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Re:United States Discloses Nuclear Warhead Numbers; Restores... by FredPret on Monday July 22, 2024 @06:49PM (#41040655)
Max warheads = 31k

Current warheads = 3.7k

I wonder how long a nuke in storage lasts - ie, how much work does it take to maintain a stockpile of x nukes, and if you can turn those swords into ploughshares relatively easily.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by openasocket on Monday July 22, 2024 @07:19PM (#41040845)
I think it’s shorter than you would imagine. I recall an episode of the podcast Arms Control Wonk talking about the nukes in possession of Ukraine during the collapse of the Soviet Union. Professor Lewis stated that those warheads likely had a service life of 5-10 years. But that may be specific to those Soviet warheads, and I think that different components need to be replaced at different intervals.
Re:United States Discloses Nuclear Warhead Numbers; Restores... by philipkglass on Monday July 22, 2024 @07:10PM (#41040791)
It takes quite a bit of work to maintain nuclear warheads. All active US weapons contain plutonium 239, which has a half life of 24,100 years. It's radioactive by alpha decay, which leads to changes in the material properties due to energetic collisions and the buildup of microscopic helium bubbles (alpha particles are merely ionized helium nuclei, so stopped alpha particles become helium). Since the US stopped testing actual nuclear warheads in the early 1990s, it takes a great deal of indirect theoretical and experimental evidence to make sure that nuclear warheads are reliable without live fire tests. That's part of "stockpile stewardship." [1] If the plutonium has deviated too far from its original mechanical behavior, it would need to be removed from warheads, purified, and remanufactured into replacements that match the original specs. And again, the rebuilt components need to be reliable but they can't actually be tested via explosion.

US weapons also rely on tritium gas "boosting" to operate reliably and efficiently [2], and tritium decays with only a 12.3 year half life. The gas reservoirs of weapons need their tritium replaced at significantly shorter intervals. Even manufacturing enough tritium to maintain the stockpile has become a challenge because the US has retired its Cold War era weapons-material reactors that used to operate at Hanford and Savannah River. Currently the US uses a power reactor owned by the Tennessee Valley Authority to make tritium for weapons [3].

It's possible to make nuclear weapons (even thermonuclear weapons) with only uranium 235 for fissile material and no stored tritium. Such weapons could last a much longer time without active maintenance, since U-235 decays thousands of times slower than Pu-239. However, they would be larger and heavier for the same explosive yield, which complicates delivery. They would also lose certain safety features. Finally, without being able to perform full scale tests, it is doubtful that the US would have the confidence to replace its current high-maintenance weapons stockpile with a new generation of low-maintenance weapons.

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

[2] https://nuclearweaponarchive.org/Nwfaq/Nfaq4-3.html#Nfaq4.3....

[3] https://www.wvlt.tv/2022/05/24/watts-bar-lone-source-nuclear... "Watts Bar lone source of a nuclear weapon material; TVA increasing production"

Re:United States Discloses Nuclear Warhead Numbers; Restores... by bamboozled on Monday July 22, 2024 @07:50PM (#41041039)
I really wonder what the state of Russia's nuclear arsenal is like then? Better or worse? Maybe that still have a lot of the old Nuclear power stations running to better supply the materials to maintain their warheads ?
Re:United States Discloses Nuclear Warhead Numbers; Restores... by danielodievich on Monday July 22, 2024 @08:38PM (#41041362)
This is a frequent topic of discussion in various forums and I am sure by Very Serious People in Charge [TM].

Extrapolating from the general sad state of the weapon systems in use by Russians where they are at this point unpacking tanks made in 1950, the quality of maintenance on their vehicles, and is difficult to plausibly claim that all the ancient rusty USSR stuff across the strategic rocket barrier is in any sort of usable shape.

