ML20195E501
| ML20195E501 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 11/03/1988 |
| From: | Danni Smith PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Russell W NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| NUDOCS 8811080138 | |
| Download: ML20195E501 (2) | |
Text
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f PHILADELPHIA ELECTRIC COMPANY
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PEACil BOTIUM AlDMIC PO4 ER STATION 1
R. D.1. Box 20R I
Ocita. Penns)h2nia 17314 nw:a summe-me rueea oe sumusva (717) 4$6 70t4 f
D.M.Smhh Ykr Preudent t
November 3, 1988 l
Docket Mos. 50-277 f
50-278 I
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Mr. W. T. Russell U. S. Nuclear Regulatory Conslission ATTN: Document Control Desk Mail Station P1-137 Washington, DC 20555 i
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SUBJECT:
REPORTABl.E OCCURRENCE - Both Fire Pumps Out Of Service At Peach Bottom Atomic Pcwer Station
Reference:
Peach Bottom Units 2 and 3 Technical Specifications (TS) 3.14.A
Dear Mr. Russell:
I This special report, involving the simultaneous inoperability of both fire pumps, is being submitted pursuant to the referenced Technical Specification and satisfies the 14 day reporting requirements in accordance with TS 3.14.A.3b.
t identification of Occurrence j
At approximately 4:50 AM or October 20, 1988, with Unit 2 in cold shutdown and Unit 3 in the refuel mode, the diesel driven fire pump failed to start automatically during the performance of a surveillance test.
Since the motor driven fire pump was out af service for modifications, the I
failure of the diesel driven fire pump to start rendered both fire pumps
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inoperable and reportable pursuant to the referenced Technical Specification.
i Cause of Occurrence The exact cause of the pump failure cannot be determined because the test was terminated and the pump logic reset before the investigation began. Since the system pressure was dropped only 8 psi below the start setpoint and the i
combined instrument tolerances are +/-7 psi, the failure is believed to be the result of an inadequate test.
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estioso13e settos PDR ADOCK 05000277 I
S PDC i
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T0:
Mr. W. T. Russell Page 2 Actions Taken The diesel driven fire pump was subsequently tested successfully and returned to service at approximately 5:00 AM on 10/20/88. Additionally, the auto-start feature of the pump was tested several times on the afternoon of 10/20/88 and every 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> since then. The pump has functioned satisfactorily each time.
Plans and Schedule:
The Surveillance Tests for both fire pumps are in process of revision.
These revisions will require the system pressure to be dropped significantly below the setpoint before termination of testing.
The piping modifications are expected to be complete by 12/1/88. The motor driven fire pump will then be returned to service.
5incerely, Ql/pyL Thys.tf cc:
W. T. Russell, Administrator, Region 1 USNRC R. E. Martin, USNRC Project Manager T. P. Johnson, USNRC Senior Resident inspector T. E. Hagette, State of Maryland