ML081610699
| 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
(*) 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
ENCLOSURE 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.
Diablo Canyon Power Plant, Units 1 and 2 (3/10/2008) cc:
NRC Resident Inspector Diablo Canyon Power Plant c/o U.S. Nuclear Regulatory Commission P.O. Box 369 Avila Beach, CA 93424 Sierra Club San Lucia Chapter ATTN: Andrew Christie P.O. Box 15755 San Luis Obispo, CA 93406 Ms. Nancy Culver San Luis Obispo Mothers for Peace P.O. Box 164 Pismo Beach, CA 93448 Chairman San Luis Obispo County Board of Supervisors 1055 Monterey Street, Suite D430 San Luis Obispo, CA 93408 Mr. Truman Burns Mr. Robert Kinosian California Public Utilities Commission 505 Van Ness, Room 4102 San Francisco, CA 94102 Diablo Canyon Independent Safety Committee Attn: Robert R. Wellington, Esq.
Legal Counsel 857 Cass Street, Suite D Monterey, CA 93940 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 Jennifer Post, Esq.
Pacific Gas & Electric Company P.O. Box 7442 San Francisco, CA 94120 City Editor The Tribune 3825 South Higuera Street P.O. Box 112 San Luis, Obispo, CA 94306-0112 Director, Radiologic Health Branch State Department of Health Services P.O. Box 997414, MS 7610 Sacramento, CA 95899-7414 Mr. James Boyd, Commissioner California Energy Commission 1516 Ninth Street MS (31)
Sacramento, CA 95831 Mr. James R. Becker Site Vice President Diablo Canyon Power Plant P.O. Box 56 Avila Beach, CA 93424 Jennifer Tang Field Representative United States Senator Barbara Boxer 1700 Montgomery Street, Suite 240 San Francisco, CA 94111