Now, if an order to launch is given, some rockets may launch, some of those may actually fly, some of those flying actually get somewhere, and perhaps some of THOSE may actually detonate should they reach the target, and maybe if you're lucky at the designed yield. The percentages in that funnel that aren't known. And nobody [perhaps except some crazies] wants to find them out because even one in the middle of big city is enough.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by hollerith on Monday July 22, 2024 @09:16PM (#41041589)
>difficult to plausibly claim that all the ancient rusty USSR stuff across the strategic rocket barrier is in any sort of usable shape.

There is no more ancient rusty USSR stuff -- at least in the Kremlin's strategic nuclear arsenal:

https://news.ycombinator.com/item?id=41041532

Re:United States Discloses Nuclear Warhead Numbers; Restores... by bamboozled on Monday July 22, 2024 @11:11PM (#41042160)
Without evidence, that comment is an opinion piece. Hopefully we never have to find out.
Re:United States Discloses Nuclear Warhead Numbers; Restores... by hollerith on Monday July 22, 2024 @11:27PM (#41042243)
Could it be that the source of your skepticism is the fact that you have over the last 2 years seen many comments here on HN asserting that Russia's military is probably incapable of maintaining an effective strategic nuclear capability whereas my comment is the first one you've seen that takes the opposite position?

According to one comment I saw here a few weeks ago, Russia's nukes are probably made of wood.

I suggest searching the web for "Russian nuclear weapons modernization", restricting yourself to credible news outlets.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by bamboozled on Tuesday July 23, 2024 @07:04AM (#41044722)
Still feels like an opinion, as the other commenter said, look at the state of their equipment when going against Ukraine, there is little indication their nukes or their silos, bombers are much better except your opinion.

Opinions are fine, but the evidence against your opinion is currently stronger.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by hollerith on Tuesday July 23, 2024 @10:05AM (#41046162)
When credible news organizations repeat Russian claims that they've completed a modernization of their strategic nukes then years and years go by with no expert or credible source (that I have noticed) contradicting the Russian claims, that is evidence. Who besides the Russian military might know about the state of Russia's stockpile? Spies for one. And until 2022 US nuke experts regularly inspected all Russian strategic nuclear sites per the START 3 treaty. They probably weren't able to disassemble any warheads as part of their inspections, but there's a lot you can learn merely by, e.g., measuring the gamma rays produced by the warhead.

Also, you do realize that Russia is currently winning in Ukraine -- in part because they have an equipment advantage over Ukraine? E.g., the glide bombs they recently developed have proven effective.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by racional on Tuesday July 23, 2024 @11:15AM (#41046856)
Also, you do realize that Russia is currently winning in Ukraine

They are not "currently winning". By any objective measure, the war on the ground is currently a stalement.

Only problem is that in the long term -- stalemates never work out for the occupiers.

In Russia's case: If the situation continues as it does, and moving at the glacial pace that it does, and draining 10 percent of its GDP every year -- they will ultimately have to give up on their optional neocolonial adventure, pick up their toys and go home.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by rainworld on Tuesday July 23, 2024 @05:36PM (#41051208)
>By any objective measure, the war on the ground is currently a stalement.

By any objective measure it is a war of attrition where for almost one year only one side has had meaningful advances.

>stalemates never work out for the occupiers.

Yeah, don’t bother justifying that. What actually almost never works out is a smaller country winning a war of attrition against a (much) bigger opponent.

BTW, did you catch Zelensky talk about (not) ceding 30% of territory the other day? That’s quite a bit more than the four oblasts plus Crimea. He knows where this is going.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by racional on Tuesday July 23, 2024 @06:11PM (#41051505)
Only one side has had meaningful advances.

That's not true, as Ukraine has scored significant non-territorial advances (like forcing most of the occupier's fleet to retreat from Crimea) in the same time frame.

Also you're setting an arbitrary time window of 1 year (when if we want to evaluate the conflict meaningfully, we need to look at how things are moving now compared to the start of the conflict. Which is definitely not the outcome Russia intended. And ignoring Russia's considerable losses in achieving the paltry gains that it has (which are very much part of the attrition equation), etc.

