Some other details from NHK: There are 350 tanks. They are temporary structures designed to last 5 years. There are no water level gauges in the tanks so no one knew the water level was falling. They are now going to dispatch people to "patrol" the tanks looking for leaks.
They asked an expert, "if one tank is leaking, isn't it likely the seals are corroded and the others may soon leak?" He said: "Yes, exactly. That is what worries me." Oy veh! - Jed
