ML20024E454

LER 83-017/03L-0:on 830706,power Supply Circuit Breaker for Oily Water Separator Effluent Flow Monitor (FR-251) Tripped Open & Would Not Reset.Cause Undetermined.Breaker Replaced. W/830804 Ltr

ML20024E454
Person / Time
Site:	Diablo Canyon
Issue date:	08/04/1983
From:	Kelly W, Shiffer J PACIFIC GAS & ELECTRIC CO.
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
LER-83-017-03L, LER-83-17-3L, NUDOCS 8308150067
Download: ML20024E454 (2)

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EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h 1 o 12 l l Prior to fuel load, while performing a routine surveillance on the oily water l i o 12 l l separator effluent flow monitor (FR-251) it was determined to be inocerable. I l o la l I Technical Specification 3.3.3.9 Action Statements were observed and no radio- l Io 15 I I active effluents were released. This event hac in nn wav affnetod the nuhlic I l o la l l health and safety. Reportable per Technical Specification 6.9.1.13.b. I Io17II I Ioisll l

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h I 'lo ll The oower suoplv circuit breaker for FR-251 was trioned ooen and would not reset. I l ili I l The breaker was reolaced with a snare. tested and FR-251 was restored to service i M l within 4 hnure. Thn hrnakor failurn wae analv7pd and dntormined tn hp an ienlated I I 513 l l case. A record search did not show any previous occurrance of this breaker fail- I 111411 ure. l

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N AME OF PREPARER William J. Kelly PHONE: 805-595-7351

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PACIFIC OAS AND E LE C T RIC C O M PANY 3FI@7'*#13 {

77 BE ALE STREET . SAN FR ANCISCO, CAltFORNI A 94106= (415) 781. A211. TWX 910 372 6587 JAMESg,gFMA DEPANf ME NT 08 NUCtf AM Pt. ANT Orf RATONS NtJCLE AM POWFH GENERATCN August 4, 1983 Mr. J. B. Martin, Regional Ahinistrator U. S. Nuclear Regulatory Commission, Region V 1450 Maria Inne, suite 210 Walnut Creek, CA 94596-5368 Re: Docket No. 50-275, OL-DIR-76 Diablo Canyon Unit 1 Licensee Event Report 83-017/03L-0 Inoperable Effluent Flow Monitor

Dear Mr. Martin:

Pursuant to Section 6.9.1.13.b of the Technical Specifications, Appendix A to the Diablo Canyon Unit 1 Operating License, the enclosed Licensee Event Report is submitted concerning an inoperable Oily Water Separator Effluent Flow Monitor (9-251).

'lhis event has in no way aIfected the public's health and safety.

Very truly yours, s

u Enclosure cc: Mr. G. W. Knighton Director, Office of Management Infonnation and Program Control Service List 3-M