What never works out is a smaller country winning a war of attrition against a (much) bigger opponent.

You're missing the point -- the smaller country doesn't need to "win" the war of attrition (in terms of effecting a complete reversal) in order to win the conflict. It just needs to outlast the occupier. For which there are no end of precedents in history, recent and ancient. Including (ironically) the U.S. withdraw from Afghanistan, which is apparently what gave Putin the gigantic (for him) hard-on that inspired him to sign his country for the same inevitable fate in the first place (but with much higher cost and KIA/WIA rates to his people along the way).

Did you catch Zelensky the other day? He knows where this is going.

I don't see any significance to that quote.

But it does seem pretty clear which side you're cheering for, in any case.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by rainworld on Tuesday July 23, 2024 @07:18PM (#41052042)
>forcing [some] of the occupier's fleet to retreat from Crimea

Ah, then Ukrainians will be landing there any minute now. Liberating it and the whole coast. Now that they are patrolling the Black Sea again.

But, of course, they’re not and they’re not going to. Because it’s a sideshow that gives them no meaningful advantage. Except fodder for the fandom.

>arbitrary time window

Oh, you want to talk about how the Kontr went? How Ukraine burned its offensive potential in three months for nothing? How Russia has been on the offensive for ten months without slowing down, rather the opposite? You want to talk about how things are going right now?

>Which is definitely not the outcome Russia intended

Putler tried to force Ukraine to the table. That failed. Making Russian nationalists very happy.

>It just needs to outlast the occupier. >part of the attrition equation >effecting a complete reversal

Yeah, you simply do not understand what a war of attrition is. You don’t understand why the war is happening where it is.

You don’t understand that every day of war pushes Ukraine deeper into a hole it has no hope of ever getting out of. You don’t understand the cost of this war to Ukraine. You don’t want to and you’re not supposed to. It’s like a movie, a morality play. The only relevant concepts you were taught to understand are aggressor, victim and atrocity. The Good Guys always win In the End. In the meantime you get to watch people die and feel good about it. Doing Your Part.

The comparison with Afghanistan is infantile.

>I don't see any significance to that quote.

That comes later.

PS: I have a movie for you to watch: https://en.wikipedia.org/wiki/Atlantis_(2019_film)

Re:United States Discloses Nuclear Warhead Numbers; Restores... by hollerith on Tuesday July 23, 2024 @09:46PM (#41052894)
>But it does seem pretty clear which side you're cheering for

Whether Russia has the upper hand is an important question for deciding on what policies the NATO countries should pursue, but we cannot have a fruitful public discussion on the question if anyone giving evidence for one side of the question is shouted down as a traitor.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by racional on Wednesday July 24, 2024 @07:00AM (#41055668)
You can try having a fruitful discussion with them if you want to.

Based on the carefully worded sibling comment to yours - it would seem they have other goals in mind.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by rainworld on Wednesday July 24, 2024 @08:58AM (#41056624)
What other goals would that be?

>carefully worded

The Project 2025 promise: A Russian under every American bed.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by hollerith on Wednesday July 24, 2024 @12:09PM (#41058508)
Note that I'm replying to myself.

"shouted down as a traitor" does not get at the crux of the problem I see. The problem is that anyone who thinks as follows cannot form an accurate opinion about the likely outcome of the war:

Anyone who argues that Russia is winning the war is probably a Russia sympathizer, and a Russia sympathizer shouldn't be trusted and consequently we don't have to consider his argument.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by racional on Wednesday July 24, 2024 @02:59PM (#41060570)
It was more the "cutesy" (and fact-indifferent) way they were arguing their position (rather than the basic proposition what they were arguing) that suggested to me that something was off here. As confirmed by their subsequent posts. I'll withdraw the pro-Russia insinuation if you like (as whichever side, if any they may favor seems irrelevant in this context).

