ML17278A612
| ML17278A612 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 02/24/1986 |
| From: | Bradfute J Office of Nuclear Reactor Regulation |
| To: | Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| References | |
| NUDOCS 8603030218 | |
| Download: ML17278A612 (4) | |
Text
4 Docket No. 50-397 0
February 2g, 1986 Mr. G.
C. Sorensen, Manager Regulatory Programs Washington Public Power Supply System P.O.
Box 968 3000 George Washington Way Richland, Washington 99352
Dear Mr. Sorensen:
Subject:
Reports on PRA Insights ACRS (10)
DISTR UTION:
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- Attorney, OELD EJordan JPartlow BGrimes 9 Om UO RO O
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Enclosed are two draft reports concerning technical insights gained from Probabilistic Risk Assessments (PRAs).
These reports are the outcome of an on-going 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 types of plants which have been subjected to risk assessments.
In addition, the section on insights into PRA method 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; modifi-
- cations, 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 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 March 25, 1986.
Sincerely,
Enclosures:
As stated
/S/
John Bradfute, Project Manager BWR Project Directorate No.
3 Division of BWR Licensing cc:
See next page BI-JBradfute/hmc 2/m/86 D':DBL EA sam 2
/86
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Mr. G.
C. Sorensen, Manager Washington Public Power Supply System WPPSS Nuclear Project No.
2 (WNP-2)
CC:
Nicholas S. Reynolds, Esq.
Bishop, Liberman,
- Cook, Purcell 5 Reynolds 1200 Seventeenth
- Street, N.W.
Washington, D.C.
20036 Mr. G.
E. Doupe, Esquire Washington Public Power Supply System P. 0.
Box 968 3000 George Washington Way Richland, Washington 99532 Mr. Curtis Eschels, Chairman Energy Facility Site Evaluation Council Mail Stop PY-11 Olympia, Washington 98504 P. L. Powell, Licensing Manager Washington Public Power Supply System P. 0.
Box 968, MD 956B Richland, Washington 99352 Mr. W.
G.
Conn Burns and Roe, Incorporated c/o Washington Public Power Supply System P. 0.
Box 968, MD 994E Richland, Washington 99352 R.
B. Glasscock, Director Licensing and Assurance Washington Public Power Supply System P. 0.
Box 968, MD 280 Richland, Washington 99352 Mr. C.
M. Powers WNP-2 Plant Manager Washington Public Power Supply System P. 0.
Box MD 927M Richland, Washington 99352 Regional Administrator, Region V
U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596
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