ML20087N103
| ML20087N103 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 03/21/1984 |
| From: | Mangan C NIAGARA MOHAWK POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 84-10, NMP2-L-0012, NMP2-L-12, NUDOCS 8404030107 | |
| Download: ML20087N103 (2) | |
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M Y NIAGARA R UMOHAWK NIAGARA MOHAWK POWER CORPORAT10N/300 ERIE BOULEVARD WEST, SYRACUSE, N.Y.13202/ TELEPHONE (315) 474-1511 March 21, 1984 (NMP2 L 0012)
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 backpressure on valves furnished by Clow Corporation (55(e) 10).
This problem was reported via telecon to S. Collins of your staff on February 16, 19E4.
Very truly yours, C. V. Manga Vice President Nuclear Engineering & Licensing CVM/TL:Ja Enclosure xc: Director of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 l
R. Gramm (Resident: Inspector) 8404030107 840321 I
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NIAGARA M0 HAWK POWER CORPORATION NINE MILE POINT UNIT 2 00CKET N0. 50-410 Interim Report for a Problem Concerning Backpressure on Clow Valves (55(e) 10)
Description of the Problem The problem pertains to the tricentric valves furnished by Clow Corporation.
These valves were designed based on the maximum differential pressures applied in the normal flow (to-seat) direction.
A review of design criteria indicates that some of these valves could be subject to backpressure under certain plant conditions. Backpressure was not a design criterion in the design of these valves.
The matter ~is still under ' consideration and a final report will be submitted by April 30, 1984.
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