ML18051A468
| ML18051A468 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 06/10/1983 |
| From: | Wambach T Office of Nuclear Reactor Regulation |
| To: | Vandewalle D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| LSO5-83-06-025, LSO5-83-6-25, TAC-48727, NUDOCS 8306160396 | |
| Download: ML18051A468 (4) | |
Text
,.
Docket No. 50-255 LS05-83-06-025 Mr. David J. VandeUalle Nuclear Licensing Administrator Consumers Power Company 1945 W. Parnall Road Jacksoni Michigan 49201
Dear Mr. VandeWalle:
June 10, 1983
SUBJECT:
INTEGRATED PLANT SAFETY ASSESSMENT REPORT (IPSAR) SECTION 4.26, ELECTRICAL PENETRATIONS OF REACTOR CONTAINMENT - PALISADES PLANT The final rntegrated Plant Safety Assessment Report (IPSAR) for Palisades (NUREG-0820*, Section 4.26) referenced a letter from Consumers Power
_Company (CPCo) dated June 15, 1981.
In that letter CPCo agreed to review the containment electrical penetrations and document the following:
(1) Appropriate interrupting capacity for all power circuit penetrations, (2) Appropriate interrupting capacity for sampled* control and instrument (3)
(4) circuit penetrations, Appropr1 ate survei 11 ance testing, ~or circuit protective devices; and
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Modifications needed to conform to current licensing criteria.
CPCo also proposed to complete this review and provide a schedule for modifications by September 30, 1982.
CPCo letters of October 12, 1982 and February 11, 1983, have kept the staff informed of your progress on this project.
This issue was not evaluated in the integrated assessment because CPCo had proposed t!lis review in June 1981 before the integrated assessment.
The staff has evaluated this issue for other plants, R. E. Ginna (NUREG-0821), Oyster Creek (NUREG-0822), Dresden Unit 2 (NUREG-0823), Millstone Unit l (NUREG-0824), and Yankee (NUREG-0825), and _concluded that no further action was required for these plants. Our conclus.ion was based *.upon the very sma 11 contri bu ti on of e 1 ectri cal penetration fa i 1 ure to containment failure by leakage (i.e., the stte of a potential leakage path is small and the probability of penetration electrical failure resulting in leakage is low).
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. NRC FORM 318 (10*80) NRCM 0240 OFFICIAL RECORD COPY USGPO: 1981-335-960
Mr. David J. VandeL~a 11 e Based upon the information contained in the licensee's letters dated June 15, 1981, October 12, 1982 and February 11, 1983, the staff concludes that the design of the Palisades electrical penetrations are similar to other SEP plants, that the probability of electrical fail-ure is low and that any leakage path due to penetration failure would be small. Therefore, we consider this issue to have been completed satisfactorily and further action by the licensee is not required.
cc:
See next page Sincerely, Orlgin~l s.fgnerd OJ'&'
Thomas V. ~~ambach, Project Manager Operating Reactors Branch No. 5 Division of Licensing Please Note:
This closes out TAC #48727.
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NRC FORM 318 (10-80) NRCM 0240 OFFICIAL RECORD COPY USGPO: 1981-335-960
Mr. David -
vJhile CPCo has been working on this project, the staff has evaluated this issue in conjunction with the integrated assessments for R. E. Ginna (NUREG-0821), Oyster Creek (NUREG-0822), Dresden Unit 2 (NUREG-0823) ~ and Millstone Unit 1 (NUREG-0824).
In the course of.~~he.s_~ reviews, the staff has concluded that the contribution of electrical penetration failure to containment releases due to leakage after an accident is very small based on the results of the risk perspectives.
Because of the small risk that failure of electrical penetrations present to the public health and safety and because satisfactory progress is being made to correct the electrical circuits at Palisades, we conclude that further regulatory staff attention to this issue is not warra1nted.
Accordingly, we consider this issue to have been completed satisfactorily.
cc:
See next page Sincerely, Thomas V. Wambach, Project Manager Operating Reactors Branch No. 5 Division of Licensing Please Note:
This closes out TAC 48727.
NRG FORM 318 (10-80) NRCM 0240 OFFICIAL RECORD COPY USGPO: 1981-335-960
1_< *'..
Mr.
Da 1iid'.'<<J*.*vande~Jalle Nuclear Licensing Administrator Consumers Power Company 1945 W. Parnall Road Jackson, Michigan 49201 cc:
M. I. Miller, Esquire Isham, Lincoln & Beale Suite 4200 One First National Plaza Chicago, Illinois 60670 Mr. Paul A. Perry, Secretary Consumers Power Company 212 West Michiaan Avenue Jackson, Michigan 49201 Judd L. Bacon, Esquire Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 James G. Keppler, Regional Administrator Nuclear Regulatory Commission, Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Township Supervisor Covert Townshi Route 1, Box 10 Van Buren County, Michigan 49043 Office of the Governor (2)
Room 1 - Capitol Building Lansing, Michigan 48913 Palisades Plant ATTN:
Mr. Robert Montross Plant Manager Covert, Michigan 49043 U. S. Envi ronmenta 1 Protecti-orr Agency
- Federal Activities Branch Region V Office ATTN:
Regional Radiation Representative 230 South Dearborn Street Chicago, Illinois 60604 Resident Inspector c/o U. S. NRC Palisades Plant Route 2, P. O. Box 155 Covert, Michigan 49043 Docket f~o. 50-25S~
Palisades Mr. Ronald Callen, Supervisor Advance Planning and Review Section Michigan Public Service Co11111ission 6545 Mercantile Way Post Office Box 30221 Lansing, Michigan 48909.