ML19263D345

LER 79-017/03L-1:on 790130,photoelectric Smoke Detector Ds 8605-E in Emergency Control Generator 1-1 Area Not Functional During Surveillance Testing.Caused by Detector Failure.Fire Watch Patrol Maintained in Area

ML19263D345
Person / Time
Site:	Davis Besse
Issue date:	02/26/1979
From:	Chesko R TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19263D340	List: ML19263D339 ML19263D345
References
LER-79-017-03L, LER-79-17-3L, NP-33-79-22, NUDOCS 7903270479
Download: ML19263D345 (2)

Text

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION (7 7M

. LICENSEE EVENT REPORT bNTROL BLOCK: l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 .

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8 60 61 DOCK ET NUveER bd 69 EVENT DATE 74 75 HEPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h

! o l 2 l l While conducting surveillance testing, it was determined that Photoelectric Smoke l lo l3 l l Detector DS 8605-E in the Fnergency Diesel Generator 1-1 area was not functional. l o 4 l DS 8605-E was declared inoperable at 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br /> on 1/30/79 which placed the unit in l l o l s i l the Action Statement of Tech Spec 3.3.3.8. A fire watch patrol was established and l l Og l was maintained until the detector was declared operable. The four other area photo- l j Og ] electric detectors in this open room were operable . (MP-33-79-22) l 0 H l 7 8 9 80 SYSTEM CAUSE CAUSE COYP. VALVE COLE g CODE SUBCODE COMPONENT CODE SUSCODE SUBCOOE g l A lB l@ ]@ l E @ lI IJl N l S lT l R lU l@ l El@ ] @

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42 43 lPl4l3l5lg 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i l 0 l l The f ailure of Photoelectric Detector DS 8605-E was the cause of the occurrence. A l Jy [ fire watch patrol was maintained in the arca, and a new detector wat o+~d . The jg l new detector was installed under Maintene.:e Work Order I&C 013-005-79 and retested l Jg l satisfactorily at 1L29 hours on Febrt ary 28, 1979, removing the unit from the Action l f

]gl Statement of Technical Specification 3.3.3,];

l 8 9 80 St S  % POWE R oTHER STATUS ISCO RY OfSCOVERY DESCRIPTION s

ii l El@ l 0 l 9 l 2 l@QA__ l [BJ@l, Surveillacce Test ST 5016.04 l

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NAME OF PREPARER PHONE.

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TOLEDO EDISON COMPA';Y DAVIS-BESSE NUCLEAR POWER STATION UNIT ONE SPECIAL REPORT 1l DATE OF EVENT: January 30, 1979 FACILITY: Davis-Besse Unit 1 Photoelectric Detector DS 8605-E did not pass IDENTIFICATION OF OCCURRENCE:

Surveillance Test ST 5016.04 i

i The unit was in Mode 1 with Power (MWI) = 2550, Conditions ?rior to Occurrence: I and Load (Gross MWE) = 825.

Description of Occurrence: While conducting Surveillance Test ST 5016.04, " Detector Channel Functional and Supervisory Circuits Checks", it was determined that Photo-electric Smoke Detector DS 8605-E in the Emergency Diesel Generator This lead 1-1 area to DS 8605-E was being g not functional and a test deficiency was p epared.

declared inoperable at 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br /> on Janus v 30, 1979, which placed the unit in the Action Statement of Technical Specification 3.3.3.8, which specifies the'ainimum fire detection instrumentation and requires with one or more detectors inoperable 1

that within one hour, a fire watch patrol be esAablished fire watchand the was patrol instrument (s) established restored to operable status within 14 days.

at that time. .

Designation of Apparent Cause of Occurrence: The failure of Photoelectric Detector DS 8605-E was the cause of the occurrence.

Analysis of Occurrence: The f our other area pnotoelectric detectors in this open s

rec _ are operable, and a fire watch patrol was naintained in this area.

1l Corrective Action: A fire watch patrol was maintained in the area, and a new detec-1 tor was ordered. The new detector was installed under Maintenance Work Order I6C 013-005-79 and retested satisfactorily at 1529 hours0.0177 days <br />0.425 hours <br />0.00253 weeks <br />5.817845e-4 months <br /> on February 28, 1979, removing the unit from the Action Statement of Technical Specification 3.3.3.8.

Failure Data:

There have been no p;eviously reported failures of photoelectric detectors.

LER #79-017 O