ML120440294

Email, Request for Additional Information, Relief Request RR-ENG-3-06, Requirements for Leak Testing Boundaries of Class 1 Pressure-Retaining Components, Third 10-Year Inservice Inspection Interval (TAC ME7053-ME7054)

ML120440294
Person / Time
Site:	South Texas
Issue date:	02/13/2012
From:	Balwant Singal Plant Licensing Branch IV
To:	Harrison A South Texas
Singal, Balwant, 415-3016, NRR/DORL/LPL4
References
TAC ME7053, TAC ME7054
Download: ML120440294 (1)

Text

From: Singal, Balwant Sent: Monday, February 13, 2012 10:37 AM To: 'Harrison, Albon' Cc: 'Walker, Philip'

Subject:

Request for Additional Information (RAI) - Relief Request RR-EBG-3-06 (TACs ME7053 and ME7054)

By letter dated August 31, 2011 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML11250A169), STP Nuclear Operating Company (STPNOC, the licensee) requested relief from American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section XI Table IWB-2500-1 for leak testing boundaries of Class 1 pressure retaining components. To complete its review, the U.S. Nuclear Regulatory Commission staff needs the following additional information.

1. Please provide a more detailed description of the system leakage test that will be performed for each component group (test pressure and temperature, hold time, etc). In particular, for Component Groups 3, 4, and 5, your application states that the examination will be performed at a reduced test pressure. Please provide the pressure(s) that will be used for the test.

2. Has there been plant or industry operating experience of degradation of the subject segments by mechanisms such as stress corrosion cracking or fatigue?

Draft RAIs were transmitted on January 31, 2012. Mr. Phil Walker of STPNOC informed on February 13, 2012 that a clarification is not needed. Please treat this e-mail as formal request.

You are requested to provide your response within 30 days from the date of this e-mail.

Thanks.