ML20107H128

Informs That Experience at Some BWR Plants W/Mark I Containment Has Shown That in Some Cases Design of Relief Valve Line Restraints Inside Torus May Be Inadequate

ML20107H128
Person / Time
Site:	Oyster Creek
Issue date:	09/10/1975
From:	Lear G Office of Nuclear Reactor Regulation
To:	Finfrock I JERSEY CENTRAL POWER & LIGHT CO.
Shared Package
ML18039A986	List: IR 05000219/1970007 IR 05000219/1971001 IR 05000219/1971002 IR 05000219/1971003 IR 05000219/1971004 IR 05000219/1971005 IR 05000219/1972001 IR 05000219/1972002 IR 05000219/1972003 IR 05000219/1972004 IR 05000219/1972005 IR 05000219/1972013 IR 05000219/1972025 IR 05000219/1973003 IR 05000219/1973004 IR 05000219/1973006 IR 05000219/1973007 IR 05000219/1973008 IR 05000219/1973009 IR 05000219/1973010 IR 05000219/1973011 IR 05000219/1973012 IR 05000219/1973013 IR 05000219/1973014 IR 05000219/1973015 IR 05000219/1973016 IR 05000219/1973017 IR 05000219/1973019 IR 05000219/1973020 IR 05000219/1973021 IR 05000219/1973022 IR 05000219/1973023 IR 05000219/1974001 IR 05000219/1974002 IR 05000219/1974003 IR 05000219/1974004 IR 05000219/1974005 IR 05000219/1974006 IR 05000219/1974007 IR 05000219/1974008 IR 05000219/1974009 IR 05000219/1974010 IR 05000219/1974011 IR 05000219/1974012 IR 05000219/1974013 IR 05000219/1974014 IR 05000219/1974015 IR 05000219/1974016 IR 05000219/1974017 IR 05000219/1974018 ... further results
References
FOIA-95-258 NUDOCS 9604240037
Download: ML20107H128 (2)

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a UNffED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON. D. C. 20555 SEP 1 0 575 Docket

. 50-219 4

e Jersey Central Power & Light Company ATTN:

Mr. I. R. Finfrock, Jr.

Vice President - Generation Madison Avenue at Punch Bowl Road Morristown, New Jersey 07960

.Centlemen:

OYSTER CREEK Experience at some BWR plants with Mark I containments has shown that in some cases the design of the relief valve line restraints inside the torus may be inadequate.

At some plants, the original restraints have j

I been replaced.

Because of the design inadequacy observed at some plants, we request that you perform an analysis to confirm that the I

relief valve line restraints at your plant are adequate.

We request f

l that you submit a' summary of your analysis within 45. days of the receipt of this letter.

Your submittal should provide suf ficient information to enabl.e us to perform an independsnt evaluation ot your analysis.

In addition, this letter confircis cur recent oral request that you inspect, at your earliest opportunity, the relief valve lines and their restraints inside the torus for indications of damage or degradation i

if no inspection of this type has been performed subsequent to relief valve blowdown.

Please contact us if you have any questions regarding our requests.

This request for generic information was approved by GAO,under a blanket clearance number B-180225 (R0072); this clearance' expires July 31, 1977.

Sincerely,

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p f

h George

, Chief

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Operating Reactors Branch #3 Division of Reactor Licensing cc:

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Jersey Central Power & Light Co.

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cc:

G. F. Trowbridge, Esquire Shaw, Pittman, Potts, Trowbridge 6 Hadden Barr Building 910 17th Street, N. W.

Washington, D. C.

20006 Jersey Central Power 6 Light Company ATTN: Mr. Thomas M. Crimmins,, Jr.

Safety and Licensing Manager GPU Service Corporation 260 Cherry Hill Road Parsippany, New Jersey O'/054 Anthony Z. Roisman, Esquire Berlin, Roisman 6 Kessler 1712 N Street, N. W.

Washington, D..C.

20036 Paul Rosenberg, Esquire Daniel Rappoport, Esquire 2323 S. Broad Street Trenton, New Jersey 08610 Honorable Joseph W. Ferraro, Jr.

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Deputy Attorney General

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-State of New Jersey 101 Commerce Street - Room 208 Newark, New Jersey 07102 Burtis W. Horner, Esquire Stryker, Tams and Dill 55 Madison Avenue Morristown, New Jersey 07960 George F. Kugler, Jr.

Attorney General State of New Jersey State House Annex Trenton, New Jersey 08625 4

Ocean County Library j

15 Hooper Avenue Toms River, New Jersey 08753 i

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