ML19343A192

Responds to IE Bulletin 79-14, Seismic Analysis for As-Built Safety-Related Piping Sys. Long-term Evaluation of Any as-built Discrepancies Will Be Based on Appropriate Loading Combination for Design & Operation

ML19343A192
Person / Time
Site:	Beaver Valley
Issue date:	09/11/1980
From:	Dunn C COMMONWEALTH EDISON CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
42636, IEB-79-14, NUDOCS 8009160374
Download: ML19343A192 (2)

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7" September 11, 1980 United States Nuclear Regulatory Commission Office of Inspection and Enforcement Attn: Boyce H. Grier, Regional Director Region I 631 Park Avenue King of Prussia, Pennsylvania 19406

Reference:

Beaver Valley Power Station, Unit No.1 Docket No. 50-334, License No. DPR-66 IE Bulletin 79-14 Gentlemen:

Duquesne Light Company letter dated August 14, 1980, to Mr. Boyce H.

Grier, reports the current status of the ongoing effort in response to l

IE Bulletin 79-14.

This schedule is based on evaluating any "as-built"

' discrepancies against the interim pipe stress and supports criteria described in the Report on the Reanalysis of Safety Related Piping Systems for Beaver Valley Unit No.1 dated August 3,1979, and the NRC's order for i

termination of the proceeding initiated by the show cause order dated March 31, 1979, for the Beaver Valley Power Station Unit No.1 issued on August 8, 1979.

This interium criteria considers the Design Basis Earth-quake Inertia plus dead load (DBEI+DL) case and includes the continuing 4

commitment.to. shut the plant down for inspection in the event that.a veri-3 fied seismic acceleration of 0.01g or more is registered by the in,nlant

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acceleremeters. Any discrepancies which result-iwierstreis conditions.

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when evaluated using the interim criteria will be declared non-conformances and will be reported in accordance with the requirements of IE Bulletin 79-14.

The long term evaluation of any "as-built" discrepancies will be

- based on the appropriate loading combination for-bot ~n the Design Basis

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and Operating Basis Earthquakes. Any modification required to rectify

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any overstressed condition resulting from the application of the long term criteria will be acccmplished prior to startup af ter the next refueling

/}O37 outage.

Very truly yours, I O N

C. N. Dunn l

Vice Presicent, Operations 4---

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Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 IE Bulletin 79-14 Page 2 cc: Mr. D. A. Beckman, Resident Inspector U.S. Nuclear Regulatory Commission Beaver Valley Power Station Shippingport, Pennsylvania 15077 U.S. Nuclear Regulatory Commission c/o Document Management Branch Washington, D.C.

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