I've personally yet to encounter anybody who holds (or read any arguments in favor of the view) that Russia is outright winning this conflict in any tactical or operational sense, beyond perhaps a very marginal measure - without it becoming immediately clear that the person making them had major gaps in their knowledge, and/or strong biases (as revealed by reciting standard narratives as to the supposed causes of the war). Or without it emerging (as with the sibling commenter) that they just don't seem to give a fuck either way.

But this is of course a different topic.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by hollerith on Wednesday July 24, 2024 @06:35PM (#41062939)
Professor of international relations John Mearsheimer claims that Russia is winning and that consequently Ukraine and NATO are in a pickle. The 60 seconds or so after this timestamp is a relevant quote:

https://youtu.be/vk0pSQtGb0g?si=NdoH3hHR-RJanp-R&t=431

Re:United States Discloses Nuclear Warhead Numbers; Restores... by racional on Thursday July 25, 2024 @07:20AM (#41067238)
Claims, without making a substantive argument.

Mearsheimer is a prime example of someone way too ideologically biased and beholden to broken narratives to be taken seriously.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by danielodievich on Thursday July 25, 2024 @12:13PM (#41070367)
One thing I'll agree on John Mearsheimer is that an incredibly well articulated. He's also absolutely wrong. One of my also russian friends used one of his videos as a proof that everything is west's fault in the conflict in Russia. I patiently listened and what I heard was might makes right/who are we to meddle in the affairs of great Russia or great powers/Russia is great and we're doomed. It's a take that takes ANY agency out of Ukraine or any small country. Catnip for Z-patriots!. He's one of those "useful idiots" that Putin and his gang cultivate around the world.

For just a bit of - at the glance similar - but much, much more thought out and balanced stuff, I would recommend anything at all by Steven Kotkin. He speaks with folks from Brookings quite a bit. His experience is unparalleled and world view is considerably more nuanced

Re:United States Discloses Nuclear Warhead Numbers; Restores... by 542354234235 on Thursday July 25, 2024 @07:28AM (#41067293)
One of the top results from a very reputable source. The title says it all. "Russia’s Nuclear Modernization Drive Is Only a Success on Paper"

https://carnegieendowment.org/russia-eurasia/politika/2024/0...

Re:United States Discloses Nuclear Warhead Numbers; Restores... by IAmGraydon on Tuesday July 23, 2024 @04:59PM (#41050780)
>Now, if an order to launch is given, some rockets may launch, some of those may actually fly, some of those flying actually get somewhere, and perhaps some of THOSE may actually detonate should they reach the target, and maybe if you're lucky at the designed yield. The percentages in that funnel that aren't known.

I think you're likely wrong about that last part. I would be willing to bet that certain US 3-letter agencies know very well what the percentages in that funnel are. It's clearly enough that the west is careful about direct confrontation with Russia.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by danielodievich on Wednesday July 24, 2024 @03:18PM (#41060788)
So very timely, reading The Economist from last week https://www.economist.com/europe/2024/07/16/russias-vast-sto... (https://archive.is/Z9j7Y no paywall). I'd definitely trust The Economist over most anything on this kind of research.

Some choice quotes: "Vladimir Putin has the old politburo to thank for the huge stockpiles of weapons that were built up during the cold war"

"Russia’s ability to build new tanks or infantry fighting vehicles, or even to refurbish old ones, is hampered by the difficulty of getting components. <...> The lack of high-quality ball-bearings is also a constraint."

"They [military firms] also largely depend on machine tools imported years ago from Germany and Sweden, many of which are now old and hard to maintain."

Given that the country has no ability to produce ball bearings - and in other news, even nails, and can only cast gun barrels in single digits on western equipment, consider me HIGHLY skeptical that any rocket modernization that was supposed to have transpired has gleaming ready to fly stuff. More likely the money was "razpil" (разпилено) - literally "sawn off".

