
They don't store the dry casks in the reactor buildings, the casks are stored in the dry cask storage facility. Those 408 assemblies from a page or so back, of which 148 relate to #4, are contained in 9 dry casks, with those 9 dry casks then contained in the dry cask building, Please see:
www.nirs.org Page 9 has the 408, while pages 12 - 13 talk about the facility and the casks.(apologies if this has already been covered, but I've just been wading through a boatload of posts talking about 148 #4 assemblies and where they're being stored)
by Markfm 5/16/2011 4:55:38 PM

@pedro cardiac infraction
by elainekirk 5/16/2011 5:01:46 PM

@rob
translate.google.comApproval of the construction plan of Unit 4 Fukushima Daiichi Nuclear Power Station (additional spent fuel dry storage containers)
December 27, 2010
There's application dated October 22, 2010, pertaining to the expansion plans for the construction of spent fuel dry storage containers No. 4 Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Company, an Electricity Business Act, Article 47 Pursuant to the provisions of Section 12 to 27 approved 2010.
[Contact]
NISA
Division of Nuclear Safety Review ,3501 -6289 (direct)
by elainekirk 5/16/2011 5:02:21 PM

@pedro no I have always assumed it would take a big whack to have immediate effect and that problems are likely to show up in months or years
by elainekirk 5/16/2011 5:05:20 PM