since, afterall, he's now an orphan.

> However, my main point still stands, that investing in nuclear well into the 1990s did not bring costs and delays of new plants down.

Your main point is wrong. [1] shows that each model has experienced faster build time as new units were built. What is true is that new, more advanced designs can take more time to build than older, less advanced designs.

[1]: https://fr.wikipedia.org/wiki/Liste_des_r%C3%A9acteurs_nucl%...

Re:US regulators will certify first small nuclear reactor de... by thematrixturtle on Saturday July 30, 2022 @08:10PM (#32291697)
That graph shows nothing of the sort, and it conveniently excludes the 2010s, where Areva's Olkiluoto 3 plant in Finland has been under construction for 17 years and is still not finished.

https://en.wikipedia.org/wiki/Olkiluoto_Nuclear_Power_Plant

Re:US regulators will certify first small nuclear reactor de... by pyrale on Sunday July 31, 2022 @05:44AM (#32294456)
> That graph shows nothing of the sort

  CP0: first reactor 6.5y, last reactor 5y
  CP1: first reactor 6y,   last reactor 5y
  CP2: first reactor 5y,   last reactor 6y
  P4 : first reactor 7y,   last reactor 6y
  P'4: first reactor 7y,   last reactor 6.5y
  N4 : first reactor 12y,  last reactor 7.5y
That's 5/6 designs where building multiple plants lead to faster build times.

> it conveniently excludes

Honestly, I suspect you're just namedroping here. But let's adress the point: Olkiluoto and Flamanville are the first 2 reactors of their generation, I'm not sure what you want to compare them to in terms of build time. My guess is that Hinkley point will get built much faster, and that we may see further improvements if more are built.

Re:US regulators will certify first small nuclear reactor de... by ncmncm on Saturday July 30, 2022 @10:11PM (#32292512)
Even after being declared finished, it isn't.
Re:US regulators will certify first small nuclear reactor de... by The_Double on Saturday July 30, 2022 @05:31PM (#32290541)
> they are currently replacing coal power at a greater rate then France, despite Germany actively shutting down nuclear plants that still had years of life left.

That sounds a less impressive when you rephrase it as saying they went from 15x more coal use than france to 9x as much. Percentage wise the decrease seems similar in the last few years.

source: https://www.iea.org/countries/france https://www.iea.org/countries/germany

Re:US regulators will certify first small nuclear reactor de... by jjoonathan on Saturday July 30, 2022 @05:26PM (#32290505)
> governments have historically put to much faith in it

If we (US) hadn't stopped building nuclear in the 80s and had instead merely key up the pace, our grid wouldn't be 20% nuclear like it is today, it would be 100% nuclear.

Instead, we made the choice to pump 20 gigatons of carbon into the atmosphere while we waited for solar and wind to become viable. I'm glad they finally are -- they just broke into double digits, in a few years they will pass the nuclear buildout we stopped in the 80s -- but that was one helluva waiting cost.

Re:US regulators will certify first small nuclear reactor de... by pfdietz on Sunday July 31, 2022 @10:00AM (#32295524)
"If nuclear hadn't failed, it would have succeeded."
Re:US regulators will certify first small nuclear reactor de... by runarberg on Saturday July 30, 2022 @05:38PM (#32290598)
This is false dichotomy. The US government also had the option of investing in renewables as early as the 1970s. They simply didn’t. The success of Germany’s recent investment suggests that was a wrong choice.
Re:US regulators will certify first small nuclear reactor de... by scoopertrooper on Saturday July 30, 2022 @06:37PM (#32291060)
In fairness solar efficiency was below 10% in the 1970s, while the world was already producing many gigawatts of nuclear energy at that time.

It's not as though Germany could have 'decided' in the 1970s to have 2022 technology. Sure, increased investment at the time may have sped up the development of renewables, but it still wouldn't be fast. Science doesn't quite work that way.

Re:US regulators will certify first small nuclear reactor de... by ncmncm on Saturday July 30, 2022 @07:30PM (#32291428)
Solar efficiency and cost would have been where they are today by 1990, and we would not now be facing imminent, impending Climatic Catastrophe. Energy during ie past 30 years would have been radically cheaper. Coal plants and nuke plants alike would have been shuttered as unsustainable, not for their CO2 but just because they cost too damn much.

But here we are, instead. Thank Reagan. And Bush. And Bush, again.

US spent $5T trashing Iraq and Afghanistan. That would have paid for completely switching over to renewables, several time over.

Re:US regulators will certify first small nuclear reactor de... by pyrale on Sunday July 31, 2022 @08:01AM (#32294972)
> Solar efficiency and cost would have been where they are today by 1990

This seems to be implying that basically all the research was done between the 2000's and now, and that scientists had been twiddling their thumbs between 1970 and 2000. Actually, scientific advances between 1970 and 2000 were critical to enable the renewables boom that we experienced since 2000.

Could it have gone faster if more funds had been made available? Maybe. But claiming that we "lost" 30 years in research on that topic simply shows ignorance about the way research works.

> US spent $5T trashing Iraq and Afghanistan. That would have paid for completely switching over to renewables, several time over.

Yeah, and if the Romans hadn't spent so much time fighting with their neighbours, we would all be eating free lunches now.

Re:US regulators will certify first small nuclear reactor de... by ZeroGravitas on Sunday July 31, 2022 @08:28AM (#32295055)
Simply not subsidizing polluting fossil fuels would have been a major boon to solar, wind, nuclear, energy efficiency, economic growth.

There's reports around about what actually drove the price drops in renewable, and while research plays it's part, market support and scale are big factors, we definately squandered multiple opportunities to nip climate change in the bud.

Re:US regulators will certify first small nuclear reactor de... by thrown_22 on Saturday July 30, 2022 @08:19PM (#32291749)
So you're argument is that in an alternative timeline where we'd invested more money we would have invented technology in the 1980s that still doesn't exist in the 2020s?
Re:US regulators will certify first small nuclear reactor de... by spopejoy on Saturday July 30, 2022 @09:38PM (#32292315)
Uhh, renewables are here today. The parent was refuting that "solar wasn't ready" by making the point that the progress in renewables is attributable to increased industrial activity and funding.

Reagan took the solar panels off the White House for a reason, so his buddy James Watt could kill off any alternatives to fossil energy. That regime lasted until the 90s and by then any memory of the oil crises in the 70s was long gone.

Re:US regulators will certify first small nuclear reactor de... by opo on Sunday July 31, 2022 @03:08AM (#32293843)
>Reagan took the solar panels off the White House for a reason, so his buddy James Watt could kill off any alternatives to fossil energy.

The panels installed on the White House were not photovoltaic solar panels - they were solar water heater panels. (After they damaged the roof, they weren't replaced after the repairs were done.) It wouldn't have been possible to run the economy on solar water heater panels.

