ML110960698

Email, Request for Additional Information, Relief Request (RR) C-6 & C-7 for Containment Spray Heat Exchanger and RR C-6 for Excess Letdown Heat Exchanger, Second 10-Year Inservice Inspection Interval

ML110960698
Person / Time
Site:	Comanche Peak
Issue date:	04/06/2011
From:	Balwant Singal Plant Licensing Branch IV
To:	Slough R Luminant Generation Co
Singal, Balwant, 415-3016, NRR/DORL/LPL4
References
TAC ME5215, TAC ME5216
Download: ML110960698 (1)

Text

From: Singal, Balwant Sent: Wednesday, April 06, 2011 3:02 PM To: Slough, Rob Cc: Hope, Timothy; Hicks, Jack

Subject:

Relief Requests C-6 and C Request for Additional Information (TACs ME5216 and ME5215)

By letters dated December 15, 2010 (Agencywide Documents Access and Management System (ADAMS), Accession Nos. ML103560593 and ML103560594), Luminant Generation Company, LLC (the licensee), submitted Relief Requests (RRs) C-6 and C-7 for Comanche Peak Nuclear Power Plant, Unit 1.

In order to complete its review of the licensees submittal, the U.S. Nuclear Regulatory Commission (NRC) staff has the following request for additional information (RAI).

Generic Question Pertaining to RRs C-6 and C-7

1. Please confirm that all examinations included in RRs C-6 and C-7 resulted in no indications, recordable or otherwise. If indications were found, please provide a full description of each indication.

RR C-7

2. Based on the precedent referenced in RR C-7 (Letter No. TXX-98170, dated July 22, 1998, RR C-9), weld TBX-2-1180-2-2 received a coverage of 73% for the First ISI Interval examination. Does RR C-7 apply to the same weld discussed in the RR C-9 (weld TBX-2-1180-2-2)? If so, please explain why the coverage for this inspection cycle was 41.47% as compared to the prior 73% coverage?

These RAIs were discussed with Mr. Rob Slough of your organization. Mr. Slough confirmed that a clarification conference call is not required and agreed to provide the RAI response within 30 days from the date of this e-mail.

Thanks.

Balwant K. Singal Senior Project Manager (Comanche Peak, and STP)

Nuclear Regulatory Commission Division of Operating Reactor Licensing Balwant.Singal@nrc.gov Tel: (301) 415-3016 Fax: (301) 415-1222