March 11th, 2011 – Fukushima Daiichi Unit 1 not able to get to cold shutdown

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From: Dube, Donald
Sent: Friday, March 11, 2011 11:59 AM
To: Clark, Theresa; Ader, Charles; Lombard, Mark; Landry, Ralph; Donoghue, Joseph; Dreisbach, Jason; Lee, Samuel; McKirgan, John; Mrowca, Lynn; Segala,John
Subject: RE: Japan Update: Evacuations ordered around Fukishima

Ok, if I had to make an educated judgment call from all the reports, Unit 1 is in hot shutdown, possibly in a station blackout, but in either case is not able to get to cold shutdown, possibly because of either underground piping failure (emergency service water) from the earthquake or clogging from the mud and debris washed in from the tsunami; this mud clogging/piping failure is consistent with what appears to be common cause failures of the EDGs after one hour of running;

Don

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