I know the general layout of various types of nuclear reactors.
But if the outer building which is supposed to contain everything else blows up - that's not exactly the best case is it?
But if the outer building which is supposed to contain everything else blows up - that's not exactly the best case is it?
You could think about the outer building as keeping the rain out, and possibly aeroplanes to some extent. It is not the critical last defence against stuff happening in the reactor, the containment building is. You can bet that the japanese army is keeping any possible threats out of there.
I also read that on TMI a similar hydrogen explosion occurred but it was contained by containment dome.