ML18052A245
| ML18052A245 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 01/09/1986 |
| From: | Thadani A Office of Nuclear Reactor Regulation |
| To: | Berry K CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| NUDOCS 8601220525 | |
| Download: ML18052A245 (2) | |
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- -.:.t Docket No. 50-255 Mr. Kenneth W. Berry Di~~ct6r~ Nuclear Licensing Consumers Power Company 1945 W. Parnall Road Jackson, Michigan 49201
Dear Mr. Berry:
SUBJECT:
REPORTS ON PRA INSIGHTS January 9, 1986 NRC & Local PDR ACRS (10)
Palisades File JPartlow BGrimes TWamba~h PWR8 Reading EJordan FMiraglia PKreutzer AThadani _
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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 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 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*
vu 1nerabi1 iti es.
In particular, these reports contain discussions of: general insights,on plant strengths and weaknesses gained from PRAs; the contribution to core melt frequ.ency **
-f~om 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 methodologJ~s; and the contribution to measures of risk (core melt frequency *and con~equence~,.
of radioactive releases) from systems, components ~nd ev~nts.
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These reports will be published in their final forms in approximately two mont~s. *:
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.
Enclosures:
As.Stated Sincerely,.
/SI Ashok Thadqni, Director PWR Project Directorate #8 Division of PWR Licensing.- B *
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Mr. Kenneth W. Rerry Consum~rs Power Company cc:
M. I. Miller, Esquire Isham, Lincoln & Beale 51st Floor Three First National Plaza Chicago, Illinois 60602 Mr. Thomas A. McNish, Secretary Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Judd L. Bacon, Esquire Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Jerry Sarno Township Supervisor Covert Township 36197 M-140 Highwqy Covert, Michigan *49043 Office of the Governor Room 1 - Capitol Building Lansing, Michig_an 48913 Palisades Plant ATTN:
Mr. Joseph F. Firlit Plant General Manager 27780 Blue Star Memorial Hwy.
Covert, Michigan 49043 Resident Inspector c/o U.S. NRC Palisades Plant 27782 Blue Star Memorial Hwy.
Covert, Michigan 49043 Palisades Plant Nuclear Facilities and Environmental Monitoring Section Office Division of Radiological Health P.O. Box 30035 Lansing,.Michigan 48909