ML082880677

Closeout of Generic Letter 2007 -01 Inaccessible or Underground Power Cable Failures That Disable Accident Mitigation Systems or Cause Plant Transients

ML082880677
Person / Time
Site:	San Onofre
Issue date:	10/28/2008
From:	Kalyanam N Plant Licensing Branch IV
To:	Ridenoure R Southern California Edison Co
Kalyanam N, NRR/DLPM, 415-1480
References
TAC MD4377, TAC MD4378
Download: ML082880677 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 28, 2008 Mr. Ross 1. Ridenoure Senior Vice President and Chief Nuclear Officer Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92674-0128

SUBJECT:

SAN ONOFRE NUCLEAR GENERATING STATION, UNITS 2 AND 3 CLOSEOUT OF GENERIC LETTER 2007-01, "INACCESSIBLE OR UNDERGROUND POWER CABLE FAILURES THAT DISABLE ACCIDENT MITIGATION SYSTEMS OR CAUSE PLANT TRANSIENTS" (TAC NOS.

MD4377 AND MD4378)

Dear Mr. Ridenoure:

On February 7,2007, the U.S. Nuclear Regulatory Commission (NRC) issued Generic Letter (GL) 2007-01, "Inaccessible or Underground Power Cable Failures That Disable Accident Mitigation Systems or Cause Plant Transients" (Agencywide Documents Access and Management System (ADAMS) Accession No. ML070360665). GL 2007-01 requested that licensees provide the following information within 90 days of the date of the GL:

(1) A history of inaccessible or underground power cable failures for all cables that are within the scope of Section 50.65 of Title 10 of the Code of Federal Regulations (10 CFR 50.65, the Maintenance Rule) and for all voltage levels including the cable type, cable manufacturer, date of failure, type of service, voltage class, years of service, and the root causes for the failure; and (2) A description of all inspection, testing, and monitoring programs to detect the degradation of inaccessible or underground power cables that support emergency diesel generators (EDGs), offsite power, emergency service water (ESW), service water, component cooling water, and other systems that are within the scope of 10 CFR 50.65 (the Maintenance Rule).

In your letters dated May 7, 2007 (ADAMS Accession No. ML071350235), and February 14, 2008 (ADAMS Accession No. ML080510200), you provided the information requested in GL 2007-01 and the subsequent request for additional information including:

(1) A history of inaccessible or underground power cable failures for all cables that are within the scope of 10 CFR 50.65 (the Maintenance Rule) and for all voltage levels including the cable type, cable manufacturer, date of failure, type of service, voltage class, years of service, and the root causes for the failure; and (2) A description of all inspection, testing, and monitoring programs to detect the degradation of inaccessible or underground power cables that support EDGs,

R. Ridenoure -2 offsite power, ESW, service water, component cooling water, and other systems that are within the scope of 10 CFR 50.65 (the Maintenance Rule).

The NRC staff has reviewed the submitted information and has concluded that for San Onofre Nuclear Generating Station, Unit 2 and 3, your response to GL 2007-01 is adequate. Based on this review, your response to GL 2007-01 is considered closed and no further action is requested of you at this time.

If you have any questions regarding this letter, please feel free to call me at (301) 415-1480.

Sincerely, N. Kalyanam, Project Manager Plant Licensing Branch LPL4 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-361 and 50-362 cc: See next page

San Onofre Nuclear Generating Station (9/2008)

Units 2 and 3 cc:

Douglas K. Porter, Esquire Regional Administrator, Region IV Southern California Edison Company U.S. Nuclear Regulatory Commission 2244 Walnut Grove Avenue 612 E. Lamar Blvd., Suite 400 Rosemead, CA 91770 Arlington, TX 76011-41254 Dr. David Spath, Chief Mayor Division of Drinking Water and City of San Clemente Environmental Management 100 Avenida Presidio California Dept. of Health Services San Clemente, CA 92672 850 Marina Parkway, Bldg P, 2 nd Floor Richmond, CA 94804 Mr. James 1. Reilly Southern California Edison Company Chairman, Board of Supervisors San Onofre Nuclear Generating Station County of San Diego P.O. Box 128 1600 Pacific Highway, Room 335 San Clemente, CA 92674-0128 San Diego, CA 92101 Vice President and Site Manager Mark L. Parsons Southern California Edison Company Deputy City Attorney San Onofre Nuclear Generating Station City of Riverside P.O. Box 128 3900 Main Street San Clemente, CA 92674-0128 Riverside, CA 92522 Additional Distribution via ListServ

October 28, 2008 R. Ridenoure -2 offsite power, ESW, service water, component cooling water, and other systems that are within the scope of 10 CFR 50.65 (the Maintenance Rule).

The NRC staff has reviewed the submitted information and has concluded that for San Onofre Nuclear Generating Station, Unit 2 and 3, your response to GL 2007-01 is adequate. Based on this review, your response to GL 2007-01 is considered closed and no further action is requested of you at this time.

If you have any questions regarding this letter, please feel free to call me at (301) 415-1480.

Sincerely, IRAI N. Kalyanam, Project Manager Plant Licensing Branch LPL4 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket l\Ios. 50-361 and 50-362 cc: See next page DISTRIBUTION:

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