the of the the inherent inherent characteristics of this or this type of reactor is not good i found wess night an article that i wrote nearly forty years ago describing an intense controversy in the united states a boat performance precisely of the so-called emergency cooling systems on water cooled reactors in the performance was criticized by independent experts in the us but the then nuclear establishment the us atomic energy commission waved the concerns aside and this was at a time when fukushima one was being built. and the same the same problem is inherent in this kind of reactor the only kind of reactor that anybody is building know anywhere in the world these reactors were originally built as power plants for submarines and obviously the overall overriding design criterion is that it has to be compact enough to fit inside the hull of a submarine that means that it has to produce an enormous amount of heat in a very small wall you. and the only way that you can do that is with very very high pressure water which means in turn that the walls of the reactor the boiler the reactor p