ML13331B206
| ML13331B206 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 08/01/1989 |
| From: | Trammell C Office of Nuclear Reactor Regulation |
| To: | Baskin K Southern California Edison Co |
| References | |
| TAC-71130, TAC-73622 NUDOCS 8908070126 | |
| Download: ML13331B206 (3) | |
Text
August 1, 1989 Docket No.: 50-206 DISTRIBUTION Docket File NRC & LPDRs CTrammell (2)
Mr. Kenneth P. Baskin MVirgilio Vice President JLee Southern California Edison Company OGC-White Flint 2244 Walnut Grove Avenue PD5 Plant File Post Office Box 800 EJordan Rosemead, California 91770 BGrimes ACRS (10)
Dear Mr. Baskin:
SUBJECT:
OVERPRESSURE MITIGATION SYSTEM AMENDMENT REQUESTS (TAC NOS. 71130 AND 73622)
Re: San Onofre Nuclear Generating Station, Unit No. 1 This refers to Amendment Application No. 154 dated October 27, 1988 and Amend ment Application No. 172 dated July 3, 1989, both of which involve revisions to the requirements for the overpressure mitigation system. We have decided to halt our review of these requests.
The October 27, 1988 application states that it requires that the OMS be operable whenever the residual heat removal (RHR) system is in operation but the actual wording of the proposed technical specification does not appear to implement this intent. In fact, it appears to have the same defect that was explained in our November 12, 1982 Safety Evaluation of Topic V-10.B, "RHR Reliability": that the OMS would not be required during RHR operation if pressurizer level was less than 50%. The amendment request did not contain any explanation for this wording or refer to this earlier safety evaluation.
The July 3, 1989 request would put the setpoint for OMS within 20 psi of the pressure for activating the system. As your staff explained, it is investi gating additional changes to see if this setpoint can be raised.
In light of these observations, we believe that SCE needs to slow down and take a careful look at all aspects of the OMS technical specifications and bases and submit a single amendment that fully addresses and resolves all OMS issues.
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 D1, DSRS
- PD5 Tammell:dr Knighton O7
/89/
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o UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 August 1, 1989 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:
OVERPRESSURE MITIGATION SYSTEM AMENDMENT REQUESTS (TAC NOS. 71130 AND 73622)
Re: San Onofre Nuclear Generating Station, Unit No. 1 This refers to Amendment Application No. 154 dated October 27, 1988 and Amend ment Application No. 172 dated July 3, 1989, both of which involve revisions to the requirements for the overpressure mitigation system. We have decided to halt our review of these requests.
The October 27, 1988 application states that it requires that the OMS be operable whenever the residual heat removal (RHR) system is in operation but the actual wording of the proposed technical specification does not appear to implement this intent. In fact, it appears to have the same defect that was explained in our November 12, 1982 Safety Evaluation of Topic V-10.B, "RHR Reliability": that the OMS would not be required during RHR operation if pressurizer level was less than 50%. The amendment request did not contain any explanation for this wording or refer to this earlier safety evaluation.
The July 3, 1989 request would put the setpoint for OMS within 20 psi of the pressure for activating the system. As your staff explained, it is investi gating additional changes to see if this setpoint can be raised.
In light of these observations, we believe that SCE needs to slow down and take a careful look at all aspects of the OMS technical specifications and bases and submit a single amendment that fully addresses and resolves all OMS issues.
Sincerely, 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 David R. Pigott Mr. F. B. Marsh, Project Manager Orrick, Herrington & Sutcliffe Bechtel Power Corporation 600 Montgomery Street P. 0. Box 60860 San Francisco, California 94111 Terminal Annex Los Angeles, California 90060 Mr. Robert G. Lacy Manager, Nuclear San Diego Gas & Electric Company P. 0. Box 1831 San Diego, California 92112 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 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 Dr. Gerard C. Wong, Chief Radiological Materials Control Section State Department of Health Services 714 P Street, Office Bldg. #8 Sacramento, California 95814 Mr. Don Womeldorf Chief Environmental Management California Department of Health 714 P Street, Room 616 Sacramento, California 95814 (9)