ML19351E955

LER 80-090/03L-0:on 801112,two of Three Chlorine Detectors Failed Surveillance Tests.Caused by Dirt on Wicks & Glass Orifices Preventing Flow of Electrolyte.Detectors Cleaned & Returned to Svc

ML19351E955
Person / Time
Site:	Beaver Valley
Issue date:	12/12/1980
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19351E953	List: ML19351E952 ML19351E955 ML19351E957 ML19351E960 ML19351E962 ML19351E964
References
LER-80-090-03L, LER-80-90-3L, NUDOCS 8012190590
Download: ML19351E955 (2)

Text

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EVENT DESCRtPTION AND PMo8ASLE CONSEQUENCES h l m lOn November 12. 1980 with the plant in the startup mode and low power physics t g

j r.usu l testing in progress, two out of three chlorine detectors failed their surveillance They were declared inoperable in accordance with Technical Specification l l o 4 l test.

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When in operation, the detectors provide automatic isolation of the l l

Throughout l ITTTI l control room ventilation system in the event of a maior chlorine spill.

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ITTT1 I the event, one chlorine detector remained in service as well as .the ability to 1o6a1I manually isolate the control room ventilation system.

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, o l Inside the detectors, the wicks and glass orifices which regulate the flow of 1 I

i i I electrolyte had become dirty, preventing its flow. This fluid is required to l

g i etect d the presence of chlorine. After cleaning them, the detectors passed their l

i 3 l surveillance test and were returned to service on November 23.

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Attachment To LER 80-90/03L '

Beaver Valley Power Station j

Duquesne Light Company Docket No. 50-334 I .

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No further information is available or needed to satisfy the reporting

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