ML20138E123
| ML20138E123 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 11/05/1985 |
| From: | Lempges T NIAGARA MOHAWK POWER CORP. |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| NMP-14686, NUDOCS 8512130348 | |
| Download: ML20138E123 (3) | |
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NMP-14686 NIAGARA MOHAWK POWER CORPORATION NI AGAR A MOHAWK 300 ERIE BOULEVARD WEST SYRACUSE.N Y.13202 November 5, 1985 Dr. Thomas E. Nurley Regional Administrator United States Nuclear Regulatory Commission Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406 RE: Docket 50-220 SPECIAL REPORT Gentlemen:
In accordance with Technical Specification 3.6.7c, we hereby submit the following Special Report concerning an administrative 1y inoperable fire suppression system.
On October 22, 1985, the Nine Mile Point Unit I (NMP1) electric fire pump was removed from service to perform an NRC committed modification.
During the installation, a ground fault was inadvertently induced on station batte y board #11.
The fault was determined to be in the diesel fire pump electrical control circuitry so the battery #11 source was removed from service for troubleshooting. This action rendered the diesel fire pump administrative 1y inoperable since one of its redundant power supplies was disconnected. The fault was subsequently cicared and both fire pumps returned to service on October 23, 1985.
Although the diesel fire pump was declared administrative 1y inoperable 3
due to the absense of one of its redundant control power sources, the normal source from battery #12 was in service which would have provided automatic starting capability for the fire pump. Additionally, the diesel fire pump was capabic of being started manually at any time without any DC control power by utilizing the starting method detailed in surveillance test N1-ST-SA3,
" Diesel Fire Pump Loss of DC Power Air 3 tart Test."
Very truly yours,
//>n<4L fi 01 8512130348 851105 gj u
PDR ADOCK 05000220 Thomas E. Lempges S
PDR Vice President Nuclear Generation TEL/tg cc: Document Control Desk
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NIAGARA MOHAWK PONER CORPORATION TELECOPIER COVER LETTER
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s NIAGARA M0llAWK POWER CORPORATION -
TELECOPY MESSAGE TELEP110NE MESSAGE DATE/ TIME: 10/23/H5!1400 FRON: T, % _ we= *n TO: Dr. Tka?Ag E. Marlev 1-3ks-342552i 1-215_-317-5124 1-115 149-21155 (W rificationi 1-215-317 9114 ivar4 fication)
TO: Director 0f Regulatory Operation From: Niagara Mohawk Power Corporation Nine Mile Point Nucl$ar Station USNRC Region I Unit #1 8
i 631 1stk Avenue PO Box =32 K!ng of Prussis, PA 19406' Lycoming, New York 13093
SUBJECT:
FIRE PROTECTION PROGRAM REPORTS DOCKET,NO. 50-220 LICENSE NO. DPR-63 ASSIC.st.D LER NO. _ _85__-20 REPORT DATE: 1;/04/85
'E78hTDATE: 10/22/35__
s EVENT DESCRIPTION:
Declared Fire Wacer Suppression System administratively inoperabin while removing
- 11 Lattery Board Supply to Diess\\ Fire Pump to trotUlcshoot a ground f ault.
n'tectric Pump marked up concurrencly to perform a n'adification.
l COMPONENIS INVOLVED:
Diesel and Electric Fire Pucp CAUSE AND REMEDIAL ACT;0N Cleared ground f ault and returned #11 Battery Supply to nervice 1130, 10/23/85.
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% THERMAL MW 99.8 FACILITY STATUS:
Shutdown Routine Startup
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Routine Shutdown Refveling i_
g Steady Stage Oper.
n Other Lead Change Not Applicahic
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g A written follow-up report will,ba sent within two weeks.
DATE 10/23/85 TELECOPY TO __
Dr. T.E. Maria, FRON _,,T.W.
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