ML13317B264
| ML13317B264 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 01/03/1991 |
| From: | Kalman G Office of Nuclear Reactor Regulation |
| To: | Ray H Southern California Edison Co |
| References | |
| NUDOCS 9101090174 | |
| Download: ML13317B264 (2) | |
Text
January 3, 1991 Docket No. 50-206 Mr. Harold B. Ray Senior Vice President Southern California Edison Co.
Irvine Operations Center 23 Parker Street Irvine, California 92718
Dear Mr. Ray:
SUBJECT:
DC THERMAL BARRIER PUMP TEST Thank you for your letter dated January 2, 1991, in which you described your plans for revising station blackout procedures and your proposal to test the DC thermal barrier pump. You also requested permission to remove the Component Cooling Water (CCW) System from service for 16 hours1.851852e-4 days <br />0.00444 hours <br />2.645503e-5 weeks <br />6.088e-6 months <br /> to perform the pump test.
A secured CCW System is a test prerequisite.
There are no direct regulatory requirements governing operation of the CCW while the reactor is defueled. However, in a safety evaluation supporting license amendment 132, submitted on May 16, 1990, you stated that one train of the CCW System will operate at all times during the Cycle 11 outage. We concur with your current assessment that there is minimal safety significance in securing the CCW for 16 hours1.851852e-4 days <br />0.00444 hours <br />2.645503e-5 weeks <br />6.088e-6 months <br /> while the reactor is defueled and while the heat load in the spent fuel pool is relatively small.
Pump data obtained during the test will increase the safety margin of future operations. The benefit derived from the proposed test outweighs the minimal concerns associated with securing the CCW System. We approve your request to secure the CCW under the conditions and restrictions outlined in your letter dated January 2, 1991.
Sincerely, Original Signed By:
George Kalman, Senior Project Manager Project Directorate V Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation cc: See next page DISTRIBUILON
,Docket File_ NRC & LPDRs PD5 Reading PD5 Plant BBoger OGC MVirgilio DFoster Kalman EJordan JDyer ACRS (10)
RZimmerman, RV OFC-
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- GKalman:pmm
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DATE :(/3/91
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Mr. Harold B. Ray San Onofre Nuclear Generating Southern California Edison Company Station, Unit No. 1 cc:
David R. Pigott, Esq.
Mr. Richard J. Kosiba, Project Manager Orrick, Herrington & Sutcliffe Bechtel Power Corporation 600 Montgomery Street 12440 E. Imperial Highway San Francisco, California 94111 Norwalk, California 90650 Mr. Robert G. Lacy Mr. Phil Johnson Manager, Nuclear Department U.S. Nuclear Regulatory Commission San Diego Gas & Electric Company Region V P. 0. Box 1831 1450 Maria Lane, Suite 210 San Diego, California 92112 Walnut Creek, California 94596 Resident Inspector, San Onofre NPS c/o U.S. Nuclear Regulatory Commission P. 0. Box 4329 San Clemente, California 92672 Mayor City of San Clemente 100 Avenida Presidio San Clemente, California 92672 Chairman, Board of Supervisors County of San Diego 1600 Pacific Highway, Room 335 San Diego, California 92101 Regional Administrator, Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Mr. John Hickman Senior Health Physicist Environmental Radioactive Mgmt. Unit Environmental Management Branch State Department of Health Services 714 P Street, Room 616 Sacramento, California 95814 Mr. Don J. Womeldorf Chief, Environmental Management Branch California Department of Health Services 714 P Street, Room 616 Sacramento, California 95814 (10)