March 13th, 2011 – Fukushima Daiichi Units 1 and 3 have experienced core damage – the reactor cores were completely uncovered for a period of time

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From: samuel hansellmailto] [) (6
Sent: Sunday, March 13, 2011 4:55 PM
To: Dean, Bill; Lew, David; Wilson, Peter; Roberts, Darrell: Collins, Daniel; Lorson, Raymond; Baker, Pamela;
Walker, Tracy; [email protected]; Clifford, James: Miller, Chris
Cc: Screnci, Diane; Sheehan, Neil; Trapp, James- McNamara, Nancy; Tifft, Doug; Dental, Glenn; Hansell,
Samuel; Hinson, Felicia; [email protected]
Subject: March 13, 2011, 3:00pm Japan Nuclear Facility Updates


Jim Trapp has arrived in Tokyo at the US Ambassador Office and has successfully provided a good source of current Japanese nuclear plant data. He has a scheduled meeting with Japanese officials in four hours to obtain additional information related to the status of the nuclear power plants.

Fukushima Daiichi Units 1 and 3 have experienced core damage; the reactor cores were completely uncovered for a period of time; reactor water level was restored on Unit 1.

Sea water injection is in progress on Unit 3, however there is no indication that the reactor water level is restored above the fuel zone level on Unit 3.

Fukushima Daiichi Unit 2 reactor condition has improved. DC electrical power has been restored and Reactor Core Isolation Cooling (RCIC) has restored water level to above the fuel zone.

Latest information has stated that the reactor vessel and primary containment structures are still intact for all of the nuclear units; there is intermittent venting of the primary containment (to the atmosphere) to maintain internal pressure within design limits.

The radiation readings on the US aircraft carrier Ronald Reagan was measured at 0.6 millirem; this radiation reading is consistent with the containment venting operation of the Fukushima reactors. (The US aircraft carrier Ronald Reagan is 100 miles off the coast of Japan)
Pages From ML12188A108 –16 Fukushima Daiichi Units 1 and 3 Have Experienced Core Damage – The Reactor Core…

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