ML20129H899
| ML20129H899 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 05/17/1985 |
| From: | Mangan C NIAGARA MOHAWK POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| (55(E)-85-15), (NMP2L-0412), (NMP2L-412), NUDOCS 8506070687 | |
| Download: ML20129H899 (2) | |
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AWK NIAGARA MOHAWK POWER CORPORATION /300 ERIE BOULEVARD WEST, SYRACUSE. N Y.13202/ TELEPHONE (315) 4741511 May 17,1985 (NMP2L 0412)
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 missing internal jumpers in the limit switch assembly of motor-operated valve 2CSL*M0V107. This problem was reported via tel-con to J. Linville of your office on April 12, 1985.
Very truly yours, C. V. Manga Vice President Nuclear Engineering and Licensing CVM/GG/cla xc: Director of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 R. A. Gramm, NRC Senior Resident Inspector
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NIAGARA M0 HAWK POWER CORPORATION.
NINE MILE POINT - UNIT ~2 DOCKET N0. 50-410 Final Report for Problems Concerning Missing Internal Jumpers in Motor-0perated Valve Limit Switch Assembly (55(e)-85-15)
Description of the Problem An inspection of the wiring in the limit switch assembly of motor-operated valve 2CSL*M0V107 identified missing jumpers the absence of which would make the valve inoperable. The internal jumpers are required for opening and closing operation of the valve as well as for protecting the valve motor during overload conditions.-
Analysis of Safety Implications t
The missing fumpars could prevent the motor-operated valve 2CSL*MOV107 from operating.
Lts operation is required to protect the low pressure core spray pump and motor from damage due to overheating by maintaining the minimum flow return to the suppression pool. The problem could have prevented the low pressure core spray pump from performing its intended design function.
Therefore, the safety of operations of the plant could have been adversely affected.
Corrective Actions The missing jumpers were installed in accordance with Drawing No.
12177-EE-9SL-4 as indicated in Deficiency Report (DR) No M00164.
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