Well, after earthquake and tsuami, japan having problem with radiation and their power plant. The way that they are using now is cooling it down but it's seem that it noe working very well.
This problem have been tangling in my mind and I was thinking since they want to cool it down why don't theyb freeze it? Find a way to freeze it instantly, break it into small pieces and maintainence the freezing, at the mean time build a stronger vessel put the freezed substance back in the new vessel and let it melt natural and you can reused the substance again. I feel that logically this should work to reduce the radiation from spreading and rebuild the plant for used faster.
But how to freeze it instantly would be something we have to think about rather than throwing sea water. This could sound crazy but it might work and it's could reduce the damage to the environment. What ever gas substance can be condensed to fluid and fluid could be easily freeze than gas,I'm not sure if the one in the tank or vessel or fluid but freezing is a chance to reduce damage.
Really hope that this crisis could be over soon!