ML120610634
Letter Sequence Draft RAI | |
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Initiation Administration | |
MONTHYEARDCL-11-018, License Amendment Request 11-02, Revision to Technical Specification 3.7.1, Main Steam Safety Valves (Mssvs)2011-02-17017 February 2011
[Table View]License Amendment Request 11-02, Revision to Technical Specification 3.7.1, Main Steam Safety Valves (Mssvs) Project stage: Request ML1108706822011-03-28028 March 2011 Acceptance Review E-mail, License Amendment Request to Revise Technical Specification (TS) 3.7.1, Main Steam Safety Valves (Mssvs), to Remove a One-time Note from TS Table 3.7.1-1 Project stage: Acceptance Review ML1203704962012-02-0606 February 2012 Email, Request for Additonal Information, License Amendment Request to Revise TS 3.7.1, Main Steam Safety Valves Project stage: Other DCL-12-024, Response to NRC Request for Additional Information Regarding PG&E Letter DCL-11-018. License Amendment Request 11-02. Revision to Technical Specification 3.7.1. 'Main Steam Safety Valves (Mssvs)'.2012-02-27027 February 2012 Response to NRC Request for Additional Information Regarding PG&E Letter DCL-11-018. License Amendment Request 11-02. Revision to Technical Specification 3.7.1. 'Main Steam Safety Valves (Mssvs)'. Project stage: Response to RAI ML1206106342012-03-0101 March 2012 Email, Draft Request for Additional Information, License Amendment Request to Revise Technical Specification 3.7.1, Main Steam Safety Valves Project stage: Draft RAI DCL-12-065, Response to NRC Request for Additional Information Regarding PG&E Letter DCL-11-01B, License Amendment Request 11-02, Revision to Technical Specification 3.7.1. Main Steam Safety Valves (Mssvs).2012-07-0202 July 2012 Response to NRC Request for Additional Information Regarding PG&E Letter DCL-11-01B, License Amendment Request 11-02, Revision to Technical Specification 3.7.1. Main Steam Safety Valves (Mssvs). Project stage: Response to RAI ML12240A3222012-09-0707 September 2012 Summary of Audit to Review Calculations That Support License Amendment Request Related to Main Steam Safety Valves Project stage: Other 2012-02-06 |
ML120610634 | |
Person / Time | |
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Site: | Diablo Canyon ![]() |
Issue date: | 03/01/2012 |
From: | Joseph Sebrosky Plant Licensing Branch IV |
To: | Soenen P R Pacific Gas & Electric Co |
Sebrosky J M, NRR/DORL/LPL4, 415-1132 | |
References | |
TAC ME5713, TAC ME5714 | |
Download: ML120610634 (1) | |
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Text
From: Sebrosky, Joseph Sent: Thursday, March 01, 2012 3:11 PM To: Soenen, Philippe R Cc: Gall, Jennifer; Gardocki, Stanley; Billerbeck, John; Wang, Alan; Burkhardt, Janet; Lent, Susan; Baldwin, Thomas (DCPP)
Subject:
DCPP requested revision to TS 3.7.1, "Main Steam Safety Valves" draft request for additional information (Tac No. ME5713 and ME5714)
Philippe, By letter dated February 17, 2011 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML110480870), Pacific Gas and Electric Company (PG&E) submitted PG&E Letter DCL-11-018, "License Amendment Request 11-02, Revision to Technical Specification 3.7.1, 'Main Steam Safety Valves (MSSVs)." This request was later supplemented by letters dated April 21, 2011, and February 27, 2012. The staff has determined additional information is needed to complete our review. Below are draft requests for additional information regarding the license amendment request. Please let me know if you need a clarifying call before I issue them.
Sincerely, Joe Sebrosky Project Manager (Diablo Canyon Power Plant) Nuclear Regulatory Commission Division of Operating Reactor Licensing joseph.sebrosky@nrc.gov 301-415-1132
>>>>>>>>Draft RAIs>>>>>>>>>>>>>>>>>>>
The staff has reviewed PG&E's February 27, 2012, (ML12059A076) response and has the following questions related to the license amendment request.
- 1. Can PG&E provide the Crosby test data referenced in EPRI Report NP-4306-SR that supports a 5 psi max accumulation behavior for main steam safeties? 2. Can PG&E provide the Westinghouse evaluation that determines that the DCPP Dresser valves will perform in a similar manner? 3. Can PG&E provide an overview of the maintenance and test program for their MSSVs including inservice test history? 4. Because the EPRI report identified that a safety valve's performance may vary based upon the physical plant piping configuration, the staff requests the licensee evaluate the individual plant configuration in which the safeties are installed for an effect on the valve's performance.