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Depends on which problem you mean. Spraying water is irrelevant to the reactor cores, they are now pumping freshwater across pipes to cool those. For the cooling of the spent fuel ponds, spraying water does solve the problem, but a permanent way of pumping water across a heat exchanger would be desirable eventually, and of course a cover overhead, but first the wreckage would have to be removed for anything stable. I'm not sure what problem concrete would be supposed to solve – maybe it would block aerial fallout, but that only if cooling efforts are abandoned (both in the spent fuel pools and reactor cores) and all steam is let off first, but then you have complete meltdowns and a bigger problem underneath the reactor.

*Lunatic*, n.
One whose delusions are out of fashion.
by DoDo on Fri Apr 1st, 2011 at 06:20:53 AM EST
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