Still, lets hope we don't have to find out

Re:United States Discloses Nuclear Warhead Numbers; Restores... by GJim on Tuesday July 23, 2024 @04:51AM (#41044031)
> I really wonder what the state of Russia's nuclear arsenal is like then?

Does it matter?

The thing about a nuclear *deterrent* is that it doesn't have to work. There just has to be a realistic possibility that (at least some of it) it might.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by Loughla on Monday July 22, 2024 @07:27PM (#41040890)
How do you know all this? Is that a hobby or a job?
Re:United States Discloses Nuclear Warhead Numbers; Restores... by philipkglass on Monday July 22, 2024 @07:39PM (#41040963)
It's a hobby. I read a lot and I have enough formal education to digest primary sources (mostly; my highest qualification is auditing a neutronics course while in grad school).

If you too would like to know way more about nuclear weapons than is useful in civilian life, I'd recommend reading:

Richard Rhodes, The Making of the Atomic Bomb

The nuclear weapons FAQ, authored by Carey Sublette, a hobbyist researcher who is extraordinarily dedicated to understanding nuclear weapons from declassified documents and physical principles: https://nuclearweaponarchive.org/Nwfaq/Nfaq0.html

Anne C. Fitzpatrick's dissertation Igniting the Light Elements: The Los Alamos Thermonuclear Weapon Project, 1942-1952: https://www.osti.gov/biblio/10596

The Arms Control Wonk blog/podcast: https://www.armscontrolwonk.com/

Nuclear historian Alex Wellerstein's blog Restricted Data: https://blog.nuclearsecrecy.com/

The nuclear weapons subreddit, particularly posts on it authored by Alex Wellerstein, Carey Sublette, and a few others whose names currently escape me: https://old.reddit.com/r/nuclearweapons/

Chuck Hansen's book "U.S Nuclear Weapons: The Secret History" (out of print, sadly; will have to pay $$$ or find a scanned pirate copy) and his massive book/PDF "The Swords of Armageddon" available for purchase here: http://www.uscoldwar.com/

Re:United States Discloses Nuclear Warhead Numbers; Restores... by MengerSponge on Monday July 22, 2024 @08:25PM (#41041276)
Let me add "Inventing Accuracy" to your list of recommended reading. It's fascinating, and it's a powerful microscope to reveal the relationship between strategic need and technological development

https://mitpress.mit.edu/9780262631471/inventing-accuracy/

Re:United States Discloses Nuclear Warhead Numbers; Restores... by topspin on Tuesday July 23, 2024 @05:28PM (#41051124)
> it is doubtful that the US would have the confidence to replace its current high-maintenance weapons stockpile with a new generation of low-maintenance weapons

That's peace time thinking. Little Boy was detonated over Hiroshima without ever having performed a full scale test of the design. Our knowledge and modeling capabilities today are more than sufficient to produce and stockpile a new design that is guaranteed to work -- without testing an actual weapon -- if that somehow became necessary.

There are many reasons why a nuclear power such as the US is unlikely to consider doing this, but lack of confidence in weapon design or manufacture is not among those reasons.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by nulltxt on Monday July 22, 2024 @07:02PM (#41040731)
https://www.youtube.com/watch?v=N2OUzBrLEFk is a interesting video about the transport of these weapons
Re:United States Discloses Nuclear Warhead Numbers; Restores... by mikewarot on Monday July 22, 2024 @07:07PM (#41040772)
Plutonium pits slowly transmute, and the emitted alpha particles are trapped and form helium bubbles. They have to be replaced periodically.
Re:United States Discloses Nuclear Warhead Numbers; Restores... by wdh505 on Monday July 22, 2024 @07:13PM (#41040808)
I think the tritium "preignition" has to be replaced every 10 years.
Re:United States Discloses Nuclear Warhead Numbers; Restores... by jmyeet on Monday July 22, 2024 @07:42PM (#41040977)
So this varies depending on what kind of nuclear weapon is and the delivery system.

