Tokyo Electric Power Company says temperatures in Reactor 4 fuel pool shot up again,  this after they injected almost 200 tons of water before the weekend.  TEPCo will try injecting more water on 25 April.  Reactor 4 fuel pool seems to be losing water faster than they can put it in.  They are concerned the building is too damaged to inject anymore water.

TEPCo also says that Fukushima Daiichi’s Reactor 1 is more damaged than thought.  They believe that 70% of  Reactor 1’s fuel rods are damaged, and they are having trouble maintaining water levels.  They have been injecting water at a rate of 6 tons per hour.  TEPCo wants to try building a new heat exchanger building, to cool the water they are injecting.  In fact TEPCo is having major problems keeping all the reactors cool.