05000334/LER-1981-039-03, /03L-0:on 810422,w/plant at 99% Power,Three Chlorine Detectors Failed to Meet Min Electrolyte Drip Rate Criteria.Caused by Glass Orifices Blocking Flow of Electrolyte.Wicks Replaced & Orifices Cleaned

/03L-0:on 810422,w/plant at 99% Power,Three Chlorine Detectors Failed to Meet Min Electrolyte Drip Rate Criteria.Caused by Glass Orifices Blocking Flow of Electrolyte.Wicks Replaced & Orifices Cleaned

ML20004B039
Person / Time
Site:	Beaver Valley
Issue date:	05/21/1981
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20004B035	List: 05000334/LER-1981-039, Forwards LER 81-039/03L-0 05000334/LER-1981-039-03, /03L-0:on 810422,w/plant at 99% Power,Three Chlorine Detectors Failed to Meet Min Electrolyte Drip Rate Criteria.Caused by Glass Orifices Blocking Flow of Electrolyte.Wicks Replaced & Orifices Cleaned
References
LER-81-039-03L, LER-81-39-3L, NUDOCS 8105270144
Download: ML20004B039 (2)

LER-1981-039, /03L-0:on 810422,w/plant at 99% Power,Three Chlorine Detectors Failed to Meet Min Electrolyte Drip Rate Criteria.Caused by Glass Orifices Blocking Flow of Electrolyte.Wicks Replaced & Orifices Cleaned

Event date:
Report date:
3341981039R03 - NRC Website

text

U. S. NUCLEAR REGULATORY *.t,MMISS:ON NRC FOCM 3Gs DJ71

' t.!CENSEE EVENT REPORT s

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8 60 61 COCKET NUM9(R 68 62 EVENT CATE 74 75 REPORT QATE SO EVENT DESCRIPTION AND PRC8A8LE CONSECUENCES h ITTT1 i On 4/22/81 with the plaat at 99% pCuer, all three chlorine detectors failed to meet l

I I o 121 I the minimum electrolvte drio rate criteria specified in their surveillance test.

1718 hours0.0199 days <br />0.477 hours <br />0.00284 weeks <br />6.53699e-4 months <br />, all three detectors were declared inoperable and the control room l

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I n p s i ! ventilation system was subsequently placed on full recirculation flow as per l o e s I l Technical Snecification 3.3.3.7.

This is the nineteenth event involving chlorine

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and cleaning the glasa orifices which were blocking the flow of electrolyte.

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the detectors to improve their teliability is a continuing item.

,,;7, } Testing ot l Corrective actions initiated based on this testing will be included in a future

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Attachment To LER 81-39/03L Beaver Valley Power Station Duquesne Light Company Docket No. 50-334 No further information is available or needed to satisfy the reporting requirement.

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