The major deterrant is the LGM-30G Minuteman III [1]. Most of our rockets use liquid propellants. Since the alert window is under 10 minutes, you can't keep a liquid-fuelled rocket permanently fueled so the Minuteman was developed as a solid rocket fuel booster.

There's a whole team responsible for maintaining the boosters and warheads of this first line of defense [2].

But there are a variety of other systems. Some dropped by strategic bombers, others on mobile launchers, shorter range missiles deployed in Europe (eg MRBMs in Turkey), nuclear weapons deployed on submarines and so on. Also you have a mix of types. AFAIK the US was moved away from highly-enriched uranium weapons in favor of plutonium. Or at least, HEU reactors have shut down. Maybe there's a sufficient stockpile? Also, a lot of these weapons will be thernonuclear so you have to worry about the production and storage of tritium. IIRC a lot of tritium is a byproduct of plutonium production.

Maintaining a significant nuclear arsenal is actually really complex and expensive.

[1]: https://en.wikipedia.org/wiki/LGM-30_Minuteman

[2]: https://minutemanmissile.com/missilemaintenance.html

Re:United States Discloses Nuclear Warhead Numbers; Restores... by sitharus on Monday July 22, 2024 @08:19PM (#41041228)
> you can't keep a liquid-fuelled rocket permanently fueled so the Minuteman was developed as a solid rocket fuel booster.

You absolutely can! The Soviet doctrine was to use storable liquid propellants in their ICBMs - typically unsymmetrical dimethylhydrazine (UDMH) as the fuel and nitrogen tetroxide as the oxidiser. I don’t know if they need the fuel/oxidiser replaced periodically but that combination is storable for over a decade.

The US went with solid rockets as they are more reliable - no turbines or valves etc - at the expense of performance, but the US perfected making large solid rockets before the USSR. The USSR however perfected oxidiser-rich staged combustion which extracted a lot more performance.

Storable liquid propellants are still used on satellites and deep space missions that need to perform large course corrections during their missions.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by lmm on Monday July 22, 2024 @07:49PM (#41041025)
> Since the alert window is under 10 minutes, you can't keep a liquid-fuelled rocket permanently fueled so the Minuteman was developed as a solid rocket fuel booster.

Huh? The Titan II was developed to do precisely that and worked that way for decades, they were liquid-fuelled and kept fuelled in their silos.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by openasocket on Monday July 22, 2024 @08:13PM (#41041195)
Liquid propellants are generally less stable than solid fuel. I had read in multiple places (from reputable sources) that you generally couldn’t keep liquid missiles permanently fueled like that. The propellants are extremely corrosive and dangerous.

But you are right that the Titan II is liquid fueled and was kept permanently fueled in the silo. I’m not entirely sure how to resolve those two facts. The Wikipedia page about the Titan II does mention multiple accidents and fatalities related to propellant leaks, so I’m guessing that they were just more risky to operate?

Re:United States Discloses Nuclear Warhead Numbers; Restores... by silverquiet on Monday July 22, 2024 @08:18PM (#41041226)
There was an incident where a technician dropped a large socket down a silo that impacted the side of a Titan missile and set off a chain of events that ended in an explosion that nearly detonated a nuclear bomb on US soil.
Re:United States Discloses Nuclear Warhead Numbers; Restores... by sillywalk on Tuesday July 23, 2024 @12:16AM (#41042433)
The Damascus Incident[0]. There's a book called Command and Control: Nuclear Weapons, the Damascus Accident, and the Illusion of Safety by Eric Schlosser that details the incident, and a PBS based on the book about it.

[0] https://en.wikipedia.org/wiki/1980_Damascus_Titan_missile_ex...

Re:United States Discloses Nuclear Warhead Numbers; Restores... by knappe on Tuesday July 23, 2024 @01:42AM (#41042872)
I was hoping this book would be a recommended. It really, really focused, reinforced is really not the right word to use here, my views on nuclear weapons.

