ML081610699

Request for Additional Information, License Amendment Request, Relocate Surveillance Frequencies to Licensee-Control Under Surveillance Frequency Control Program, (Risk-Informed TS Initiative 5B)

ML081610699
Person / Time
Site:	Diablo Canyon
Issue date:	06/13/2008
From:	Wang A NRC/NRR/ADRO/DORL/LPLIV
To:	Conway J Pacific Gas & Electric Co
Wang A, NRR/DORL/LPL4, 301-415-1445
References
TAC MD6994, TAC MD6995
Download: ML081610699 (4)

Text

June 13, 2008 Mr. John Conway Senior Vice President - Station Generation and Chief Nuclear Officer Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 770000 San Francisco, CA 94177-0001

SUBJECT:

DIABLO CANYON POWER PLANT, UNIT NOS. 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED TECHNICAL SPECIFICATION CHANGE TO RELOCATE SURVEILLANCE TEST INTERVALS TO A LICENSEE-CONTROLLED PROGRAM (RISK-INFORMED TECHNICAL SPECIFICATION INITIATIVE 5B) (TAC NO. MD6994 AND MD6995)

Dear Mr. Conway:

By letter dated October 15, 2007, Pacific Gas and Electric Company (the licensee) proposed technical specification (TS) changes for Diablo Canyon Power Plant, Unit Nos. 1 and 2. The proposed change would relocate the majority of surveillance frequencies to an owner-controlled document, subject to implementation of a Surveillance Frequency Control Program. The proposed change is an industry pilot of risk-informed TS initiative 5B.

The NRC staff has reviewed the October 15, 2007, amendment request and determined that we require additional information to complete our review. A request for additional information is enclosed. This request was discussed with Tom Grozan of your staff on June 3, 2008, and it was agreed that a response would be provided within 15 days of receipt of this letter.

If you or your staff has any questions concerning the resolution of this matter, please contact Alan B. Wang at (301) 415-1445.

Sincerely,

/RA/

Alan B. Wang, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323

Enclosure:

Request for Additional Information cc w/encl: See next page

ML081610699 (*) input memo OFFICE LPL4/PM LPL4/LA NRR/DRA/APLA/BC LPL4/BC NAME AWang GLappert: JBurkhardt for MRubin (*) THiltz DATE 6/11/08 6/10/08 5/1/08 6/13/08 REQUEST FOR ADDITIONAL INFORMATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION DIABLO CANYON POWER PLANT, UNITS NOS. 1 AND 2 DOCKET NOS. 50-275 AND 50-323 Pacific Gas and Electric Company (the licensee) requested to relocate the majority of surveillance frequencies to an owner-controlled document, subject to implementation of a Surveillance Frequency Control Program. The proposed change is an industry pilot of risk-informed technical specification (TS) initiative 5B. The Nuclear Regulatory Commission (NRC) staff has reviewed the October 15, 2007, amendment request and determined that we require the following additional information to complete our review:

1. Section 3.0 of your request identified the requirement, imposed by the NRC staff in its safety evaluation for document Nuclear Energy Institute (NEI) 04-10 for the implementation of risk-informed TS initiative 5B, to submit documentation with regard to probabilistic risk assessment (PRA) technical adequacy per the requirements of Regulatory Guide (RG) 1.200, Section 4.2. Please provide this information.

2. Section 3.0 of your request identified the requirement, imposed by the NRC staff in its safety evaluation for document NEI 04-10 for the implementation of risk-informed TS initiative 5B, to submit documentation with regard to:

(a) the quality characteristics of PRA models for which NRC-endorsed standards do not exist, per the requirements of RG 1.200, Sections 1.2 and 1.3, and (b) the justification for the methods to be applied for assessing the risk contribution for those sources of risk not addressed by PRA models.

Please provide this information.

ENCLOSURE

Diablo Canyon Power Plant, Units 1 and 2 (3/10/2008) cc:

NRC Resident Inspector U.S. Nuclear Regulatory Commission Diablo Canyon Power Plant 611 Ryan Plaza Drive, Suite 400 c/o U.S. Nuclear Regulatory Commission Arlington, TX 76011-8064 P.O. Box 369 Jennifer Post, Esq.

Avila Beach, CA 93424 Pacific Gas & Electric Company P.O. Box 7442 Sierra Club San Lucia Chapter San Francisco, CA 94120 ATTN: Andrew Christie P.O. Box 15755 City Editor San Luis Obispo, CA 93406 The Tribune 3825 South Higuera Street Ms. Nancy Culver P.O. Box 112 San Luis Obispo San Luis, Obispo, CA 94306-0112 Mothers for Peace P.O. Box 164 Director, Radiologic Health Branch Pismo Beach, CA 93448 State Department of Health Services P.O. Box 997414, MS 7610 Chairman Sacramento, CA 95899-7414 San Luis Obispo County Board of Supervisors Mr. James Boyd, Commissioner 1055 Monterey Street, Suite D430 California Energy Commission San Luis Obispo, CA 93408 1516 Ninth Street MS (31)

Sacramento, CA 95831 Mr. Truman Burns Mr. Robert Kinosian Mr. James R. Becker California Public Utilities Commission Site Vice President 505 Van Ness, Room 4102 Diablo Canyon Power Plant San Francisco, CA 94102 P.O. Box 56 Avila Beach, CA 93424 Diablo Canyon Independent Safety Committee Jennifer Tang Attn: Robert R. Wellington, Esq. Field Representative Legal Counsel United States Senator Barbara Boxer 857 Cass Street, Suite D 1700 Montgomery Street, Suite 240 Monterey, CA 93940 San Francisco, CA 94111 Regional Administrator, Region IV