March 16th – Reactor 2 Explosion – Fires in Reactor 4 – Onagawa NPS levels 6.1 uSv/h

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From: Wegner, Mary
Sent: Wednesday, March 16, 2011 7:19 AM
To: Beasley, Benjamin
Subject: From NISA

1. Nuclear Power Stations (NPS)
o Fukushima Dai-ichi NPS
– TEPCO evaluated that core damage of Unit 2 is “less than 5%” (22:14 March 14th)
* Water level in RPV in Unit 2 was decreasing. (22:50 March 14th)
* There was a sound of explosion in Unit 2. As the pressure in Suppression Chamber decreased, there was possibility that an incident occurred in this Chamber. (06:20 March 15th)
– The fire at Unit 4 occurred. Fire extinguishing work was underway. (09:38 March 15th)
o Fukushima Dai-ni NPS
– Continue to remove the residual heat by Residual Heat Removal System (RHR) in Unit 1,2,3 and 4 (02:00 March 15th)
– Cold shut down of Unit 4 was confirmed (07:15 March 15th)
o Onagawa NPS
. Readings of monitoring post indicats 6.1 micro Sv/h. (07:00 March 15th)
o Tokai
– Cold shut down was confirmed. (00:40 March 15th)


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