ML20030B943

Submits Final Response to IE Bulletin 79-14, Seismic Analysis for As-Built Safety-Related Piping Sys. Nozzle Load Evaluations Complete & Required Mods Installed,Except for Two Items.Status of Equipment Nozzles Encl

ML20030B943
Person / Time
Site:	Beaver Valley
Issue date:	08/14/1981
From:	Carey J DUQUESNE LIGHT CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
IEB-79-14, TAC-42636, NUDOCS 8108250232
Download: ML20030B943 (3)

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August 14, 1981 15219 United States Nuclear Regulatory Commission Office of Inspection and Enforcement

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Attn: Boyce H. Grier, Regional Director p

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Reference:

Beaver Valley Power Station, Unit No. 1 (h

Docket No. 50-334, Lic' me No. DPR-66 h

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IE Bulletin 79-14 f

Gentlemen:

This le'.;ter is to inform you of the status of the equipment nozzle load evaluations being performed as indicated in attachment B of our report dated April 7, 1981.

All the IEB 79-14 nozzle evaluations have been completed and the required modifications installed except for two items. The subject equipment and other pertinent information is shown on attachment A to this letter.

The vendor of item 1, the control room air conditioning evaporator coils, has informed us that they can not quantify the load carrying capacity of the i

nozzle connections.

Since the units have operated satisfactorily since the plant start up and the calculated loads and seismic contributor are small, we do not categorize this as a safety problem, and we do not intend to perform any modificat 2n.

Item No. 2, the redundant river water control room air conditioning coils are not required for safety reasons due to the presence ofethe two 100% air conditioning units, which are safety grade.

These coils are normally isolated from the river water system and will remain isolated until piping modifications are installed to assure the structural adequacy of the cooling coils.

This equipment will be modified by the end of the next refueling.

We have completed the review and reanalysis in compliance with IEB 79-14 and consider this our final submittal.

If you have any questions concerning this response, please contact my office.

Very truly yours, J. J. Carey Vice President, Nuclear Attachment T0108250232 810814 hY PDR ADOCK 05000334 u

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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, PA 15077 U.S. Nuclear Regulatory Commission c/o Document Management Branch Washington, DC 20555

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DUQUESNE LIGHT COMPANY j

Beaver Valley Power Station - Unit 1 i

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i ATTACHMENT A Status of Equipment Nozzles August 14, 1981 4

EQUIPMENT EQUIPMENT CALCULATED LOADS SEISMIC LOAD AMT. OF 1

NAME MK. NO.

NO. CONN.

FORCE LBS. MOMENT FT. LBS.,

CONTRIBUTION OVERLOAD COMMENTS 1.

Control Room VS-AS-1A 12 27 min 14 min 17% min N/A No vendor i

Air Conditioning VS-AS-1B 76 max 46 max 38% max allowables; 1 a s are Evap. Coil j

minimal i

2.

River Water VS-E-14A 6

123 min 110 min 10% min 65 to Add pipe i

Cooling Coils VS-E-14B 244 max 187 max 29% max f,00%

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