– Gov’t aims for ‘cold shutdown’ of Fukushima reactors, but bemoans lack of data (Mainichi Japan, Nov. 14, 2011):
At the No. 1, 2 and 3 reactors, melted nuclear fuel seems to be penetrating the pressure vessels and even leaking out from the reactor buildings.
At the No. 4 reactor, which has no nuclear fuel in the reactor itself, about 1,535 fuel rods — about three times the number of fuel rods at the No. 1, 2, and 3 reactors — are kept in the spent nuclear fuel pool. For this reason, TEPCO completed the work to sustain the fuel pool with steel frames in late July.
And if something happens to Reactor 4, …
… it is all over: