05000260/LER-1981-036-03, /03L-0:on 810707,alarm for Smoke Detectors in Relay Room Was Received & Would Not Clear.Probably Caused by Grounded Wire in Detector or Cable.Kidde Cpd 1201 Detector Replaced

/03L-0:on 810707,alarm for Smoke Detectors in Relay Room Was Received & Would Not Clear.Probably Caused by Grounded Wire in Detector or Cable.Kidde Cpd 1201 Detector Replaced

ML20009H028
Person / Time
Site:	Browns Ferry
Issue date:	07/28/1981
From:	Holder G TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009H019	List: 05000260/LER-1981-036, Forwards LER 81-036/03L-0 05000260/LER-1981-036-03, /03L-0:on 810707,alarm for Smoke Detectors in Relay Room Was Received & Would Not Clear.Probably Caused by Grounded Wire in Detector or Cable.Kidde Cpd 1201 Detector Replaced
References
LER-81-036-03L-01, LER-81-36-3L-1, NUDOCS 8108050370
Download: ML20009H028 (2)

LER-1981-036, /03L-0:on 810707,alarm for Smoke Detectors in Relay Room Was Received & Would Not Clear.Probably Caused by Grounded Wire in Detector or Cable.Kidde Cpd 1201 Detector Replaced

Event date:
Report date:
2601981036R03 - NRC Website

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PVENI DESCellPTION AND PROB ABLE CONSEQUENCES h k detectors in the relay room was

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to the health or safety of the pu'alic. There are no redundant systems.

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~ 14 J's 36 37 40 41 42 43 44 47 cAtl5E DESCniPTION AND CORRECTIVE ACTIONS Replaced the Kidde CPD 1201 j l'ossible grounded wire in smoke detector or cable.

j,gni smoke detector which had a pitched wire.

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Alarm has remained clear without possible cable short when the alarm cleared.

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9 idor: lid.~ith>n and Um.c-int hin.;f Occurrence A smoke detector in the r$1Ey room a" Ear [ned and would not clear. The alarm could have masked signals from three detectors which are require'd to be operable by T.S. 3.11.C.1.

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tini t 1 in refueling outage.

l Unit 2 at 94%.

- Unit 3 at 98%.

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Possible grounded wire in smoke detector or cable.

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sf (ie. It! t e " c There 'sas no danger to the health or safe; of the public, no release of activity, no damage to the plant or equi,aient, and no resulting signi-1 ficant chain of events.

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Replaced the Kidde CPD 1201 smoke detector which had a t..-

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f.e t i. in Investigation was in progress to locate a possible cable pinched wire.

short when the alarm cleared. Alarm remained cicar without the exact cause being determined. Equipment was successfully tested per SI 4.11.C.1 and 5.

This is considered a random failure and no further recurrence control is required.

. Int e. IMta BFRO-50-259/78009, 80041; 296/7709, 78009, 78028.

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