ML16342D231
| ML16342D231 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 03/01/1996 |
| From: | Bateman W NRC (Affiliation Not Assigned) |
| To: | Rueger G PACIFIC GAS & ELECTRIC CO. |
| Shared Package | |
| ML16342D232 | List: |
| References | |
| TAC-M94785, TAC-M94786, NUDOCS 9603060561 | |
| Download: ML16342D231 (6) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, O.C. 2055&0001 March 1, 1996 Hr. Gregory M. Rueger Pacific Gas and Electric Company NPG - Mail Code AlOD P. 0.
Box 770000 San Francisco, California 94177
SUBJECT:
REQUEST FOR RELIEF FROH ASHE SECTION XI AND ASHE/ANSI OM-1987, PART 6, REQUIREMENTS FOR CENTRIFUGAL CHARGING PUMPS (TAC NOS.
M94785 AND H94786)
Dear Hr. Rueger:
By letter dated February 16, 1996, Pacific Gas and Electric (PG&E), submitted a request for approval of an alternative related to the Inservice Testing Program for Pumps and Valves for the Diablo Canyon Nuclear Power Plant (DCPP),
Units 1
and 2.
Specifically, Relief Request P-RR-3 for the second ten-year interval for both units and P-RR-10 for the remainder of the Unit 2 first ten-year interval which proposes a change in the testing of the'entrifugal charging pumps in the chemical and volume control system.
The staff's findings are contained in the enclosed safety evaluation.
The staff has determined that the proposed alternative to perform quarterly testing of the centrifugal charging pumps using an instrumented injection flow path and a non-instrumented minimum recirculation flow path, supplemented with a test during refueling outages that uses only instrumented flow paths, is authorized pursuant to 10 CFR 50.55a(a)(3)(i) based on the acceptable level of quality and safety afforded by the alternative testing.
The DCPP technical specifications specify that the requirements of the ASHE Code must be met "except where specific written relief has been granted by the Commission pursuant to 10 CFR 50, Section 50.55a(g)(6)(i)."
Paragraph (g)(6)(i) refers to conditions in the plant that make the implementation of the ASHE Code requirements impractical based on limitations or design,
- geometry, and materials of construction.
Your letter indicated that the "relief is justified in accordance with 10 CFR 50.55a(a)(3)(i) because the proposed alternative testing provides an acceptable level of quality and safety."
The staff's evaluation determined that the alternative did provide an acceptable level of quality and safety.
It also noted considerations related to the plant configuration that could also justify that the Code 9b0306056i 96030i PDR ADOCK 05000275 P
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Mr. Gregory M. Rueger March 1, 1996 requirements are impractical based on limitations in the design of the pumping system.
To retain flexibilitywith respect to requests for relief, you might considei changing the technical specifications as recommended in Section 6 of NUREG-1482.
Sincerely, Docket Nos.
50-323 and 50-275
Enclosure:
Safety Evaluation cc w/encl:
See next page DOCUMENT NAME:
DC94785.LTR Original Signed By William H. Bateman, Director Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation DISTRIBUTION:
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Mr. Gregory M. Rueger March 1, 1996 cc w/encl:
NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P.
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Box 369 Avila Beach, California 93424 Dr. Richard Ferguson, Energy Chair Sierra Club California 1100 11th Street, Suite 311 Sacramento, California 95814 Ms. Nancy Culver San Luis Obispo Mothers for Peace P. 0.
Box 164 Pismo Beach, California 93448 Ms. Jacquelyn C. Wheeler P. 0.
Box 164 Pismo Beach, California 93448 Managing Editor The Count Tele ram Tribune 1321 Johnson Avenue P. 0.
Box 112 San Luis Obispo, California 93406 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, California 93408 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 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower 5 Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Christopher J. Warner, Esq.
Pacific Gas h Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. Warren H. Fujimoto Vice President and Plant Manager Diablo Canyon Nuclear Power Plant P. 0.
Box 56 Avila Beach, California 93424 Diablo Canyon Independent Safety Committee ATTN:
Robert R. 'Wellington, Esq.
Legal Counsel 857 Cass Street, Suite D
Monterey, California 93940
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