Re:US regulators will certify first small nuclear reactor de... by pfdietz on Sunday July 31, 2022 @10:02AM (#32295529)
And traditional solar hot water is today obsolete. It's cheaper to use PV and a heat pump water heater.
Re:US regulators will certify first small nuclear reactor de... by runarberg on Saturday July 30, 2022 @11:16PM (#32292822)
Not OP, but yes! I believe the argument is that in an alternative timeline where the US government invested in renewables, they would be both more technologically advanced and more commercially feasible today.

I’m not the biggest fan of arguing about alternate history, but this thread originally spun out after an ancestor poster claimed we would have a rosy present if only we had invested more in nuclear energy. I claim I find way more wishful then claiming the same about renewables.

Re:US regulators will certify first small nuclear reactor de... by thrown_22 on Saturday July 30, 2022 @11:31PM (#32292885)
So on the one hand we have a technology that existed since the 1960s and would have solved global warming if we'd merely spent money building it out.

On the other we have a technology that still doesn't exist in the 2020s and would also need to be build out.

Cockroach archeologists will be puzzled why we chose to go extinct.

Re:US regulators will certify first small nuclear reactor de... by kelnos on Saturday July 30, 2022 @11:54PM (#32293015)
> On the other we have a technology that still doesn't exist in the 2020s

You keep saying this, but I'm not sure where it's coming from. Reading upthread, my interpretation is that we are specifically talking about the technology that exists today, in 2022.

I think it's entirely reasonable that, if investments into renewables were made in the 70s and 80s at a level comparable to investments in fossil fuels or nuclear, we would have seen, in the 90s, renewables technology comparable to what we have today. No, it wouldn't be the same technology, but I could see efficiency numbers being similar, though perhaps at a bit higher cost.

Re:US regulators will certify first small nuclear reactor de... by thrown_22 on Saturday July 30, 2022 @08:05PM (#32291662)
German success? You mean the country headed into a winter where they will be shutting down their industry have people freeze to death at the whim of Putin?

I shudder to think what failure looks like to you.

Re:US regulators will certify first small nuclear reactor de... by ncmncm on Saturday July 30, 2022 @10:19PM (#32292554)
Germany is today burning less coal than would have been necessary if they had refurbished their nukes instead of spending the money building out wind.

Operating the wind farms is much cheaper than operating the nukes and mining the extra coal would have been. That opex savings goes to more capex wind generation capacity, further reducing costs by each GW displaced.

So, yes, success. Not being off coal already is not failure. Replacing an entire country's energy infrastructure takes time, no matter what.

Re:US regulators will certify first small nuclear reactor de... by thrown_22 on Saturday July 30, 2022 @11:31PM (#32292887)
> Germany is today burning less coal than would have been necessary if they had refurbished their nukes instead of spending the money building out wind.

Looks at France

Sure.

Re:US regulators will certify first small nuclear reactor de... by ncmncm on Sunday July 31, 2022 @02:53AM (#32293790)
France is, at the moment, importing power, because their nukes are largely turned off. So, sure, look at France.
Re:US regulators will certify first small nuclear reactor de... by thrown_22 on Sunday July 31, 2022 @04:03AM (#32294090)
And are a net exporter by around 10%. Meanwhile in Germany: https://www.cleanenergywire.org/news/germany-turns-electrici...
Re:US regulators will certify first small nuclear reactor de... by ncmncm on Sunday July 31, 2022 @10:21AM (#32295662)
You are comparing emergency war response to energy policy. Desperate much?
Re:US regulators will certify first small nuclear reactor de... by thrown_22 on Sunday July 31, 2022 @11:58AM (#32296426)
You're the one comparing the worst heat wave in recorded history to business as usual.
Re:US regulators will certify first small nuclear reactor de... by ncmncm on Sunday July 31, 2022 @03:02PM (#32297834)
You seem to imagine that heat waves are not now normal.
Re:US regulators will certify first small nuclear reactor de... by thrown_22 on Sunday July 31, 2022 @06:05PM (#32299300)
Yes, imagine thinking that the hottest day in record across Europe is not something that will happen daily.
Re:US regulators will certify first small nuclear reactor de... by ncmncm on Sunday July 31, 2022 @10:33PM (#32301273)
Every couple of years we get a new "hottest on record". Maybe look up global climate disruption records?
Re:US regulators will certify first small nuclear reactor de... by espadrine on Saturday July 30, 2022 @05:34PM (#32290563)
> France for example never had a Three mile island type of disaster which tilted the public opinion of nuclear power

Despite that, the public opinion soured so bad, that it is the detractors that had to bring disaster to nuclear reactors. Protestors fired rocket-propelled grenades at a plant[0]. It did not cause any nuclear danger.

On the other hand, the costs grew because the standards for risk grew to tremendous levels that are way, way above those applied for the coal and gas industries, or wind and solar for that matter.

[0]: https://en.wikipedia.org/wiki/Superph%C3%A9nix#Rocket_attack

Re:US regulators will certify first small nuclear reactor de... by asib on Saturday July 30, 2022 @05:42PM (#32290640)
> Despite that, the public opinion soured so bad, that it is the detractors that had to bring disaster to nuclear reactors. Protestors fired rocket-propelled grenades at a plant[0]. It did not cause any nuclear danger.

The wiki article you linked says the plant was unfinished. This would indicate the attack was a protest against the construction of the plant, not an attempt to induce a nuclear meltdown. You are perhaps unintentionally twisting the facts.

Re:US regulators will certify first small nuclear reactor de... by AshamedCaptain on Saturday July 30, 2022 @06:01PM (#32290788)
Besides, in France we've had "protest" attacks even against chip foundries. I would assume it par for the course for a nuclear plant.
Re:US regulators will certify first small nuclear reactor de... by ncmncm on Saturday July 30, 2022 @10:22PM (#32292567)
That said, historically chip factories have left overwhelming chemical messes.
Re:US regulators will certify first small nuclear reactor de... by baq on Sunday July 31, 2022 @02:29AM (#32293683)
Re:US regulators will certify first small nuclear reactor de... by orangeoxidation on Saturday July 30, 2022 @06:45PM (#32291122)
> They continued building up their nuclear power plants well into the 1990s but failed to bring construction costs and delays down like your comment suggests.

Absolutely true. It proved expensive even at large scale and with full support of the state. I don't trust promises or hypotheticals of cheap nuclear power, at all.

But here's the thing: France succeeded with decarbonizing their electricity production. It's a pretty notable success. Yes, it was (and remains) expensive and yes those plants are now failing often, remaining expensive ober their whole lifetime. But it worked and France could afford it.

I'd argue many other countries could afford it as well. The German electricity mix is a lot dirtier by comparison.

Re:US regulators will certify first small nuclear reactor de... by kitkat_new on Saturday July 30, 2022 @07:24PM (#32291400)
> But it worked and France could afford it.

failing plants due to their age and maintenance resulting in less nuclear power in the long run say otherwise

Re:US regulators will certify first small nuclear reactor de... by andrewmutz on Saturday July 30, 2022 @05:30PM (#32290527)
Do you have a source on the France vs Germany thing?

France uses 20x less coal than Germany to begin with (https://www.worldometers.info/coal/coal-consumption-by-count...) so I'm not sure about the comparison of reducing consumption

Also, during the recent conflict with Russia, Germany is turning coal plants back online and France is not.

Re:US regulators will certify first small nuclear reactor de... by ncmncm on Saturday July 30, 2022 @07:35PM (#32291459)
France is right now buying coal-fired power from across borders.

Domestic coal consumption figures are meaningless.

Re:US regulators will certify first small nuclear reactor de... by thrown_22 on Saturday July 30, 2022 @08:08PM (#32291679)
https://en.wikipedia.org/wiki/Electricity_sector_in_France

That's wrong. France is a net exporter of power, by over 50%. So even on aggregate it is a net benefit to the world since 90% of the power generated is CO2 free.

Re:US regulators will certify first small nuclear reactor de... by ncmncm on Saturday July 30, 2022 @10:24PM (#32292575)
France exports energy when the rivers are cold enough to operate their nukes. Rivers are just now close to maximum temperature.
Re:US regulators will certify first small nuclear reactor de... by thrown_22 on Saturday July 30, 2022 @11:20PM (#32292838)
Yes and? French electricity is 10 times less CO2 intensive to produce than German. Given that France exports 30% more electricity to Germany than they import it reduces the carbon footprint of both countries.
Re:US regulators will certify first small nuclear reactor de... by Redoubts on Saturday July 30, 2022 @06:01PM (#32290790)
> they are currently replacing coal power at a greater rate then France,

Germany is like 40% coal, and France is maybe 5%. It's easier to reduce at a faster rate when your use is still massive.

Re:US regulators will certify first small nuclear reactor de... by morning_gelato on Saturday July 30, 2022 @05:44PM (#32290661)
>This shows that Nuclear power might actually be a hindrance towards an electrified future, as governments have historically put to much faith in it, which was ultimately unwarranted, instead of investing in renewables.

Historically the countries that invested in nuclear and hydro have been most successful in lowering the carbon intensity of their energy sector. Looking at the data, Germany does not appear to be nearly as successful as France. In 2021 France's electricity averaged 68 gCO2/kWh, and Germany averaged 364 gCO2/kWh.

https://ourworldindata.org/grapher/low-carbon-share-energy?t...

https://ourworldindata.org/grapher/carbon-intensity-electric...

Re:US regulators will certify first small nuclear reactor de... by TameAntelope on Saturday July 30, 2022 @07:14PM (#32291325)
Oh yeah, and Germany is totally not in any kind of energy crisis right now due to lack of domestic energy sources...
Re:US regulators will certify first small nuclear reactor de... by kitkat_new on Saturday July 30, 2022 @07:21PM (#32291381)
nuclear isn't a domestic energy source either
Re:US regulators will certify first small nuclear reactor de... by samatman on Saturday July 30, 2022 @08:30PM (#32291819)
Re:US regulators will certify first small nuclear reactor de... by TameAntelope on Sunday July 31, 2022 @04:48PM (#32298695)
As if the source of the uranium was in any way comparable to gas or coal…
Re:US regulators will certify first small nuclear reactor de... by inejge on Saturday July 30, 2022 @05:13PM (#32290392)
It still blows my mind that a sub only needs to refuel once every 15 years.

One of the things making this possible is 90+ percent enrichment of U235 in the fuel. That's weapons grade and won't fly in a civilian reactor. I haven't read NuScale's application in great detail but I'd be surprised if they used anything above 5 percent.

Re:US regulators will certify first small nuclear reactor de... by schrodinger on Saturday July 30, 2022 @06:02PM (#32290792)
Can you explain more about what that means or suggest what to Google to learn more?
Re:US regulators will certify first small nuclear reactor de... by gautamcgoel on Saturday July 30, 2022 @06:10PM (#32290857)
There are two uranium isotopes present on earth, U-235 and U-238. U-235 is the fissile material which powers nuclear reactions in both nuclear bombs and nuclear power plants. The 5% number represents the fraction of uranium in the fuel which is U-235 instead of U-238. Anything above 20% or so is considered "highly enriched", and nuclear bombs often have fuel which is 80-90% U-235.
Re:US regulators will certify first small nuclear reactor de... by gambiting on Saturday July 30, 2022 @07:15PM (#32291336)
And the reason why bombs have more of the U-235 is because is splits easier than U-238, so it's easier to end up with a self sustaining chain reaction, where every U-235 that splits produces enough neutrons to split off two more U-235 atoms, which in turn splits 4, then 8, then 16 and so on - the chain reaction splits the whole lot all at once and you've got a bomb.
Re:US regulators will certify first small nuclear reactor de... by WatchDog on Saturday July 30, 2022 @11:30PM (#32292879)
To add to what other commenters have said, apart from the weapons proliferation issues, enriching uranium is very expensive. U-235 only makes up about 0.72% of natural uranium, the rest of it being U-238. Running a reactor on low enriched uranium is much more cost effective, although reactor designs that can run on LEU can be less safe, like Chernobyls RBMK design.
Re:US regulators will certify first small nuclear reactor de... by mikewarot on Saturday July 30, 2022 @05:11PM (#32290371)
>I never understood the argument nuclear power is so "dangerous".

Oil companies paid to form that opinion in the public.

>no Chernobyl

Chernobyl was the result of a HIGHLY unauthorized, and stupid experiment... phenomenally stupid. So many red flags were driven past at high speed.

