April 6th, 2011 – Japan just said there was a zirc fire in Unit 4 SFP. Did we know this? – Depends what is meant by “know.”

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From: Ruland, William
Sent: Friday, April 08, 2011 10:04 AM
To: Grobe, Jack; Leeds, Eric
Subject: RE: Dai-ichi

Depends what is meant by “know.”

– -O-ri-g-in al Message–•—
From: Grobe, Jack /YV6RVSent:
Friday, April 08, 2011 7:29 AM
To: Leeds, Eric; Ruland, William
Cc: Virgilio, Martin; Miller, Charles
Subject: Re: Dai-ichi

I now have heard that the explosion in Unt 4 was not hydrogen but possibly welding gas.

The bottom line is we are all speculating and we need the data/log books/interviews, etc.

Jack Grobe, Deputy Director, NRR

-Original Message —–
From: Leeds, Eric IV-V
To: Grobe, Jack; Ruland, William
Cc: Virgilio, Martin
Sent: Thu Apr 07 18:52:50 2011
Subject: RE: Dai-ichi

I did not. Was the RST/PMT aware?

Eric J. Leeds, Director
Office of Nuclear Reactor Regulation
U.S. Nuclear Regulatory Commission
301-415-1270

-Original Message—•-,
From: Grobe, Jack i
Sent: Wednesday, April 06, 2011 1:05 PM
To: Ruland, William; Leeds, Eric
Subject: Dai-ichi

Japan just said ther was a zirc fire in Unit 4 SFP. Did we know this??

Jack Grobe, Deputy Director, NRR

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