05000334/LER-1980-099-03, /03L-0:on 801125,RCS Loop 2 Channel 1 Flow Indicator FI-RC-424 Showed Reading Above Surveillance Requirement.Caused by Isolation Amplifier Drift.Isolation Amplifier Repaired

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/03L-0:on 801125,RCS Loop 2 Channel 1 Flow Indicator FI-RC-424 Showed Reading Above Surveillance Requirement.Caused by Isolation Amplifier Drift.Isolation Amplifier Repaired
ML19340D484
Person / Time
Site: Beaver Valley
Issue date: 12/18/1980
From: Lacey W
DUQUESNE LIGHT CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19340D478 List:
References
LER-80-099-03L, LER-80-99-3L, NUDOCS 8012300676
Download: ML19340D484 (2)
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LER-1980-099, /03L-0:on 801125,RCS Loop 2 Channel 1 Flow Indicator FI-RC-424 Showed Reading Above Surveillance Requirement.Caused by Isolation Amplifier Drift.Isolation Amplifier Repaired
Event date:
Report date:
3341980099R03 - NRC Website
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U. S. NUCLEAD REGULATORY COMMISSION NRC FCRM JES a nr LICENSEE EVENT REPORT CONTROL BLOCC l l

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4 60 41 OOCE ET %bv4ER 64 49 EV ENT O ATE 74 TS REPORT OATE 40 EVENT DESCRIPTION AND PA08A8LE CONSEQUENCES h lo 121 lWhile.it 43 percent reactor powce, Reactor Coolant System Loop 2 Channel 1 Flow l

(greater than 8 percent; (T77-} l Indicator FI-RC-424 did not meet the surveillance requirement g,3#,,,labove the other two channels). The channel was placed'in the tripped condition per l The health and safety of the general l 10 i s ; I Technical Specification 3.3.1.1 requirements.

jeopardized since the trip and all other functions of the loop' l

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10171 l operated satisfactorily.

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CAUSE DESCRIPTION ANd CORRECTIVE ACTIONS h All ;

j i j o l l The isolation amplifier drif ted, causing the indicated reading to drift high.

l The isolation trip and all other functions of the loop operated satisfactorily.

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g,,2, } amplifier was repaired.

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Attachment To LER 80-99/03L 8eaver Valley Power Station Duquesne Light Company Docket No. 50-334 No further information is availabic or needed to satisfy the reporting requirement.

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