ML20129F762
| ML20129F762 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 05/20/1985 |
| From: | Mangan C NIAGARA MOHAWK POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| (55(E)-84-41), (NMP2L-0415), (NMP2L-415), NUDOCS 8506070034 | |
| Download: ML20129F762 (2) | |
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M Y NIAGARA R uMOHAWK NIAG ARA MOHAWK POWER CORPORATION /300 ERIE BOULEVARD WEST, SYRACUSE, N.Y.13202/ TELEPHONE (315) 474-1511 May 20, 1985 (NMP2L 0415)
Mr. R. W. Starostecki, Director U.S. Nuclear Regulatory Commission Region I Division of Reactor Projects 631 Park Avenue King of Prussia, PA 19406 Re: Nine Mile Point - Unit 2 Docket No. 50-410
Dear Mr. Starostecki:
Enclosed is a final report in accordance with 10CFR50.55(e) for the problem concerning the Magnetrol level switches.
This problem was reported via tel-con to S. Collins of your office on September 26, 1984 An interim report was submitted via our letter dated October 25, 1984.
Very truly yours, C. V. Mangan Vice President Nuclear Engineering and Licensing CVM/GG/cla i
xc: Director of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 R. A. Gramm, NRC Senior Resident Inspector Project File (2) 8506070034 850520 gDR ADOCM 05000410 PDR
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.V NIAGARA M0 HAWK POWER CORPORATION NINE MILE POINT - UNIT 2 DOCKET NO. 50-410 Final Report for a Problem Concerning Magnetrol Level Switches (55(e)-84-41 )
Description of the Problem The problem pertains - to Magnetrol level switches, Model No. C-751.
These switches are manufactured by Magnetrol Company and are supplied to Nine Mile Point - Unit 2 by General Electric.
General Electric's Early Warning Notice No. 47 indicated that during a high energy line break the switch gasket could fail, thus resulting in a failure /short of the microswitch.
The - failure of the switch could result in the loss of safety-related de power supply.
The subject switches are used in safety 9 sted systems.
Analysis of Safety Implications
~ Subsequent environmental qualification testing for these switches shows that these devices meet the environmental qualification requirements for Nine Mile Point - Unit 2 and therefore do not present any safety implications.
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