APR: your source for nuclear news and analysis since April 16, 2010

Sunday, April 17, 2011

Fukushima Daiichi: No. 5 and 6

Right now we're looking at the voluminous material available on the TEPCO plan, and one thing just jumped out which is worth noting in a distinct post to itself:

The defueling plan for the reactors INCLUDES No. 5 and No. 6 reactors.

This is, to our knowledge, the first official indication that these two remaining undamaged plants will be defueled. Since we already reported here a while back on the decommissioning of Nos. 1 through 4 and the cancellation of Nos. 7 and 8 the fate of the two remaining reactor plants was up in the air... and this seems to be the proof that TEPCO will give up any future hope of nuclear power generation on the Fukushima Daiichi site.

We might add that the plan doesn't indicate if, or when, anything else will be done to No. 5 and No. 6 plants, including demolition. But I think we all know how this will end up.

8:30 AM Eastern Sunday 4/17


  1. if they defuel 5 and 6, then they have ready made cooling capacity and just have to pump out the trenches and recirculate. Separating oil and diesel from water must be fairly standard technology and since they only have about 800m3 a day to process it could probably be done via an existing fuel storage tank with very few modifications.

  2. Hmm. I'm not sure; the defuelling of 5 & 6 could be to allow a detailed inspection, as happened as Kashiwazaki-Kariwa. I personally think it would be immoral to shut down functional infrastructure of this sort. But you could well be right Will.

    AEJ, I don't think there's really a useful role that the pumps at units 5 & 6 can play in assisting the decomissioning of the other units. Certainly if your idea is moving fuel from other units into those two, the transfer is really only possible once the need for cooling has diminished to the point where the transfer is not useful.