This should be required reading.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by mr_toad on Monday July 22, 2024 @08:37PM (#41041357)
The main problem with traditional liquid fuelled rockets is keeping the propellant cold. It’s not feasible to keep a rocket with liquid oxygen fuelled for long periods. The Titan missiles use hypergolic fuel which is more storable, but also extremely toxic and volatile. More than 50 people have been killed in accidents involving this rocket.
Re:United States Discloses Nuclear Warhead Numbers; Restores... by justin66 on Monday July 22, 2024 @11:02PM (#41042118)
It helps if you think of liquid-fueled rockets relying on cryogenics as something entirely different than those using hypergolics. Cryogenics can't sit there for a long time but hypergolics can.
Re:United States Discloses Nuclear Warhead Numbers; Restores... by sillywalk on Tuesday July 23, 2024 @01:38AM (#41042855)
Forgive me if you meant all of your comment historically.

> Most of our rockets use liquid propellants.

Which ones? As far as I know the US only has solid fuel nuclear armed missiles. The Minuteman and the Trident.

> others on mobile launchers, shorter range missiles deployed in Europe (eg MRBMs in Turkey),

The US only has aircraft dropped bombs in Europe. The US retired their nuclear capable rockets and cruise missiles under the INF treaty in 1988. They retired their nuclear artillery etc at the end of the Cold War.

The (liquid fuelled) Jupiter missiles were removed from Turkey in 1962 after the Cuban missile crisis, in exchange for the USSR removing their nukes from Cuba, though there are still US nukes in Turkey.

> Also, a lot of these weapons will be thernonuclear

All of them are.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by jiggawatts on Monday July 22, 2024 @07:08PM (#41040776)
> how long a nuke in storage lasts

Decades, certainly. All but the first few generations of bombs were designed for long periods of storage.

Notably, many of the TOP500 supercomputers were built with the singular goal of simulating the ageing of nuclear weapons in storage.

If a supercomputer is owned by the DoE or SANDIA, then that's what it is for.

> turn those swords into ploughshares relatively easily.

Yes! Cold-war era warheads from both the Soviet Union and the US have been used as nuclear fuel. A notable one was the Megatons to Megawatts program: https://en.wikipedia.org/wiki/Megatons_to_Megawatts_Program

The plutonium in bombs is essentially "super high grade" reactor fuel. Even degraded after decades in storage it is still far, far better than what is typically used. It just needs to be converted into the MOX (metal oxide) fuel pellets and then used in a reactor, pretty much as-is.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by dekhn on Monday July 22, 2024 @07:51PM (#41041048)
While many supercomputers were funded by stockpile stewardship, the goal was to produce high performance computers capable of a wide range of simulation needs.

One good example would be NERSC at LBL- it's unclassified research only, and their series of supercomputers were never intended to simulate ageing nuclear weapons.

Hard to say exactly what goes on in the classified supercomputers, but they certainly weren't spending much of their time simulating aging nuclear weapons- that was the ostensible reason.

Re:United States Discloses Nuclear Warhead Numbers; Restores... by hollerith on Monday July 22, 2024 @09:07PM (#41041532)
>I wonder how long a nuke in storage lasts

Russia's nuclear stockpile -- at least the strategic warheads -- have all been built anew since the end of the Cold War. The US is also modernizing its stockpile in the same way, but it has not finished yet.

"built anew": made with all new components except that the fissile material is recycled from an old Cold-War-era warhead. (They probably re-cast and re-machine the fissile material.)

The reader might be asking, How can Russia, a poor country, afford that? Well, nukes aren't that expensive once you have the fissile material and the design and manufacturing expertise and infrastructure. The pay for the soldiers to guard the nukes and constantly be on the ready to launch them is more expensive, according to one report I saw recently (and Russia has low personnel costs).