ML20100E482

Interim Part 21/Deficiency Rept 84-46 Re Variation in Physical Characteristics of Tricentric Valves Supplied by Clow Corp.Initially Reported on 841017.Insp by Clow Corp Requested to Determine If Valves Operate Per Tech Specs

ML20100E482
Person / Time
Site:	Nine Mile Point
Issue date:	11/16/1984
From:	Mangan C NIAGARA MOHAWK POWER CORP.
To:	Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
REF-PT21-85-065-000 (55(E)-84-46), (NMP2L-245), (NMPZL-245), NMP2L-0245, NMP2L-245, PT21-85-065-000, PT21-85-65, NUDOCS 8412060256
Download: ML20100E482 (2)

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• Y NIAGARA NUMOHAWK NIAGARA MOHAWK POWER CORPORATION /300 ERIE BOULEVARD WEST. SYRACUSE. N Y.13202/ TELEPHONE (315) 474-1511 November 16, 1984 (NMP2L 0245)

Mr. R. W. Starostecki, Director U. S. Nuclear Regulatory Commission Region I Division of Project and Resident Programs 631 Park Avenue King of Prussia, PA 19406 Re: Nine Mile Point - Unit 2 Docket No. 50-410

Dear Mr. Starostecki:

Enclosed is an interim report, in accordance with 10CFR50.55(e), for the problem concerning the tricentric valves supplied by Clow Corporation. This problem was reported via tel-con to W. Lazarus of your staff on October 17, 1984.

Very truly yours, C. V. Mangan Vice President Nuclear Engineering and Licensing CVM/GG/dd xc: Director of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, DC 20555 R. A. Gramm, NRC Resident Inspector Project File (2) 8412060256 841116 gDRADOCK 05000410 PDR t i I

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NIAGARA M0 HAWK POWER CORPORATION NINE MILE POINT - UNIT 2 DOCKET NO. 50-410 Interim Report for a Problem Concerning Tricentric Valves Supplied by Clow Corporation (55(e)-84-46)

Description of the Problen It was observed that some of the tricentric valves supplied by Clow Corporation had varying physical characteristics even though their specification requirements were the same. As a result, Clow was requested to inspect the valves and determir. if they would operate as required by the specifications. The inspection identified the following conditions:

1. The cast arrows on the handwheels of valves 2SWP*MOV74A and E were incorrect. The arrow indicated an opening direction, when actual rotation in that direction would close the valve.

2. The limit switches. of the valves 2SWP*MOV74A, C, and E were improperly adjusted.

3. The torque switches on valves 2SWP*MOV74A and E were wired incorrectly.

4. The SMBs, electrical actuators, for valves 2SWP*MOV74A, C, and E were rotated 90 deg. from the mounting position for which they ' were seismically qualified.

Clow also indicated that all valves with vertical shafts should be reviewed for annular key load levels.

The matter is still under investigation and a final report will be submitted by May 15,1984 f

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