Re:US regulators will certify first small nuclear reactor de... by czstar on Saturday July 30, 2022 @05:26PM (#32290501)
I believe you are wrong about the causes of the Chernobyl disaster. The consensus these days is that it was due to poor reactor design.
Re:US regulators will certify first small nuclear reactor de... by ComputerGuru on Saturday July 30, 2022 @06:47PM (#32291142)
It was poor reactor design combined with downright stupid actions by management. But a nuclear plant should be somewhat stupid-proof.
Re:US regulators will certify first small nuclear reactor de... by MichaelCollins on Saturday July 30, 2022 @07:04PM (#32291255)
For whatever it's worth, Russia continues to operate several RBMK reactors today, and haven't blown any of them up since Chernobyl in the 80s. This is probably attributable to some combination of the retrofits they made after Chernobyl, generally treating the matter more seriously, and maybe luck.

https://en.wikipedia.org/wiki/RBMK#List_of_RBMK_reactors

Re:US regulators will certify first small nuclear reactor de... by ncmncm on Saturday July 30, 2022 @10:38PM (#32292647)
Retrofits have not generally occurred. The person most personally responsible was given control of another one.
Re:US regulators will certify first small nuclear reactor de... by MichaelCollins on Sunday July 31, 2022 @12:43PM (#32296762)
The retrofits did occur. The second sentence of your comment does not relate to the first; 'retrofit' does not mean "change in management"
Re:US regulators will certify first small nuclear reactor de... by ncmncm on Sunday July 31, 2022 @10:30PM (#32301258)
We know at least some retrofits were done.
Re:US regulators will certify first small nuclear reactor de... by XorNot on Saturday July 30, 2022 @06:45PM (#32291126)
That's taking a blameless post-mortem approach which is a valid tool, but not the entire answer.

The reality is to cause the issue, the operators had to drive the reactor well into a dangerous and hard to control regime which it would not get into under any normal operation circumstance.

So while yes, it shouldn't have been physically possible to do it, even with that design it took substantial, deliberate malfeasance to get that result (you can also only get that result with that design - a meltdown is not normally an explosion).

Re:US regulators will certify first small nuclear reactor de... by czstar on Saturday July 30, 2022 @07:55PM (#32291592)
From what I’ve read some of the safety systems did not give real-time feedback and the critical error occurred because the operators didn’t know they were in trouble due to lack of real-time feedback. I’m not an engineer and know nothing of these things but the test was not unauthorized and it wasn’t an experiment. As far as I read about the accident.
Re:US regulators will certify first small nuclear reactor de... by baobabKoodaa on Saturday July 30, 2022 @06:38PM (#32291072)
Many causes can be attributed to the disaster.
Re:US regulators will certify first small nuclear reactor de... by Spooky23 on Saturday July 30, 2022 @07:29PM (#32291426)
The Navy also fostered a strong safety culture with top down controls to get there, and they did so before anti-nuclear sentiment was a thing.
Re:US regulators will certify first small nuclear reactor de... by ncmncm on Saturday July 30, 2022 @07:38PM (#32291477)
Civil nukes have never had any strong safety culture. The emphasis has always been on cost-cutting, because nukes have always been too expensive to compete fairly in an open market.

Every nuke, ever, has been massively subsidized.

NuScale has been and is still being massively subsidized by the USDoE. It would be wholly uncompetitive with renewables if not so propped up.

Re:US regulators will certify first small nuclear reactor de... by spopejoy on Saturday July 30, 2022 @09:49PM (#32292383)
> NuScale has been and is still being massively subsidized by the USDoE

Given the longstanding cozy relationship between the NRC, the DOE and industry it's hard to feel confident in this approval being sufficiently stringent, e.g. on worst-case scenarios, waste disposal and the like.

Re:US regulators will certify first small nuclear reactor de... by justinclift on Saturday July 30, 2022 @05:48PM (#32290694)
Re:US regulators will certify first small nuclear reactor de... by dirkt on Sunday July 31, 2022 @04:45AM (#32294270)
There is a difference between a nuclear reactor blowing up in a country with low overall population density (e.g. the US; in Chernobyl also it wasn't that taxing to designate an exclusion zone for a few centuries), it happening in a very densely populate country (where it would be a desaster), or it happening in a military sub where the owning state doesn't care about collateral damage [1]

[1] https://www.theguardian.com/world/2014/jun/19/us-depleted-ur...

Re:US regulators will certify first small nuclear reactor de... by m463 on Saturday July 30, 2022 @05:22PM (#32290473)
exactly, especially when you read wikipedia's article on energy density:

  material      specific energy w*h/kg
  -----------   ----------------------
  uranium       22,394,000,000
  ...
  diesel fuel           12,666
Re:US regulators will certify first small nuclear reactor de... by Gibbon1 on Saturday July 30, 2022 @10:35PM (#32292634)
Solar panel is like 800,000 wh/kg
Re:US regulators will certify first small nuclear reactor de... by runarberg on Saturday July 30, 2022 @05:10PM (#32290364)
I don’t think the US military is a positive example of safe usage of nuclear. First the Hanford nuclear site in Washington is one of the most polluted site in the entire state. The cleanup effort is the regions biggest employer and is costing the local communities, the state, and the federal government millions of dollars every year.

The Bikini Atoll in the Marshall islands is one of the most polluted places in the pacific ocean. The US military conducted nuclear testing around there and simply swept the pollution in one place. There are dozens of reports of cancer from both former military personnel an nearby local population. And concerns are rising with elevated sea level that pollution will be leaking at greater pace then currently.

These are just two examples of the US military neglecting safety concerns with their nuclear technology. There is no single spectacular event like the Chernobyl disaster. But rather decades of neglect and disregard to public safety which polluted many areas leaving potentially an overall damage on par—and potentially greater—then the Chernobyl disaster.

Re:US regulators will certify first small nuclear reactor de... by MichaelCollins on Saturday July 30, 2022 @06:38PM (#32291069)
It's not the US Military generally that is held up as an example of nuclear safety, it's specifically the US Navy's track record for operating nuclear reactors. Hanford was a big mess, but that wasn't run by the Navy. Bikini Atoll was bad, but that wasn't caused by a mistake operating a nuclear reactor.

Your supposition that reactor accidents smaller than Chernobyl might be hidden from the public doesn't seem well grounded either; we know the US Army fucked up the operation of the SL-1 reactor, resulting in 3 deaths. Here's a big list of nuclear fuckups: https://en.wikipedia.org/wiki/List_of_military_nuclear_accid... Some of those severe, some minor. I don't see much reason to believe that substantial naval reactor incidents have been omitted from that list. Such accidents are hard to hide from long, particularly if it means a bunch of sailors got irradiated or a ship had to be taken out of service for decontamination / repair. The incidents on that list bracket the sort of mystery accident you're supposing; it lists accidents much less severe and much more severe.

Re:US regulators will certify first small nuclear reactor de... by runarberg on Saturday July 30, 2022 @11:29PM (#32292876)
> Your supposition that reactor accidents smaller than Chernobyl might be hidden from the public doesn't seem well grounded either.

I supposed no such thing. You don’t need an accident to leave a mess (as evidenced by our current climate crisis). You just need to be negligent of the environment and surrounding population center. The US military (including the Navy) has a terrible track record when it comes to environmental issues around its military bases around the world. My supposition is that they are simply equally inconsiderate with their nuclear logistics as they are with their other operations. And Bikini Atoll is my ground for thinking so.

