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Perché Chernobyl e Fukushima sono eventi separati 15.03.11

L'esperto di programmi di sviluppo nucleare, Mark Hibbs, spiega al Deutsche Welle perché Fukushima non può trasformarsi in un'altra Chernobyl.

So now we have the reactor shutdown generating heat from the hot fuel but no cooling systems. So that is the same basic scenario that we had in Three Mile Island.

That is not the same, by any means, as the accident at Chernobyl in 1986, where because the reactor had a completely different design, the physics of the reactor produced a power excursion and that led to an explosion of the reactor under conditions in which the reactor had no containment to withstand the pressure from the blast.

And we know what happened: a hole was blown out from the side of the reactor, and a large amount of the radioactive inventory from the fuel was propelled outside of the reactor building. That cannot happen here. These reactors are water-moderated. They're not graphite-moderated. There won't be any power excursion of this kind. That's just physically not possible.