ML20055E164
| ML20055E164 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/28/1990 |
| From: | Larkins J Office of Nuclear Reactor Regulation |
| To: | Cotton G, Ray H SAN DIEGO GAS & ELECTRIC CO., SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| IEB-89-001, IEB-89-1, TAC-77035, NUDOCS 9007110078 | |
| Download: ML20055E164 (3) | |
Text
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o, June 28, 1990 I
Docket No. 50-362
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Mr. Harold B. Ray.
Mr. Gary D. Cotton Senior Vice President Senior Vice President Southern California Edison Co.
Engineering and Operations
- Irvine Operations Center San Diego Gas & Electric Co.
23 Parker Street 101 Ash Street Irvine,-California 92718 San Diego, California 92112 Gentlemen:
SUBJECT:
AUTHORIZATION FOR USE OF ALLOY 690 AS AN ALTERNATIVE TO ALLOY 600 IN STEAM GENERATOR TUBE PLUGS IN ACCORDANCE WITH 10 CFR 50.55a(a)(3)
J (TAC NO. 77035)
By letter dated June 27, 1990, you requested to use plugs fabricated of-nickel-chromium-iron UNS'N-06690 material (Alloy 690) as an alternative to Alloy 600 to plug tubes in the steam generators of San Onofre Nuclear Generating Station, Unit No. 3.
The Alloy 690 material has mechanical properties similar to Alloy 600 and has superior corrosion resistance properties. 'The NRC Staff endorsed the use of the Alloy 690 for fabrication of mechanical plugs for steam generator tubes in NRC Bulletin No. 89-01, " Failure of Westinghouse Steam Generator Tube Mechanical Plugs", May 15, 1989.
9 We have reviewed your request and supporting information and conclude that the use of Alloy 690 in the requisite product forms as a proposed alternative to the use of Alloy 600, will provide an acceptable level of quality and safety and, its use for pluggin of 10 CFR 50.55a(a)g tubes in steam generators is authorized under the provisions (3).
Therefore, based on the above, Alloy 690 in the requisite product forms is undertheprovisionsof10CFR50.55a(a)(3).
Sincerely,
/s/
John T. Larkins, Acting Director Project Directorate V Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation cc: See next page DISTRIBUTION Docket File NRC & Local PDRs PD5 Rdg D. Crutchfield B. Boger D. Foster L. Kokajko OGC E. Jordan (MNBB3302)
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June 28, 1990 j
Docket No. 50-362 r
Mr. Harold B. Ray Mr. Gary D. Cotton Senior Vice President Senior Vice President Southern California Edison Co.
Engineering and Operations Irvine Operations Center San Diego Gas & Electric Co.
23 Parker Street 101 Ash Street Irvine, California 92718 San Diego, California 92112 Gentlemen:
SUBJECT:
AUTHORIZATION FOR USE OF ALLOY 690 AS AN ALTERNATIVE TO ALLOY 600 IN STEAM GENERATOR TUBE PLUGS IN ACCORDANCE WITH 10 CFR 50.55a(a)(3) i (TAC NO. 77035)
By letter dated June 27, 1990, you requested to use plugs fabricated of nickel-chromium-iron UNS N-06690 material (Alloy 690) as an alternative to Alloy 600 to plug tubes in the steam generators of San Onofre Nuclear Generating Station, Unit No. 3.
The Alloy 690 material has mechanical properties similar to Alloy 600 and has superior corrosion resistance properties. The NRC Staff endorsed the use of the Alloy 690 for fabrication of mechanical plugs for steam generator tubes in NRC Bulletin No. 89-01, " Failure of Westinghouse Steam Generator Tube Mechanical Plugs", May 15, 1989.
We have reviewed your request and supporting information and conclude that the use of Alloy 690 in the requisite product forms as a proposed alternative to the use of Alloy 600, will provide an acceptable level of quality and safety and, its use for pluggin of 10 CFR 50.55a(a)g tubes in steam generators is authorized under the provisions (3).
Therefore, based on the above, Alloy 690 in the requisite product forms is undertheprovisionsof10CFR50.55a(a)(3).
Sincerely,
/s/
John T. Larkins, Acting Director Project Directorate V Division of Reactor Projects - III, IV, Y and Special Projects Office of Nuclear Reactor Regulation cc: See next page DISTRIBUTION Docket File NRC & Local PDRs PDS Rdg D. Crutchfield B. Boger D. Foster L. Kokajko 0GC E. Jordan (MNBB 3302)
ACRS(10)
R. Zimmerman(Region V) i l
C. Caldwell (Region V)
A. Hon (Region V) l PN/P Er/DRSP EM_CBf D SP OGC l
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DOCUMENT NAME: TAC 77035
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t' Messis. Ray and Cotton San Onofre Nuclear Generating Southern California Edison Company Station, Unit 3 cc:
Charles R. Kocher, Esq.
Mr. Richard J. Kosiba, Project Manager James A. Beoletto, Esq.
Bechtel Power Corporation Southern California Edison Company 12440 E. Imperial Highway Irvine Operations Center Norwalk, California 90060 23 Parker Irvine, California 92718 Mr. Robert G. Lacy Manager, Nuclear Department i
Orrick, Herrington & Sutcliffe San Diego Gas & Electric Company
)
ATTN: David R. Pigott, Esq.
P. O. Box 1831 600 Montgomery Street San Diego, California 92112 San Francisco, California 94111 Mr. John Hickman Alan R. Watts, Esq.
Senior Health Physicist Rourke & Woodruff Environmental Radioactive Mgmt. Unit 701 S. Parker St. No. 7000 Environmental Management Branch Orange, California 92668-4702 State Department of Health Services 714 P Street, Room 616 Mr. Sherwin Harris Sacramento, California 95814 Resource Project Manager Public Utilities. Department Resident Inspector, San Onofre NPS City of Riverside c/o U.S. Nuclear Regulatory Commission 3900 Main Street Post Office Box 4329 Riverside, California 92522 San Clemente, California 92672 Mr. Charles B. Brinkman Mayor Combustion Engineering, Inc.
City of San Clemente 12300 Twinbrook Parkway, Suite 330 San Clemente, California 92672 Rockville, Maryland 20852 Regional Administrator, Region V Mr. Phil Johnson U.S. Nuclear Regulatory Comission l
U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Region V Walnut Creek, California 94596 o
1450 Maria Lane, Suite 210 l
Walnut Creek, California 94596 Chairman, Board of Supervisors San Diego County Mr. Don Womeldorf 1600 Pacific Highway, Room 335 Chief, Environmental Management Branch San Diego, California 92101 i
California Department of Health 714 P Street, Room 616 Sacramento, California 95814 l
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