Re:US regulators will certify first small nuclear reactor de... by musiciangames on Sunday July 31, 2022 @04:30AM (#32294213)
That list of military nuclear accidents was interesting. My impression is that the rate of accidents dropped off quickly over time. Maybe the military got better at handling nuclear material? Maybe some other explanation?
Re:US regulators will certify first small nuclear reactor de... by titzer on Saturday July 30, 2022 @05:22PM (#32290474)
You're saying that nuclear testing produces a lot of radioactive fallout? Yeah, it does. This is absolutely not the same thing as operating a nuclear reactor.
Re:US regulators will certify first small nuclear reactor de... by runarberg on Saturday July 30, 2022 @05:36PM (#32290577)
Hanford had nuclear reactors.

But that is despite the point. Their safety record with nuclear is horrendous. Full of examples of neglect and pollution. I’m not an expert in the nuclear history of the US military, but I wouldn’t be surprised that many of their smaller reactors have similar stories as Hanford. It is just not as spectacular—and therefor not as much in the public consciousness—as Chernobyl.

Re:US regulators will certify first small nuclear reactor de... by smegger001 on Saturday July 30, 2022 @06:32PM (#32291028)
yes they had reactors that were shutdown clear back in the 70s for being to old of design.
Re:US regulators will certify first small nuclear reactor de... by smegger001 on Saturday July 30, 2022 @06:25PM (#32290975)
Hanafords mess dates back to the manahatten project and processed uranium and plutonium for fat man and little boy. the 1940s was a long fucking time ago. and when have learned a lot since then and technology has advanced. the testing in Bikini atoll was awful but has nothing to do with nuclear power its about weapons testing which is a entirely unrelated issue and we stopped doing that.
Re:US regulators will certify first small nuclear reactor de... by spopejoy on Saturday July 30, 2022 @10:01PM (#32292460)
> the 1940s was a long fucking time ago

And yet we're still cleaning it up :)

> In 2007, the Hanford site represented 60% of high-level radioactive waste by volume managed by the US Department of Energy and 7–9% of all nuclear waste in the United States (the DOE manages 15% of nuclear waste in the US, with the remaining 85% being commercial spent nuclear fuel). Hanford is currently the most contaminated nuclear site in the United States and is the focus of the nation's largest environmental cleanup.

https://en.m.wikipedia.org/wiki/Hanford_Site

Re:US regulators will certify first small nuclear reactor de... by c3534l on Saturday July 30, 2022 @05:19PM (#32290443)
Same reason people are afraid of getting robbed at night when they're more common during the day when everyone is at work, or why we're scared of heights and planes, but cars and horseback riding don't phase us. Fear is an emotional reaction, not a rational one.
Re:US regulators will certify first small nuclear reactor de... by idontwantthis on Sunday July 31, 2022 @05:46AM (#32294462)
I’m not sure what you mean by “battleships”, but the US navy is definitely not mostly nuclear. Super carriers and most subs yes. Everything else (many, many vessels) are not.
Re:US regulators will certify first small nuclear reactor de... by nradov on Saturday July 30, 2022 @04:21PM (#32289930)
Only a small fraction of the US Navy's fleet is nuclear powered, specifically just the submarines and carriers. Their last battleships were decommissioned many years ago, and those were all conventionally powered. The Navy did build a few nuclear powered surface warships decades ago, but that was largely a failure due to high costs and operational limitations; they don't plan to build any more.
Re:US regulators will certify first small nuclear reactor de... by indymike on Saturday July 30, 2022 @05:32PM (#32290546)
What really killed the CGNs (nuclear powered destroyers) was VLS (vertical launch system) and AEGIS - the sensor suite that newer Navy destroyers and cruisers are built around. CGNs were all built around magazine fed rail-style missile launchers, and sensors were all designed when state of the art was a transistor. Refitting ships to modern sensors like AEGIS and modern VLS was almost a complete rebuild. Even early Ticonderoga class conventionally powered cruisers (CGs) that had rail launchers were retired early because of the cost of refit to VLS.

Incidentally, VLS allows for much faster deployment of missiles, and doesn't require deck space for different launchers for different missiles, and a ship with a modern VLS have a huge rate-of-fire advantage on older rail launcher equipped ships.

Re:US regulators will certify first small nuclear reactor de... by DougWebb on Saturday July 30, 2022 @06:40PM (#32291095)
That may have been the reason for mothballing the old ship designs, but why weren't the new ones nuclear powered? That seems to be independent of the missile launcher design.
Re:US regulators will certify first small nuclear reactor de... by indymike on Saturday July 30, 2022 @08:40PM (#32291883)
Three reasons:

* Cost of procurement.

* Role of the ship: why have an expensive ship that turns into a radioactive reef in a role when one of its missions is to "take a bullet" for a carrier?

* No competition. The Soviets were gone.

Re:US regulators will certify first small nuclear reactor de... by nradov on Saturday July 30, 2022 @08:20PM (#32291757)
Mainly for cost reasons, plus nuclear reactors also take up more space and can't accelerate quite as rapidly compared to modern gas turbines. If the Navy ever decides to build a new cruiser class to replace the old Ticonderogas then it might be worth considering nuclear propulsion, but realistically the budget just isn't there to make it happen. The Navy can barely afford to provide enough qualified crew for their existing few nuclear vessels.
Re:US regulators will certify first small nuclear reactor de... by chihuahua on Saturday July 30, 2022 @04:15PM (#32289886)
I agree in principle, but I am not aware of any nuclear powered battleships. Iowa class BBs have steam turbines running on fuel oil.
Re:US regulators will certify first small nuclear reactor de... by MichaelCollins on Saturday July 30, 2022 @04:38PM (#32290059)
Not battleships, but America did have several nuclear powered cruisers which lasted around 15-30 years (but all were decommissioned in the 90s.) They weren't battleships, but that term is sometimes used colloquially to refer to any surface warship other than carriers.

https://en.wikipedia.org/wiki/Nuclear-powered_cruisers_of_th...

Re:US regulators will certify first small nuclear reactor de... by mLuby on Saturday July 30, 2022 @05:50PM (#32290714)
> but that term [battleships] is sometimes used colloquially to refer to any surface warship other than carriers

Really? I wouldn't be surprised to hear someone call a frigate a cruiser or a littoral combat ship a destroyer or an amphibious assault ship a carrier but everyone knows battleships are the biggest big-gun ships out there.

Re:US regulators will certify first small nuclear reactor de... by MichaelCollins on Saturday July 30, 2022 @06:13PM (#32290881)
I think so, at least for some people who don't have an interest in military stuff or machines generally. Similar to the way any armored but unarmed truck may sometimes be called "a tank." (https://duckduckgo.com/?t=ffab&q=police+tank&iax=images&ia=i...)

I try not to judge, I'm probably equally wrong without knowing it about things as far outside my area of interest.

