ML20029A128
| ML20029A128 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 01/28/1991 |
| From: | Fray J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9102040181 | |
| Download: ML20029A128 (2) | |
Text
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e CCN.91-14012 PillLADELPilIA ELECTRIC COMPANY l'IActi IKW1DM AfDMIC l'OWI R STATION It D. I, Ikix 20H
%g M-Delu, itnnsylvania 17314 riu n wrn>w-tus pos sa oe e stsitsun CID WN14 January 20, 1991 Docket Hos. 50-277 50-278 U. S. Nuclear Regulatory Commission ATTH: Document Control Desk Washington, DC 20555
SUBJECT:
Peach Bottom Atomic Power Station - Units 2 & 3 REPORTABLE OCCURRENCE - Diesel Driven Fire Pump Out of Service
REFERENCE:
Technical Specification 3.14.A.2
Dear Sir:
This special report, involving the inoperability of the diesel driven fire pump, is being submitted pursuant to the referenced Technical Specification.
Identification of Occurrence On January 7, 1991 at 5:45 pm with Unit 2 and 3 operating at 100% power, the diesel driven fire pump was out of service in excess of seven days. This condition is reportable pursuant to the referenced Technical Specification.
Cause of Occurrence The pump was rendered inoperable on December 31, 1990 at 5:45 pm during performance of the monthly functional test. The voltage regulator for the diesel-mounted generator failed, allowing the generator to produce a higher than rated voltage. This higher voltage burned-out three control relays in the controller. These relays signal to the controller logic that the engine has started.
9102040181 910128
{DR ADOCK 03000277 PDR y
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Document Control Desk January 28, 1991 Page 2 Actions laken The motor driven fire pump was verified operable and was tested every 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> in accordance with Technical Specification 4.14.A.2.
'The diesel starter and flywheel were inspected and found to be acceptable.
The diesel-mounted generator was rebuilt and re-installed. The control relays and voltage regulator were replaced.
Plan and Schedule The diesel driven fire pump was returned to service on January 7,1991.
Sincerely, cc:
R. A. Burricelli, Public Service Electric & Gas T. M. Gerusky, Commonwealth of Pennsylvania J. J. Lyash, USNRC Senior Resident inspector T. T. Martin, Administrator, Region I, USNRC H. C. Schwemm. Atlantic Electric R. I. McLean, State of Maryland J. Urban, Delmarva Power
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