ML20127L339
| ML20127L339 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 04/29/1985 |
| From: | Mangan C NIAGARA MOHAWK POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| (55(E)-85-12), (NMP2L-0393), (NMP2L-393), NUDOCS 8505220322 | |
| Download: ML20127L339 (2) | |
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HBAGARA RIONAWK POWER CORPORAT10N/300 ERIE BOULEVARD WEST, SYRACUSE, N.Y.13202/ TELEPHONE (315) 4741$11 April 29,1985 (NMP2L 0393)
Mr. R. W. Starostecki, Director U. s. Nuclear Regulatory Connission Region I Division of Reactor Projects 631 Park Avenue King of Prussia, PA 19406 Re: Nine Mile Point Unit 2 Docket No. 50-410 bear W. Starosteckt:
Enelosed is a ff nel report in accordance with 10CFR50.55(e) for the problem concerning the use of unapproved insulating materials / methods for motor l eads.
This problem was reported via tel-con to J. Linville of your staff on March 29,1985 Very truly yours, Vice Pres ent Nuclear Engineering and Licensing xc: Director of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 R. A. Gramm, NRC Senior Resident Inspector ProjectFile(2)
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r NIAGARA M) HAWK POWER CORPORATION NINE MILE POINT - UNIT 2 DOCKET NO. 50-410 Final Report for a Problem Concerning Insulation on Motor Leads
- ( 55(e )-85-12)
Description of the Problem Quality Assurance Category I
service water pump strainer motor. lead connections were sealed with insulating material not conforming to Electrical Installation Specification No. MP2-E061A.
This nonconformance was documented on Nonconformance and Disposition Report No. 9727.
To ensure that the approved insulating material was used to seal lead connections' of other Category 'I motors (excluding motors with terminal blocks), Field Quality Control reinspected the motors for which work had been completed and accepted. This inspection identified a nonconforming connection to the low pressure core spray pump, 2CS L*P2, which was documented on Nonconformance and Disposition Report No.10127.
Analysis of Safety Implications Under certain condi tions, the use of unapproved methods / materials for insulating motor connections could result in the short-circuiting of motor leads, phase to phase or phase to ground, rendering the equipment inoperable, thus affecting the design function of the safety-related systems. There fore, had this condition remained uncorrected, it could have adversely affected the safety of operations of the plant.
Corrective Action The unapproved insulating materials have been removed and the terminations have been repaired with approved materials in accordance with Engineering and Design Coordination Report No. 52,527A and Nonconformance and Disposition
- Report Nos. 9727 and 10127