ML20125A425
| ML20125A425 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 12/03/1992 |
| From: | Quay T Office of Nuclear Reactor Regulation |
| To: | Guiles E, Ray H SAN DIEGO GAS & ELECTRIC CO., SOUTHERN CALIFORNIA EDISON CO. |
| Shared Package | |
| ML20125A428 | List: |
| References | |
| TAC-M80698, TAC-M80699, NUDOCS 9212080341 | |
| Download: ML20125A425 (4) | |
Text
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December 3, 1992 Docket Nos. 50-361 and 50-362 Mr. Harold B. Ray Mr. Edwin A. Guiles Senior Vice President Vice President Southern California Edison Co.
Engineering und Operations Irvine Operations Center San Diego Gas & Electric Co.
23 Parker Street 101 Ash Street Irvine, California 92718 San Diego, California 92112 Gentlemen:
SUBJECT:
INSERVICE INSPECTION RELIEF REQUESTS B-7, B-8, B-9 AND 00DE CASE N-481 FOR SAN ON0fRE NUCLEAR GENERATING STATION, UNITS 2 AND 3 (TACfC' M80698 AND M80699)
Southern Californ.m Jison (SCE) found during a performance demonstrction test that the alternative examinations proposed in its letter dated June 26, 1991, were not successful in validating the acceptability of full volumetric examination from the pipe exterior surface to detect outside diameter, surface-connected, crack-like defects.
As a result of the unsuccessful test, the licensee submitted revised Request No. B-7 by letter dated March 20, 1992, for alternative examinations replacing the version of the Relief Request No.
B-7 transmitted by letter dated June 26, 1991.
Also contained in this letter was Relief Request B-8 from the requirements of Section XI of the ASME Boiler and Pressure Vessel Code (the Code) which had been determined to be impractical to perform at San Onofre Nuclear Generating Station (SONGS), Units 2 and 3.
In a letter dated July 31, 1992, SCE identified 6 additional welds in each unit which are not covered by existing relief requests, but for which relief identical to Relief Request B-7 is appropriate.
In this letter, SCE submitted Relief Request B-9 to cover these welds and proposes an alternate inspection method that is identical to the inspection method proposed for B-7.
Separate from the above, the licensee's June 26, 1991 letter, provided supplementary information necessary to clarify portions of the SONGS Units 2 and 3 first 10-year interval Inservice Inspection Program.
The NRC staff, with technical assistance from its contractor, the Idaho National Engineering Laboratory, has evaluated SCE's request for code relief, request to use alternative examinations, and the additional information pertaining to the first 10-year interval Inservice Inspection Program for SONGS Units 2 and 3.
The staff has concluded that, pursuant to 10 CFR 50.55a(f)(6)(i), relief may be granted for Relief Request No. B-8 and, pursuant to 10 CFR 50.55a(a)(3)(1), the alternative examinations for Relief neynn4r
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o Messrs. Ray and Guiles December 3,1992 Requests B-7 and B-9 may be used.
In addition, the staff concluded that, pursuant to 10 CFR 50.55a(a)(3)(1), the licensee may use Code Case N-481 for the Reactor Coolant Pump Casing Welds as an alternative examination.
The above alternative examinations will provide an acceptable level of quality and safety for SONGS Units 2 and 3.
Furthermore, the staff concludes that the additional information provided regarding the first 10-year interval Inservice Inspection program is acceptable.
The staff's Safety Evaluation is enclosed.
Sincerely, Original signed by:
< mes W. Clif ford, Acting Project Director for:
Theodore R. Quay, Director Project Directorate V Division of Reactor Projects Ill/IV/V Office of Nuclear Reactor Regulation
Enclosure:
Safety Evaluation cc w/ enclosure:
See next page j
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Messrs. Ray and Guiles.
Requests B-7 and 8-9 may be used.
In addition, the staff concluded that, pursuant to 10 CFR 50.55a(a)(3)(1), the licensee may use Code Case N-481 for the Reactor Coolant Pump Casing Welds as an alternative examination.
The above alternative examinations will provide an acceptable level of quality and safety for SONGS Units 2 and 3.
Furthermore, the staff concludes that the additional information provided regarding the first 10-year interval Inservice Inspection program is acceptable.
lhe staff's Safety Evaluation is enclosed.
Sincerely, J'
M Th'eodore R. Qua, Director Project Directorate V Division of Reactor Projects Ill/lV/V Office of Nuclear Reactor Regulation
Enclosure:
Safety Evaluation cc w/ enclosure:
See next page
Messrs. Ray and Juiles han Onofre Nuclear Generating Southern California Edison Company Station, Unit Nos. 2 and 3 cc:
James A. Booletto, Esq.
Mr. Richard J. Kosiba, Project Manager Southern California Edison Company Bechtel Power Corporation Irvine Operations Cent.:r l'c440 E. Imperial Highway 23 Parker Street Norwalk, California 90650 Irvine, Californie 92718 Hr. Robert G. Lacy Chairman, Board of Supervisors Manager, Nuclear Department County of San Diego San Diego Gas & Electric Company 1600 Pacific Highway, Room 335 P. O. Box 1831 San Diego, California 92101 San Diego, California 92112 Alan R. Watts, Esq.
Mr. Hank Kocol Rourke & Woodruff Radiologic Health Branch 701 S. Parker St. No. 7000 State Department of Health Services Oranqe, CA lfornia 92668-4702 Post Office Box 942732 Sacreme'ito, California 94234 Mr. Sherwin Harris Resource Project Manager Public Utilities Department City of Riverside Resident Inspector / San Onofre NPS 3900 Main Street c/o U.S. Nuclear Regulatory Commission Riverside, California 92522 Post Office Box 4329 San Clemente, California 92674 Mr. Charles B. Brinkman, Manager Washington Nuclear Operations ABB Combustion Engineering Nuclear Power Mayor 12300 Twinbrook Parkway, Suite 330 City of San Cicmente Rockville, Maryland 208C2 100 Avenida Presidio San Clemente, California 92672 Mr. Howard J. Wong Regional Administrator, Region V U.S. Nuclur Regulatory Commission U.S. Nuclear Regulatory Commission Region V 141C Haria Lane, 'uite 210 1450 Maria Lane Suite 210 Walnut Creek, Ca*s/ornia 94596 Walnut Creek, California 94596 Mr. Don J. Womeldorf Chief, Environmental Management Branch California Department of Health Services 714 P Street, Room 616 Sacramento, California 95814