The most enduring image of the Fukushima disaster is of emergency crews desperately using firehoses to spray cooling water high over the walls of the containment shell...which had been blown to smithereens by an internal hydrogen explosion. This of course, was largely futile considering that MOST of the water sprayed in simply flowed out the broken walls and into the ocean. Strangely enough, it appears that NOTHING has been learned from this practical lesson as the new AP1000 reactors being built in America still use this above ground design...instead of securing the reactor core 100 ft undergound in a natural pit that can hold more than enough cooling water in the event of a disaster. Please Register or Log in to view the hidden image! Please Register or Log in to view the hidden image!