Re:US regulators will certify first small nuclear reactor de... by kelnos on Saturday July 30, 2022 @11:56PM (#32293027)
I would not be surprised if many people who don't have knowledge of naval vessels would use "battleship" as a generic term for "surface naval vessel". A possible driver of this could be the "Battleship" game.

I would also not be surprised if there were many people who'd never heard the terms "destroyer" or "cruiser".

Re:US regulators will certify first small nuclear reactor de... by josephcsible on Sunday July 31, 2022 @12:07AM (#32293085)
But the "Battleship" game has five different kinds of ships, only one of which it calls a battleship, and it does include cruisers and destroyers.
Re:US regulators will certify first small nuclear reactor de... by implements on Sunday July 31, 2022 @02:37AM (#32293717)
“Warship” would be the correct colloquialism, I think - battleships were specifically characterised by heavy armour and large caliber guns.
Re:US regulators will certify first small nuclear reactor de... by jamiek88 on Saturday July 30, 2022 @07:14PM (#32291332)
Does the USA even have a battleship?

I thought they were obsolete.

Re:US regulators will certify first small nuclear reactor de... by MichaelCollins on Saturday July 30, 2022 @08:10PM (#32291695)
They're obsolete. There was some debate in the 90s and 00s over whether they should be kept around since they had an incredible amount of firepower and some people still thought that maybe contested beach landings were a good idea. But ultimately they were stricken from the Navy and are now museum ships.
Re:US regulators will certify first small nuclear reactor de... by shawabawa3 on Saturday July 30, 2022 @04:28PM (#32289989)
He's technically correct. All zero of the US navy's battleships are nuclear powered
Re:US regulators will certify first small nuclear reactor de... by chihuahua on Saturday July 30, 2022 @09:00PM (#32292035)
The best kind of correct!
Re:US regulators will certify first small nuclear reactor de... by squidlogic on Saturday July 30, 2022 @04:24PM (#32289957)
Correct me if I’m wrong haven’t Iowa class battleships all been decommissioned sometime in the early 1990s?
Re:US regulators will certify first small nuclear reactor de... by jasonwatkinspdx on Saturday July 30, 2022 @05:24PM (#32290490)
Yes, and it was a colossal waste of money keeping them running even that long. Realistically they should have been scrapped in the period after the Korean war.
Re:US regulators will certify first small nuclear reactor de... by ncmncm on Saturday July 30, 2022 @07:43PM (#32291513)
It has been proposed that the reason the battleships were in Pearl Harbor was so they would be the ships sunk when the Japanese attacked. The aircraft carriers were all far out to sea.

Whether this is true, it shows that the obsolescence of battleships (since aircraft carriers came on line) was recognized well before WWII.

Re:US regulators will certify first small nuclear reactor de... by pfdietz on Saturday July 30, 2022 @09:29PM (#32292256)
Pearl Harbor converted the US in the Pacific from a 17 knot navy to a 25 knot navy.

We did get five of the eight battleships back (although some were basically cored out like a rotten tooth and rebuilt almost from scratch.) Two ships were left there (Utah and Arizona). Oklahoma was raised mostly to free up its slot in the harbor, but sank in 1947 while being towed to San Francisco Bay to be scrapped.

The BB's role in the Pacific War was as AA platforms and for shore bombardment.

Re:US regulators will certify first small nuclear reactor de... by frozenport on Saturday July 30, 2022 @04:24PM (#32289963)
aircraft carriers?
Re:US regulators will certify first small nuclear reactor de... by MichaelCollins on Saturday July 30, 2022 @04:49PM (#32290163)
All of America's supercarriers have been nuclear powered since the USS Kitty Hawk was decommissioned in 2009.

But if you include "amphibious assault ships" like the Wasp class, which can carry a lot of helicopters and STOVL airplanes like the F-35B and Harrier, then US Navy still has a lot of conventional powered carriers.

Re:US regulators will certify first small nuclear reactor de... by andbberger on Saturday July 30, 2022 @04:58PM (#32290255)
we really oughta let the navy run the power grid
Re:US regulators will certify first small nuclear reactor de... by NavinF on Saturday July 30, 2022 @05:21PM (#32290462)
My libertarian knee jerk reaction was “fuck that”. But then again, it can’t possibly be worse than PG&E so... sure why not.
Re:US regulators will certify first small nuclear reactor de... by collinmanderson on Sunday July 31, 2022 @01:33PM (#32297106)
Yeah, they should get vehicle-to-grid capability.
Re:US regulators will certify first small nuclear reactor de... by hutrdvnj on Saturday July 30, 2022 @04:12PM (#32289862)
I think if Chernobyl happens on the open sea, then it's not very dangerous, but if you imagine nuke aircraft crashes in dense populated areas.
Re:US regulators will certify first small nuclear reactor de... by bobthepanda on Saturday July 30, 2022 @04:38PM (#32290063)
The military has a much lower bar for safety though, given all the incidents around chemical poisonings and pollution like soldiers getting exposed to Agent Orange in Vietnam or burn pits in Iraq and Afghanistan.
Re:US regulators will certify first small nuclear reactor de... by mwattsun on Saturday July 30, 2022 @04:48PM (#32290148)
The Nuclear Navy has an extremely high bar for safety, hence no nuclear accidents. Unlike the Air Force apparently, which sometimes loses hydrogen bombs. Go Navy!

https://www.google.com/search?q=air+force+lost+hydrogen+bomb...

Re:US regulators will certify first small nuclear reactor de... by MichaelCollins on Saturday July 30, 2022 @04:52PM (#32290198)
The US Navy has fumbled a few nuclear bombs too (from airplanes and also submarines), their impeccable safety record is for nuclear reactors specifically. They've lost two nuclear powered submarines, but neither of those was due to reactor problems.
Re:US regulators will certify first small nuclear reactor de... by formerkrogemp on Saturday July 30, 2022 @05:09PM (#32290355)
It's harder to lose your metaphorical nuclear fuel tank than your metaphorical nuclear bullet I guess.
Re:US regulators will certify first small nuclear reactor de... by gpm on Saturday July 30, 2022 @08:15PM (#32291724)
The nuclear navy has had numerous nuclear accidents, just like the air force. Also just like the air force they have avoided any spectacular meltdowns so far, but that doesn't mean they've been problem free.

