ML13324A464
| ML13324A464 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 11/02/1984 |
| From: | Zwolinski J Office of Nuclear Reactor Regulation |
| To: | Baskin K SOUTHERN CALIFORNIA EDISON CO. |
| Shared Package | |
| ML13324A465 | List: |
| References | |
| LSO5-84-11-003, LSO5-84-11-3, NUDOCS 8411050453 | |
| Download: ML13324A464 (2) | |
Text
SREG UNITED STATES NUCLEAR REGULATORY COMMISSION lo WASHINGTON, D. C. 20555 November 2, 1984 Docket No. 50-206 LSO5-84-11-003 Mr. Kenneth P. Baskin, Vice President Nuclear Engineering Licensing and Safety Department Southern California Edison Company 2244 Walnut Grove Avenue Post Office Box 800 Rosemead, California 91770
Dear Mr. Baskin:
SUBJECT:
CONTAINMENT VENT VALVE OPERATION Re:
San Onofre Nuclear Generating Station, Unit No. 1 In two letters dated March 27, 1984, you provided information relating to use of-the containment vent system at San Onofre Unit 1. Your letters provided your rationale for allowing unlimited venting during operation.
The staff's position is that you should either limit vent system operation to a small fraction of the total time the plant is at power commensurate with safety-related requirements or provide further justification that continuous venting is required for the safety of the plant to be maintained.
The enclosed safety evaluation provides some guidance on the factors that should be included in such justification. In addition, the staff concludes that Technical Specification changes should be proposed to reflect the limitation on the opening angle of the vent valves.
Since some of the requested information which could support unlimited venting can only be obtained during normal operations, you should provide your schedule for responding to this letter within 30 days of return to service of Unit 1.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.
Sincerely, John A. Zwolinski, Chief Operating Reactors Branch #5 Division of Licensing
Mr. Kenneth November 2, 1984 cc Charles R. Kocher, Assistant General Counsel James Beoletto, Esquire Southern California Edison Company Post Office Box 800 Rosemead, California 91770 David R. Pigott Orrick, Herrington & Sutcliffe 600 Montogmery Street San Francisco, California 94111 Dr. Lou Bernath San Diego Gas & Electric Company P. 0. Box 1831 San Diego, California 92112 Resident Inspector/San Onofre NPS c/o 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, CA 95814 U.S. Environmental Protection Agency Region IX Office ATTN:
Regional Radiation Representative 215 Freemont Street San Francisco, California 94105 John B. Martin, Reqional Administrator Nuclear Regulatory Commission, Region V 1450 Maria Lane Walnut Creek, California 94596