ML13022A294

from Ed Knutson to Larry Doerflein: Re Ti 183 IR

ML13022A294
Person / Time
Site:	FitzPatrick
Issue date:	04/17/2012
From:	Knutson E NRC Region 1
To:	Doerflein L NRC Region 1
References
FOIA/PA-2013-0010, CR-JAF-2011-01529
Download: ML13022A294 (1)

Text

Doerflein, Lawrence From: Knutson, Ed Sent: Tuesday, April 17, 2012 4:21 PM To: Doerflein, Lawrence

Subject:

RE: TI-1 83 IR Backwards through the SBGT suctions in the reactor building (except the refuel floor). The lineup has the inlets to the SBGT trains closed, and then opens the vent/purge valves from the torus. I can send drawings and the procedure if you would like (drawings would take some time).

From: Doerflein, Lawrence Sent: Tuesday, April 17, 2012 2:13 PM To: Knutson, Ed

Subject:

RE: TI-183 IR Thanks - however that raises a new question. What's the path to vent form PC to secondary containment?

From: Knutson, Ed Sent: Tuesday, April 17, 2012 1:51 PM To: Doerflein, Lawrence

Subject:

RE: TI-183 IR CR-JAF-2011-01529 was initiated, "Based on review of INPO IER-1 1-1 recommendation 1 the following gap was identified: TSG-9 does not address hydrogen considerations during primary containment venting activities."

The corrective action was to change the procedure, Technical Support Guideline (TSG)-9, "Primary Containment Venting Without AC Power," to include in the considerations, "Venting primary containment to secondary containment is likely to be an irreversible action since it will result in discharge of steam and non-condensable gas (potentially containing fission products and hydrogen) to the reactor building creating an environment with severe thermal, radiological, and combustible/explosive conditions."

From: Doerflein, Lawrence Sent: Tuesday, April 17, 2012 1:20 PM To: Knutson, Ed

Subject:

TI-183 IR Ed, The IR discusses the licensee identified that current procedures did not address hydrogen considerations during primary containment venting.

Has that been fixed?

Larry