I collected a list of publicly known ones in response to someone claiming the same previously here: https://news.ycombinator.com/item?id=28376137

Re:US regulators will certify first small nuclear reactor de... by trasz on Saturday July 30, 2022 @07:00PM (#32291236)
Navy has an extremely high bar for safety according to Navy itself, but accidents sometimes get classified for a couple of decades. It happened before, https://en.m.wikipedia.org/wiki/Hanford_Site for example.
Re:US regulators will certify first small nuclear reactor de... by spopejoy on Saturday July 30, 2022 @09:56PM (#32292430)
The Hanford site is a horror show of the reality of how the US handles decommissioned nukes:

> The DOE later found water intruding into at least 14 single-shell tanks and that one of them had been leaking about 640 US gallons (2,400 l; 530 imp gal) per year into the ground since about 2010. In 2012, the DOE also discovered a leak from a double-shell tank caused by construction flaws and corrosion in the tank's bottom, and that 12 other double-shell tanks had similar construction flaws. ... Intermittent discoveries of undocumented contamination have slowed the pace and raised the cost of cleanup.

> In 2007, the Hanford site represented 60% of high-level radioactive waste by volume managed by the US Department of Energy[7] and 7–9% of all nuclear waste in the United States (the DOE manages 15% of nuclear waste in the US, with the remaining 85% being commercial spent nuclear fuel). Hanford is currently the most contaminated nuclear site in the United States and is the focus of the nation's largest environmental cleanup.

Re:US regulators will certify first small nuclear reactor de... by Manuel_D on Saturday July 30, 2022 @04:44PM (#32290112)
And yet despite they lower bar, there have been no nuclear accidents. Perhaps the NRC's bar for nuclear safety is needlessly high. A realistic safety regime needs to weight the risk of accidents with the immense risks of continued carbon emissions.
Re:US regulators will certify first small nuclear reactor de... by tragictrash on Saturday July 30, 2022 @04:42PM (#32290096)
The military has a lower bar for taking responsibility for those it views as disposable.
Re:US regulators will certify first small nuclear reactor de... by kylemh on Saturday July 30, 2022 @04:43PM (#32290101)
does that not simply further the point of the post you responded to?

despite lower standards, they've had no incidents

Re:US regulators will certify first small nuclear reactor de... by jmyeet on Saturday July 30, 2022 @06:16PM (#32290908)
> I never understood the argument nuclear power is so "dangerous".

The Chernobyl absolute exclusion zone is quite literally 1000 square miles. Nuclear advocates try to treat Chernobyl (and Fukushima and [insert nuclear disaster here]) as an irrelevant outlier rather than what it is: tangible evidence of the impact of inevitable human failure.

A plant has to be well-maintained and competently run. Waste products have to be safely stored and transported. As soon as you add corporations to the mix, you've now created a profit motive to neglect safety and maintenance because the risk of disaster is low but the failure modes are incredibly large. Humans have shown themselves to consistently be incredibly bad at managing low-probability high-impact failures.

> The US navy has fielded nuclear reactors in warzones since 1954 and no Chernobyl.

Military use of nuclear reactors is quite limited, being largely limited to a handful of submarines and aircraft carriers using highly enriched fuel. It's not done out of economic merit either. Having a nuclear missile submarine that can stay deployed for months can literally be done no other way.

All that has very little to do with commercial power generation.

Re:US regulators will certify first small nuclear reactor de... by wskinner on Saturday July 30, 2022 @07:39PM (#32291484)
Nuclear power has the lowest deaths per unit of power of all commercial power generation methods [1]. The externalities of nuclear power are highly visible and concentrated in a small physical and temporal range. This makes them obvious and scary. The externalities of other power generation methods are diffused through time and space, to the point that they appear mundane if they are noticed at all.

Coal power kills 1000x as many people per unit as nuclear. Natural gas kills 40x as many. Solar kills 4x as many. Humans have shown themselves to consistently be incredibly bad at comparing chronic and acute risks at scale. 1: https://www.engineering.com/DesignSoftware/DesignSoftwareArt...

Re:US regulators will certify first small nuclear reactor de... by pfdietz on Saturday July 30, 2022 @09:32PM (#32292276)
> Solar kills 4x as many.

I dispute this number. Are you considering roof mounted residential solar? Most solar in a solar-powered world will be on the ground.

Re:US regulators will certify first small nuclear reactor de... by opo on Sunday July 31, 2022 @03:19AM (#32293886)
This does likely include roof mounted residential solar.

>Most solar in a solar-powered world will be on the ground.

It is probably more accurate to say that most solar in a solar-powered world should be on the ground. The reality is that roof-top solar is the most expensive form of power in the world and yet it continues to be heavily subsidized. These subsidies are in the form of direct tax breaks and usually higher electricity prices paid by those who can't install it. A dollar wasted on roof-top solar would be MUCH better spent on solar panels installed on the ground by the utility.

Re:US regulators will certify first small nuclear reactor de... by kwere on Sunday July 31, 2022 @10:47AM (#32295861)
solar panels arent born in nature and dont degrade biologically. also consider output by scale. most of heavy production occur in xinjiang where there isnt a safety culture, installations are anothoer issue. btw the data on solar is understimated for sure due to chinese data quality

https://www.statista.com/statistics/494425/death-rate-worldw...

Re:US regulators will certify first small nuclear reactor de... by jmyeet on Saturday July 30, 2022 @09:44PM (#32292345)
> Nuclear power has the lowest deaths per unit of power of all commercial power generation methods

This is a poor metric to use. The official death count from Chernobyl was 31. It may be as high as 50. There are probably more deaths attributable through long-term effects, etc but you start getting into subjective modeling to figure out a number for that.

It's almost 40 years later and the absolute exclusion zone is still 1,000 square miles. Treating this as only 31 (or 50) deaths grossly under-represents the magnitude of the disaster.

Re:US regulators will certify first small nuclear reactor de... by wskinner on Saturday July 30, 2022 @10:47PM (#32292690)
This fairly thorough analysis comes up with a higher estimate of around 300-500 [1]. Of course, deaths per unit of energy is not the only meaningful metric, and it ignores the environmental impact that you mention. But have you considered the environmental impact of using fossil fuels for energy?

1: https://ourworldindata.org/what-was-the-death-toll-from-cher...

Re:US regulators will certify first small nuclear reactor de... by pfdietz on Saturday July 30, 2022 @09:56PM (#32292433)
Chernobyl is estimated to cause 27,000 fatal cancers in the larger population. You can't dismiss these just because they can't be directly demonstrated. Technology regulation is not criminal law; the technology doesn't have to be shown guilty beyond reasonable doubt.
Re:US regulators will certify first small nuclear reactor de... by jmyeet on Sunday July 31, 2022 @01:24AM (#32293403)
You realize that supports my argument, right?

The comment I was replying to was arguing nuclear power caused the least deaths and I was explaining how that's a bad metric because it doesn't capture the impact and damage of the absolute exclusion zone.

So if the actual death count is 27,000 instead of 31 or 50 that's actually much worse, which further undermines that commenter's argument.

