ML20107F091

Ack Receipt of Requesting Review of Design Bases for Forked River Reactor Vessel Support Sys

ML20107F091
Person / Time
Site:	05000363
Issue date:	12/29/1975
From:	Finfrock I JERSEY CENTRAL POWER & LIGHT CO.
To:	Parr O NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
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References
FOIA-95-258 NUDOCS 9604220215
Download: ML20107F091 (1)

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Jersey Central Power & Light Company J y

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W MADISON AVENUE AT PUNCH BOWL ROAD

• MORRISTOWN, N. J. 07900

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,1 Ss l December 29, 1975 Mr. Olan D. Parr, Chief

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Ligh(t Water Reactors

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Project Branch 1-3 J

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Divi'sion of Reactor Licensing f

U.S.;Nucicar Regulatory Commission h, %

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Dear Mr. Parr:

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SUBJECT:

FORKED RIVER NUCLEAR GENERATIAG STATION

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~ DOCKET NUMBER 50-363

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TRANSIENT TO LOADS ON REACTOR VESSEL SUPPORTS In your letter of November 25, 1975, you requested a review of the design bases for the Forked River reactor vessel support system. This j

subject of reactor cavity pressurization was addressed in the Forked River j

PSAR in Amendment 9 (Question 14.8).

Pressures were calculated modelling the reactor cavity as a singic node. The forces which were considered to act on the vessel were the blowdown jet forces at the location of the rupture. Transient differential pressures in the annualar region and across the core barrel were not part of this analysis, l

We have been continuously aware of the licensing history of reactor cavity pressurization problems and were reevaluating the adequacy of the vessel supports based on a multinode analysis when Forked River was delayed.

The revised dynamic analysis accounting for transient differential pressure effects will be completed when the project is reactivated. We will inform you of these results.

Very truly yours,

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Ivan R. Finf' rock, Jr.

q0 Vice President asb f

9604220215 960213 PDR FOIA

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DEKOK95-259 PDR

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