ML20100D287

Final Deficiency Rept (55(e)-84-47) Re HPCS Sys Battery Terminations.Initially Reported on 841022.Cable Termination Pole & Cells W/Damaged Terminal Post Replaced

ML20100D287
Person / Time
Site:	Nine Mile Point
Issue date:	02/22/1985
From:	Mangan C NIAGARA MOHAWK POWER CORP.
To:	Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
(55(E)-84-47), (NMP2L-0346), (NMP2L-346), NUDOCS 8504020382
Download: ML20100D287 (2)

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>;. .,o Y NIAGARA NUMOHAWK NINE MILE POINT-UNIT TP.O. BOX 63 LYCOMING NY 13093/ TELEPHONE (315) 343-2110 February 22, 1985 (NMP2L 0346)

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 the high pressure core spray system battery terminations. This problem was reported via tel-con to S. Collins of your staff on October 22, 1984 An interim report was submitted via our letter dated November 21, 1984 Very truly yours, C. V. Mangan Vice President Nuclear Engineering and Licensing CVM/GG:cla (0757H) xc: Director of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, DC 20555 R. A. Gramm, NRC Resident Inspector Project File (2)

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r NIAGARA M0 HAWK POWER CORPORATION NINE MILE POINT - UNIT 2 DOCKET NO. 50-410 Final Report for a Problem Concerning the High Pressure Cool Spray System (55(e)-84-47)

Description of the Problem ,

The problem concerns the effect of the termination cables on the seismic qualification of the Class 1E high pressure core spray system battery, Mark No. 28YS* BAT 2C, supplied by General Electric. One 750 mcm external cable per pole was used. .This condition was identified during Nuclear Regulatory Comission's Inspection No. 50-410/84-11. IEEE 344-1975 also states that the effect of electrical connections, conduit, sensing lines, etc., shall be considered.

In addition, subsequent to the identification of the above condition, it was observed that three battery cell connection posts were damaged. The damage is believed to have occurred due to the turning of the post as a result of the stress caused by the 750 mcm cable.

Analysis of Safety Implications The effect of the subject condition on the performance of the battery was not evaluated because the corrective actions outlined below are being taken.

However, a possibility existed that the condition could have prevented -the battery from performing its design function. As a result, the safety of operations of the plant could have been adversely affected.

Corrective Actions

1. The design was changed by Engineering and Design Coordination Report

'No. F41,663 and No. F41,663A to replace one 750 mcm cable termination per pole with one No. 2 AWG cable.

2. The cells, having damaged terminal posts, will be replaced with new cells in accordance with Nonconfomance and Disposition Report No. 8196.

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