Re:US regulators will certify first small nuclear reactor de... by pfdietz on Sunday July 31, 2022 @08:59AM (#32295217)
I should have written "one can't" rather than "you can't". Sorry that I implied something personal.
Re:US regulators will certify first small nuclear reactor de... by worik on Saturday July 30, 2022 @08:20PM (#32291765)
> > I never understood the argument nuclear power is so "dangerous".

I would add:There are none so blind as those who will not see

https://en.wikipedia.org/wiki/Lists_of_nuclear_disasters_and...

Very long list. Impossible to clean many up in any sort of human scale.

Re:US regulators will certify first small nuclear reactor de... by kwere on Sunday July 31, 2022 @10:53AM (#32295905)
i advise to look up at hiroshima and nagasaki today, or even look at wildlife in chernobyl no-go zone. obviously some dangers are bigger (and leave permanent scars) but technologies have progressed by far and wide. deaths/damages by fossil fuels are more sneaky. the "world" 40 years ago made a bad decision letting go of nuclear energy, wich will haunt the world for generations to come
Re:US regulators will certify first small nuclear reactor de... by Aerroon on Saturday July 30, 2022 @09:20PM (#32292195)
>A plant has to be well-maintained and competently run. Waste products have to be safely stored and transported. As soon as you add corporations to the mix, you've now created a profit motive to neglect safety and maintenance because the risk of disaster is low but the failure modes are incredibly large.

When are we outlawing hydroelectric dams? Accidents with those have killed far far more people.

Re:US regulators will certify first small nuclear reactor de... by jmyeet on Sunday July 31, 2022 @01:36AM (#32293465)
Here are the 3 big problems with the pro-nuclear argument:

1. Using deaths as a metric;

2. Focusing on operational cost of a nuclear power plant rather than total cost (ie including capital cost). The total cost is borne out in the relatively high cost of nuclear power to users. If that point is even acknowledged, let alone conceded, it's just dismissed as the fault of government regulation or that scale will somehow magically solve the problem; and

3. Writing off disasters as irrelevant outliers because they're inconvenient to the argument. Less than 700 nuclear power plants have been built and we've had multiple huge disasters.

So are deaths a bad metric? And by "deaths" here I mean any form of the metric (eg absolute, per-kWh generated, etc). Because deaths doesn't capture the negative externalities and consequences of nuclear power. Chernobyl killed less than 100 directly. Who knows how many contracted various cancers in a wide area. But 1,000 suqare miles of land remains uninhabitable nearly four decades later with no real end in sight.

Deaths as a metric doesn't capture that, which is precisely why pro-nuclear advocates focus on it. Nuclear power has its own propaganda just like the oil and gas industry does.

Re:US regulators will certify first small nuclear reactor de... by pfdietz on Sunday July 31, 2022 @10:11AM (#32295591)
The nuclear stans' focus on deaths may not be leading in the direction they want.

The way to account for the cost of deaths is by the "statical value of a human life", a finite quantity that is considered what would be reasonable to spend to avoid one death. The NRC uses a figure of $9 million when evaluating reactor safety systems.

Using that figure, deaths in normal operation contribute negligibly to the cost of energy from nuclear or renewables (but not for coal; there deaths contribute greatly to the real cost.) Because of this, if nuclear stans are focusing on deaths, what they're doing is implying that the $9 M figure is much too low. And that would imply that the NRC is not imposing enough safety systems on nuclear plants. I doubt this last point is one they'd be happy with.

Re:US regulators will certify first small nuclear reactor de... by spookie on Saturday July 30, 2022 @07:36PM (#32291465)
I agree, but it's not like nation states do a better job than private entities... I mean, you gave an example yourself.
Re:US regulators will certify first small nuclear reactor de... by MisterMower on Saturday July 30, 2022 @10:46PM (#32292686)
1000 square miles is a square 32 miles long or a circle 36 miles in diameter. The size of an average county in the US Midwest.

So if you’re that worried about it, find the least populated place in western Kansas or Nevada or Maine and build the biggest plant you can. Worst case scenario it turns into Chernobyl and you fence it off and call it a day.

Alternatively, we can keep using slave labor in China to build solar panels fabricated with toxic compounds obtained via strip mining that require natural gas and coal power plants to actually function on hot days.

Either you care about climate change or you just hate nuclear power. Discussions like these are great at revealing where folks stand on the issue when push comes to shove.

Re:US regulators will certify first small nuclear reactor de... by rtpg on Saturday July 30, 2022 @11:31PM (#32292883)
Alright, you find the county to be declared a no-mans land. Remember, you need a bunch of staff to run the plant, a source of water for the cooling towers, and of course you need to spend all that money actually building the plant. Let's not get into the fact that the primary reason people don't build nuclear power plants is that they're extremely expensive to build in the first place!

A serious question I don't have an answer to: is Chernobyl the worst-case scenario? Is there a way for there to be an even worse disaster? I do not know.

Though really we can walk and chew bubble gum. Build reactors and more renewables. I can't put a nuclear reactor on the roof of my home after all! I just really feel like this trope that anti-nuclear sentiment is why we don't have nuclear reactors everywhere has always felt weird when we're talking about market-based economies. Maybe it's just that unworkable in general! Why else would we not build these supposed money printers?

Re:US regulators will certify first small nuclear reactor de... by MisterMower on Sunday July 31, 2022 @02:21AM (#32293653)
More renewables requires more slave labor from China. If we produced those solar panels here under US environmental and labor regulations, nuclear would be very competitive. That we have to buy them from China for solar power to even make remote economic sense here in the US should tell us something.

A counter question to yours: How many Chinese slave laborers would you tolerate before you'd accept another Chernobyl style disaster as a tradeoff? When you talk about substituting solar power for nuclear power, that's exactly the tradeoff you're making.

Re:US regulators will certify first small nuclear reactor de... by rtpg on Sunday July 31, 2022 @06:02AM (#32294512)
I don't think that solar panel enthusiasm has to answer for the cross-sector near-universal effect of outsourcing of industrial production outside of the US, for Americans.

According to a google search:

> American-made solar panels generally cost from $0.50 to $0.80 per watt (W) – about $0.10 to $0.30 more per watt than imported panels. The highest quality, ‘premium’ American panels may even come in around $1.00/W.

I would be more than happy to pay that premium (though really I would like to see working conditions improve across the globe). I do not live in the US so my calculus is perhaps different from yours.

I have heard statements about labor being huge factors of solar panel installation, but google is saying 15%.

And I would like to restate that I think we can walk and chew bubble gum here. The problems with nuclear being more expensive are real, maybe resolvable, but cannot simply be handwaved away in our current economic models. But hey, if we can get a good mix going on I'm all for it. It's not an either/or!

And hey, if we had a full planned economy, there would be a lot of things that we could do differently that would also have great effects.