05000334/LER-1981-010-03, /03L-0:on 810121,RCS Loop 1 Low Flow Channel 414 Annunciator Began Intermittently Flashing in Alarm.Caused by Low Voltage Input to Transmitter.Annunciator Adjusted & Channel Returned to Svc 810123

/03L-0:on 810121,RCS Loop 1 Low Flow Channel 414 Annunciator Began Intermittently Flashing in Alarm.Caused by Low Voltage Input to Transmitter.Annunciator Adjusted & Channel Returned to Svc 810123

ML20003C107
Person / Time
Site:	Beaver Valley
Issue date:	02/20/1981
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20003C105	List: 05000334/LER-1981-010-03, /03L-0:on 810121,RCS Loop 1 Low Flow Channel 414 Annunciator Began Intermittently Flashing in Alarm.Caused by Low Voltage Input to Transmitter.Annunciator Adjusted & Channel Returned to Svc 810123 05000334/LER-1981-011-03, /03L-0:on 810121,electrolyte Detectors 101A & B Found Not Dripping & 101C Detector Had Slow Drip Rate.Cause Under Investigation.Detectors Adjusted,Repaired & Declared Operable on 810129 05000334/LER-1981-012-03, /03L-0:on 810203,all Three Chlorine Detectors Failed Drip Rate Criteria.Cause Under Investigation. Detectors Repaired & Declared Operable 810204 05000334/LER-1981-013-03, /03L-0:on 810121,routine Lab Analysis Showed That Methyl Iodide Removal Efficiency for Bed Had Fallen Below Acceptable Level Resulting in Inoperability of Main Filter Bank 1A.Caused by Worn Out Charcoal Bed.Bank Repacked ML20003C104
References
LER-81-010-03L, LER-81-10-3L, NUDOCS 8102260636
Download: ML20003C107 (2)

LER-1981-010, /03L-0:on 810121,RCS Loop 1 Low Flow Channel 414 Annunciator Began Intermittently Flashing in Alarm.Caused by Low Voltage Input to Transmitter.Annunciator Adjusted & Channel Returned to Svc 810123

Event date:
Report date:
3341981010R03 - NRC Website

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g i associated bistable tripped when it was found reading the lowest of the three Loop 1l [TTTl I flow channels. Power operation continued as per Technical Specification 3.3.1.1.

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[ r 1l 1/23/81. Continuing problems with this channel have developed and are now under

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Attach =ent To LER 81-10/03L 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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