ML16342C081
| ML16342C081 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 12/30/1998 |
| From: | Bateman W NRC (Affiliation Not Assigned) |
| To: | Rueger G PACIFIC GAS & ELECTRIC CO. |
| Shared Package | |
| ML16342A620 | List: |
| References | |
| TAC-MA0395, TAC-MA0396, TAC-MA395, TAC-MA396, NUDOCS 9901050162 | |
| Download: ML16342C081 (6) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON> D.c. 20555-O001 December 30, 1998 Mr. Gregory M. Rueger Senior Vice President and General Manager Pacific Gas and Electric Company Diablo Canyon Nuclear Power Plant P. O. Box 3 Avila Beach, California 93424
SUBJECT:
SAFETY EVALUATIONOF INSERVICE TESTING RELIEF REQUEST P-RR5-AUXILIARYSALTWATERPUMP PERFORMANCE USING EVALUATIONOF PUMP CURVES - DIABLOCANYON NUCLEAR POWER PLANT, UNIT NOS.
1 AND 2 (TAC NOS. MA0395 AND MA0396)
Dear Mr. Rueger:
By letter dated December 12, 1997, Pacific Gas and Electric Company (PG&E), submitted a new pump relief request P-RR5 for the second ten-year interval for Diablo Canyon Power Plant (DCPP), Units 1 and 2 Inservice Testing (IST) Program.
P-RR5 would allow auxiliary saltwater pump (ASWP) testing using an evaluation of pump performance compared to pump curves in lieu of Operation and Maintenance (OM) Part 6, "Inservice Testing of Pumps in Light-Water Reactor Power Plants," paragraph 5.2(b). PG&E states that compliance with OM Part 6 requirements for ASWP performance testing is impractical due to varying flow rates based on tide level (suction pressure) and heat exchanger differential pressure (system resistance),
which cannot be readily controlled. The NRC staff issued a request for additional information (RAI) related to pump relief request P-RR5 on June 2, 1998.
PG&E responded to the RAI in a letter dated August 31, 1998.
The staff has reviewed proposed relief request P-RR5 against the requirements of the 1989 Edition of Section XI of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code.
The results of the staffs review are provided in the enclosed Safety Evaluation (SE).
The staff concludes that consistent with the Code test requirements, the alternative proposed by the licensee will provide reasonable assurance of the operational readiness of the ASWPs.
Therefore, the use of the proposed alternative to the pump test requirements of OMa-1988, 990i050ih2 9Si230 PDR ADQCK 05000275 P
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Mr. Gregory M. Rueger December 30, 1998 Part 6, Paragraph 5.2(b) for the four ASWPs is authorized, pursuant to 10 CFR 50.55a(a)(3)(ii),
in that compliance with the specified requirement would result in a hardship or unusual difficulty without a compensating increase in the level of quality and safety.
Sincerely, Original signed by Chet Poslusny for Docket Nos. 50-275 and 50-323
Enclosure:
Safety Evaluation cc w/encl: See next page William H. Bateman, Director Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation DISTR I BUTION:
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Mr. Gregory M. Rueger December 30, 1998 cc w/encl:
NRC Resident Inspector Diablo Canyon Nuclear Power Plant do U.S. Nuclear Regulatory Commission P. O. Box 369 Avila Beach, California 93424 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower 8 Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Dr. Richard Ferguson, Energy Chair Sierra Club California 1100 11th Street, Suite 311 Sacramento, California 95814 Christopher J. Warner, Esq.
Pacific Gas & Electric Company
'ost Office Box 7442 San Francisco, California 94120 Ms. Nancy Culver San Luis Obispo Mothers for Peace P. O. Box 164 Pismo Beach, California 93448 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, California 93408 Mr. David H. Oatley, Vice President Diablo Canyon Operations and Plant Manager Diablo Canyon Nuclear Power Plant P.O. Box 3 Avila Beach, California 93424 Telegram-Tribune ATTN: Managing Editor 1321 Johnson Avenue P.O. Box 112 San Luis Obispo, California 93406 Mr. Truman Burns Mr. Robert Kinosian California Public Utilities Commission 505 Van Ness, Room 4102 San Francisco, California 94102 Mr. Steve Hsu Radiologic Health Branch State Department of Health Services Post Office Box 942732 Sacramento, California 94232 Diablo Canyon Independent Safety Committee ATTN: Robert R. Wellington, Esq.
Legal Counsel 857 Cass Street, Suite D Monterey, California 93940
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