ML13324A815
| ML13324A815 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 03/07/1986 |
| From: | Lear G Office of Nuclear Reactor Regulation |
| To: | Baskin K SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| NUDOCS 8603140085 | |
| Download: ML13324A815 (3) | |
Text
MAR 0 7 1988 Docket No.:
50-206 Mr. Kenneth P. Baskin, Vice President Nuclear Engineering Safety and Licensing Department Southern California Edison Company 2244 Walnut Grove Avenue P.O. Box 800 Rosemead, California 91770
Dear Mr. Baskin:
SUBJECT:
REPORTS ON PRA INSIGHTS -
(SAN ONOFRE, UNIT NO. 1)
Enclosed are two draft reports concerning technical insights gained from Probabilistic Risk Assessments (PRAs).
These reports are the outcome of an ongoing effort to make available and utilize in numerous technical and managerial activities the information in PRAs regarding the factors which dominate the risk associated with nuclear power plants. This effort includes identification of the features of design or operational practices which have been found to be important to safety in the types of plants which have been subjected to risk assessments. In addition, the section on insights into PRA methodologies focuses on areas which are sensitive to the results and the overall perception of plant weaknesses and vulnerabilities.
In particular, these reports contain discussions of:
general insights on plant strengths and weaknesses gained from PRAs; the contribution to core melt frequency from classes of sequences induced by various initiating events; modifications, both hardware and procedural, which have been implemented to address problems identified in the conduct or as a result of PRAs; insights into PRA methodologies; and the contribution to measures of risk (core melt frequency and consequences of radioactive releases) from systems, components and events.
These reports are being provided to you, as well as all other licensees, in advance of formal publication for your information. Your comments and suggestions are welcome on these reports.
Sincerely, George E. Lear, Director Project Directorate #1 Division of PWR Licensing-A
Enclosures:
As Stated cc:
w/o Enclosures See Next Page Office:
LA/PAD#1 W /PA 1
PD/PAD#1 Surname:
PShuttle #i1 RDudley/tg GLear Date:
03/S /86 03/
/86 03/
/86 9603140085 860307 PDR ADOCK 05000206 P
Mr. Kenneth P. Baskin San Onofre Nuclear Generating Station Southern California Edison Company Unit No. 1 cc Charles R. Kocher, Assistant Joseph 0. Ward, Chief General Counsel Radiological Health Branch James Beoletto, Esquire State 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. Stephen B. Allman 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, California 95814 Regional Administrator, Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane Walnut Creek, California 94596
DISTRIBUTION:
Docket No.
50-206 NRC PDR Local PDR GLear OELD E. Jordan B. Grimes J. Partlow R. Dudley PShuttleworth ACRS (1)
PD#1 r/f PD#1 s/f