https://en.wikipedia.org/wiki/Chernobyl:_Consequences_of_the...
No, it did not. That water was drained, precisely because of concerns that it would melt down and come into contact with water.
If it wasn't close, as you suggest, then why did a crew of people wade into highly radioactive water -- a probable suicide mission -- to manually operate the valves to drain the water?
> That water was drained, precisely because of concerns that it would melt down and come into contact with water.
Even if the concrete base under the reactor was breached, the water underneath had been drained. In retrospect this was unnecessary, but it added another layer of precaution.
Furthermore, what makes you think a potential explosion after coming into contact with water would be "massively" worse than the original reactor explosion? In case you aren't aware, the RBMK-1000 was a water cooled reactor. The explosion happened because the temperatures inside became so high that the pressure vessel ruptured. By comparison, the contact with the water beneath the reactor hall would not be trapped in a pressure vessel and wouldn't result generate such pressure.
What actually produced the most amount of nuclear contamination was the period of time when the fuel rods were exposed to atmosphere and burned. This put large amounts of contaminants - radioactive smoke, essentially - into the atmopshere.
However, it's not just Andrew Leatherbarrow who thinks so. All it takes is a simple Google search and you'll find reputable research papers hosted by the IAEA whose primary conclusion is that the accident could have been much worse. Here's one example: https://inis.iaea.org/search/search.aspx?orig_q=RN:18009127
I did not say that the IAEA paper was about molten rods hitting the coolant water. There is more than one way that Chernobyl could have been much much worse. According to the paper, different wind and rainfall could have made the disaster 200-400x worse in terms of radiation consequences to humans. To say that is significantly worse would be an understatement.
> Popular books have the incentive to garner sales - often through dramatization - not report accurate findings.
It seems like you've made up your mind and no amount of evidence to the contrary will change it. I don't think I'll bother to continue participating in this line of discussion.
This is a common myth (probably recently propagated by the scare-mongering TV series), but that mission was perfectly safe. Three men, equipped with dos meters, waded into the water and opened a valve, that was it. One died of a heart attack at 65 and the other 2 are still alive.
Furthermore, the operation was in the end unnecessary: there was no risk of such an explosion.
I guess the point is that it doesn't matter; if you believe something to be a probable suicide mission, then you don't do it unless you are very afraid that a disaster will otherwise occur.
But then you also have to question if their assessment of the risk of further disaster was also correct. But I guess subsequent studies have confirmed that high level of risk?
To stop this, loads of sand, boron, and lead were piled onto the ruptured reactor, eventually burying it. The concern is that the molten fuel rods underneath this blanket of material would melt through the concrete below and come into contact with water. But with no pressure vessel to contain the boiling water, it would not produced nearly as much pressure as the original failure.
That line in the Wikipedia article seems to conflict with the book I read by Andrew Leatherbarrow "Chernobyl 01:23:40". In the book he states that if the water hadn't been drained and if the molten core had reached the water it "would have done unimaginable damage and destroyed the entire power station, including the three other reactors."
It's a shame that the Wikipedia article doesn't cite it's source on that claim. It would be interesting to reconcile the seemingly conflicting information.
And how, pray tell, would it have generated an explosion so large without a pressure vessel to build up pressure?
No nuclear plant built since Chernobyl will have an incident as bad as Chernobyl. Passive safety is a given now.
Your emotion-driven conservatism has to be weighed against the real harms caused by other viable baseline power systems. Advocacy against nuclear power is advocacy for fossil fuels, like it or not.
I think your choice in phrasing speaks more to your emotional state than mine.
> No nuclear plant built since Chernobyl will have an incident as bad as Chernobyl.
You are discounting the fact that many of the nuclear reactors that remain in operation today were designed decades ago and were built decades ago.
Of course newer nuclear technology is safer -- I don't think anyone would ever disagree with that. But we are considering the safety of nuclear power as it exists today. Why would we omit nuclear reactors that are currently in operation today (and will continue to be in operation for quite some time) from the discussion?
> But we are considering the safety of nuclear power as it exists today.
Even then, it's not a homogeneous blob of risk. There are different reactor designs, run by authorities of different competence levels, built at varying distances away from cities. There's no substitute for a case by case analysis.
I sense a hand-wavy aspect to the argument. I want some harder facts. What percentage of currently live reactors have an equal or greater risk than the Chernobyl plant? Is it 2% or 50%? Such distinctions make a big difference to the tail risk.
Current reactors are burner reactors. They cannot power the world (there is not enough sufficiently cheap uranium). To power the world, breeder reactors are needed.
Breeder reactors will burn the bred isotopes, either Pu isotopes or U-233. These isotopes, when fissioned, produce about half the delayed neutrons of U-235. As a result, reactors burning them are skating closer to the edge of prompt criticality than today's reactors. Chernobyl was a prompt criticality accident. A prompt criticality accident in a fast reactor (any breeder using Pu will be a fast reactor) is potentially much more serious than even Chernobyl.
Fukushima is older than Chernobyl. This type of thinking is how these catastrophes happen. People keep obsolete designs in operation for 50 years or more and basically make any safety gains today pointless.
"5 serious accidents in 60 years represents an actual historic global annual risk of 1/12 or 8.3% per annum" [2]
"If no cooling system is working to remove the decay heat from a crippled and newly shut down reactor, the decay heat may cause the core of the reactor to reach unsafe temperatures within a few hours or days, depending upon the type of core."
[1] https://en.wikipedia.org/wiki/Core_damage_frequency
[2] https://silo.tips/download/complexity-implies-unknowable-ris...
Oil, coal, gas, hydro, etc inflict casualties gradually and predictably. They are, generally speaking, not capable of the sudden region-wide catastrophic disasters that nuclear power is capable of. Those are rare events. The Poisson distribution, with regard to inflicting mass casualties, is completely different for nuclear power.
We haven't had a true nuclear catastrophe yet. We came close with Chernobyl and Three Mile Island, but those events were not nearly as bad as they could have been. The number of casualties could have been orders of magnitude higher.
In other words, our sample size with nuclear power is small. All it would take is one nuclear catastrophe and the safety stats averaged over the last century suddenly look much different.