ML13303B437
| ML13303B437 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 01/08/1986 |
| From: | Rood H Office of Nuclear Reactor Regulation |
| To: | Baskin K, Holcombe J San Diego Gas & Electric Co, Southern California Edison Co |
| References | |
| NUDOCS 8601210526 | |
| Download: ML13303B437 (3) | |
Text
UNITED STATES 0
NUCLEAR REGULATORY COMMISSION o
WASHINGTON, D. C. 20555 JAN 8 1986 Docket Nos.: 50-361 and 50-362 Mr. Kenneth P. Baskin Mr. James C. Holcombe Vice President Vice President - Power Supoly Southern California Edison Company San Diego Gas & Electric Company 2244 Walnut Grove Avenue 101 Ash Street Post Office Box 800 Post Office Box 1831 Rosemead, California 91770 San Diego, California 92112 Gentlemen:
Subject:
Reports on PRA Insights 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 probabilistic risk assessments 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 tynes of plants which have been subjected to risk assessments. In addition, the section on insiqhts into PRA method focuses on areas which are sensitive to the results and the overall perception of olant weaknesses and vulnerabilities.
In particular, these reports contain discussions of:
general insiqhts on plant strengths and weaknesses qained from PRAs; the contribution to core melt frequency from classes of seauences induced by various initiatinq 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.
8601210526 860108
- PDR, ADOCK 05000361 R
-2 These reports will be published in their final forms in approximately two months. These reports are being provided to you, as well as all other licensees, in advance of formal publication for your information. If, after reviewing these reports, you wish to provide comments to the staff, please provide them by February 10, 1986.
Sincerely, ORIGlitAL SIGiED BY Harry Rood, Project Manager PWR Project Directorate No. 7 Division of PWR Licensing-B
Enclosures:
As stated cc:
See next page DISTRIBUTION Docket File 50-361/362 NRC PDR L PDR PBD7 Reading FMiraglia Attorney, OELD EJordan BGrimes JPartlow HRood JLee ACRS (10)
PBD7 7
HRood/yt G
ighton 1/ /86 1/ /86
Mr. Kenneth P. Baskin San Onofre Nuclear Generating Station Southern California Edison Company Units 2 and 3 cc:
Mr. James C. Holcombe Mr. Hans Kaspar, Executive Director Vice President - Power Supply Marine Review Committee, Inc.
San Diego Gas & Electric Company 531 Encinitas Boulevard, Suite 105 101 Ash Street Encinitas, California 92024 Post Office Box 1831 San Diego, California 92112 Charles R. Kocher, Esq.
Mr. Mark Medford James A. Beoletto, Esq.
Southern California Edison Company Southern California Edison Company 2244 Walnut Grove Avenue 2244 Walnut Grove Avenue P. 0. Box 800 P. 0. Box 800 Rosemead, California 91770 Rosemead, California 91770 Dr. L. Bernath Manager, Nuclear Department Orrick, Herrington & Sutcliffe San Diego Gas & Electric Company ATTN:
David R. Pigott, Esq.
P. 0. Box 1831 600 Montgomery Street San Diego, California 92112 San Francisco, California 94111 Richard J. Wharton, Esq.
University of San Diego School of Alan R. Watts, Esq.
Law Rourke & Woodruff Environmental Law Clinic Suite 1020 San Dieao, California 92110 1055 North Main Street Santa Ana, California, 92701 Charles E. McClung, Jr., Esq.
Attorney at Law Mr. V. C. Hall 24012 Calle de la Plaza/Suite 330 Combustion Engineering, Inc.
Laguna Hills, California 92653 1000 Prospect Hill Road Windsor, Connecticut 06095 Regional Administrator, Region V U.S. Nuclear Regulatory Commission Mr. S. McClusky 1450 Maria Lane/Suite 210 Bechtel Power Corooration Walnut Creek, California 94596 P. 0. Box 60860, Terminal Annex Los Angeles, California 90060 Resident Inspector, San Onofre NPS c/o U. S. Nuclear Regulatory Commission Mr. C. B. Brinkman Post Office Box 4329 Combustion Engineering, Inc.
San Clemente, California 92672 7910 Woodmont Avenue Bethesda, Maryland 20814 Mr. Dennis F. Kirsh U.S. Nuclear Regulatory Commission -
Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596