05000293/LER-1980-048-03, /03L-0:on 800807,actuation of HPCI & Reactor Core Isolation Cooling Fire Detectors Did Not Annunciate Alarms on Panel in Control Room.Caused by Dirt on Bell,Reducing Audibility & Bad Bulb.Sys Repaired & Returned to Svc

/03L-0:on 800807,actuation of HPCI & Reactor Core Isolation Cooling Fire Detectors Did Not Annunciate Alarms on Panel in Control Room.Caused by Dirt on Bell,Reducing Audibility & Bad Bulb.Sys Repaired & Returned to Svc

ML19337A255
Person / Time
Site:	Pilgrim
Issue date:	09/05/1980
From:	Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19337A249	List: 05000293/LER-1980-048, Forwards LER 80-048/03L-0 05000293/LER-1980-048-03, /03L-0:on 800807,actuation of HPCI & Reactor Core Isolation Cooling Fire Detectors Did Not Annunciate Alarms on Panel in Control Room.Caused by Dirt on Bell,Reducing Audibility & Bad Bulb.Sys Repaired & Returned to Svc
References
LER-80-048-03L, LER-80-48-3L, NUDOCS 8009090376
Download: ML19337A255 (1)

LER-1980-048, /03L-0:on 800807,actuation of HPCI & Reactor Core Isolation Cooling Fire Detectors Did Not Annunciate Alarms on Panel in Control Room.Caused by Dirt on Bell,Reducing Audibility & Bad Bulb.Sys Repaired & Returned to Svc

Event date:
Report date:
2931980048R03 - NRC Website

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• U. S. NUCLE AR CE2ULATO'.Y COMMisslON (7 77) t.tCENSEE EVENT REPORT

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60 61 DOCK ET NUM8 E R 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h [TlT1 l On August 17, 1980, at approximately 1330 hours0.0154 days <br />0.369 hours <br />0.0022 weeks <br />5.06065e-4 months <br /> while conducting surveillance test l

i o i 3, l 8.B.4 entitled, " Smoke and Heat Detection Systems F'.in Process Buildings" actuation l

g lof HPCI and RCIC fire detectors did not annunciate their intended alarms on panel l

[7pq l C114 in the control room. A fire watch was immediately established and a Maintenance l

[Tpp l Request issued. At approximately 2015 hours0.0233 days <br />0.56 hours <br />0.00333 weeks <br />7.667075e-4 months <br /> the same day the system was repaired, l

l o ; 7 l l tested and returned to service.

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l i i o l gnvestigation revealed the dirt collecting on the alarm bell reduced its audibility.l gl The alarm was cleaned and returned to normal operation. Additionally, a bad bulb i

,, i.,, l which illuminated on alarms from the RCIC quadrant was replace.

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% PcWER OTHER STATUS DISC Y

DISCOVERY DESCRIPTION W @ l1l0l0l@l N.A.

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RELEASED OP RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE d h l_Zj@l N.A.

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l 1 6 PERSONNEL EXPOS ES NUM8ER TYPE oESCRIPTION l0l0l0l@ W @l N.A.

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8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY TYPE

DESCRIPTION

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