ML20100F289
| ML20100F289 | |
| 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 | |
| (55(E)-84-30), (NMP2L-0244), (NMP2L-244), NUDOCS 8412060514 | |
| Download: ML20100F289 (2) | |
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f M Y NIAGARA R uMOHAWK NIAGARA MOHAWK POWER CORPORATION /300 ERIE BOULEVARD WEST, SYRACUSE, N Y.13202/ TELEPHONE (315) 4741511 November 16, 1984 (NMP2L 0244)
Mr. R. W.'Starostecki, Director U. S. Nuclear Regulatory Comission 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 a final report in accordance with 10CFR50.55(e) for. the problem concerning tne use of a nonqualified breaker in a Quality Assurance Category I
. battery charger. This problem was reported to P. Russ of your staff on
' August 7,
1984.
An interim report was submitted via our letter dated September 6,1984 Very truly yours, C. V. Mangan Vice President Nuclear Engineering and Licensing
'CVM/GG/dd Enclosure 1
l xc: Director of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, DC.20555-
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R. A. Gram, NRC Resident Inspector l-Project File'(2)
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NIAGARA MOHAWK POWER CORPORATION
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NINE MILE ~ POINT UNIT 2.
DOCKET NO. 50-410
. Final Report for a Problem Concerning the Use of Nonqualified Breakers in Battery Chargers (55(e)-84-30)
Description'of the Problem An inspection of the Division III' battery chargers. 2BYS*CHGR2C1 and 2BYS*CHGR2C2 indicated that the de circuit breakers actually provided were different-from those shown on the bill of material.
The vendor was required to. provide qualified Class.1E circuit breakers manufactured by Westinghouse.
Correct dc circuit breakers were identified on the bill of material, but the
- battery. chargers supplied to the Nine Mile Point 2 site were equipped with nonqualified Square D de circuit breakers.
Analysis of Safety Implications s
Since the subject breakers were not qualified as Class 1E,.it is assumed that the breakers could have failed.
Failure of the circuit breakers would have resulted in the battery chargers not perfonning their intended function, thus eventually resulting.in a loss of Division III de power.
Therefore, had this problem remained uncorrected, it could -have adversely affected the safety of operations of the plant.
Corrective Action The.nonqualified Square D dc. circuit breakers will be replaced with nuclear-qualified de output breakers in accordance with Nonconfonnance and Disposition Report No. 8444 l
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