ML13330B343

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Responds to 880527 near-final Results of Environ Qualification of Electrical Equipment Review.Subj to Successful Completion of Cable walk-downs & Actions Described in Ltr,Returning to Svc Acceptable
ML13330B343
Person / Time
Site: San Onofre Southern California Edison icon.png
Issue date: 06/16/1988
From: Trammell C
Office of Nuclear Reactor Regulation
To: Baskin K
SOUTHERN CALIFORNIA EDISON CO.
References
TAC-67758, NUDOCS 8807110312
Download: ML13330B343 (4)


Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 June 16, 1988 Docket No. 50-206 Mr. Kenneth P. Baskin Vice President Southern California Edison Company 2244 Walnut Grove Avenue Post Office Box 800 Rosemead, California 91770

Dear Mr. Baskin:

SUBJECT:

ENVIRONMENTAL QUALIFICATION OF ELECTRICAL EQUIPMENT (TAC NO. 67758)

Re:

San Onofre Nuclear Generating Station, Unit No. 1 This is in response to your letter of May 27, 1988 in which you reported the near-final results of your review of environmental qualification of electrical equipment.

You indicate that a comprehensive re-review of all safety-related equipment which could potentially be located in a harsh environment has been performed and that this review has indicated that additional components require qualification. These components have either been qualified or replaced with qualified components and added to the Environmental Qualification Master List.

To ensure accuracy of your review, you had an independent verification performed by an outside consultant.

In addition, you state that all electrically interconnected equipment was reviewed for electrical components which could fail in a postulated harsh environment and affect the above safety-related equipment. Where potential interaction was identified, circuits were modified by electrical fuse isola tion, based on a fuse-breaker coordination analysis.

The major part of your review effort has been completed. You state that some final cable verification work should be complete by mid-June and that the unit will comply with 10 CFR 50.49 at the time it returns to service.

P

.710312 880616 PDR ADOCK 05000206o P.

D

-2 Subject to successful completion of the cable walk-downs, and based on your actions as described in your letter, we have no objection to your returning the unit to service. We plan to conduct a joint NRR/Region V post-implementation inspection of environmental qualification of electrical equipment at San Onofre Unit I in the future.

Sincerely, 6"L 1--7r4a~2(e Charles M. Trammell, Senior Project Manager Project Directorate V Division of Reactor Projects -

III, IV, V and Special Projects cc:

See next page

Mr. Kenneth P. Baskin San Onofre Nuclear Generating Southern California Edison Company Station, Unit No. 1 cc Charles R. Kocher, Assistant Mr. Jack McGurk, Acting Chief General Counsel Jaesneletosqir Radiological Health Branch JamesState Department of Health Southern California Edison Company Services Post Office Box 800 714 P Street, Office Bldg. 8 Rosemead, California 91770 Sacramento, California 95814 David R. Pigott Mr. Hans Kaspar, Executive Director Orrick, Herrington & Sutcliffe Marine Review Committee, Inc.

600 Montgomery Street 531 Encinitas Boulevard, Suite 105 San Francisco, California 94111 Encinitas, California 92024 Mr. Robert G. Lacy Mr. Dennis M. Smith, Chief Manager, Nuclear Radiological Programs Division San Diego Gas & Electric Company Governor's Office of Emergency Svcs.

P. 0. Box 1831 State of California San Diego, California 92112 2800 Meadowview Road Sacramento, California 95832 Resident Inspector/San Onofre NPS U.S. NRC P. 0. Box 4329 San Clemente, California 92672 Mayor City of San Clemente San Clemente, California 92672 Chairman Board of Supervisors County of San Diego San Diego, California 92101 Director Energy Facilities Siting Division Energy Resources Conservation &

Development Commission 1516 - 9th Street Sacramento, California 95814 Regional Administrator, Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 SWalnut Creek, CaClafornia 945

-2 Subject to successful completion of the cable walk-downs, and based on your actions as described in your letter, we have no objection to your returning the unit to service. We plan to conduct a joint NRR/Region V post-implementation inspection of environmental qualification of electrical equipment at San Onofre Unit 1 in the future.

Sincerely, original signed by Charles M. Trammell, Senior Project Manager Project Directorate V Division of Reactor Projects -

III, IV, V and Special Projects cc:

See next page DISTRIBUTION Docket File NRC&LPDRs CTrammell GHolahan JLee OGC-White Flint PDV Plant File Edordan JPartlow ACRS (10)

HWalker JCraig JKudrick RHuey AHon UPotapovs

  • PREVIOUSLY CONCURRED DRSP/PDV*

NRR/SPLB*

DRSP/D:PDV*

CTrammell:dr JCraig GWKnighton 6/9/88 6/13/88 6/16/88 OFFICIAL RECORD COPY