ML20050B017

LER 82-002/03L-0:on 820210,reactor Protection Sys Channel B Hot Leg Temp Readings Were Lower than Those of Channels A,C & D.Caused by Failure of Liner Bridge in Input Circuitry for Channel B Indication.Bridge Replaced

ML20050B017
Person / Time
Site:	Oconee
Issue date:	03/12/1982
From:	Kutzer J DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20050B011	List: ML20050B010 ML20050B017
References
LER-82-002-03L, LER-82-2-3L, NUDOCS 8204020502
Download: ML20050B017 (1)

Text

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REPCAT OAT S so EVENT DESCHirnON ANO PROSASLE CCt4SECUENCES h o 2 l On February 10, 1982, the RPS Channel 'B' Hot Leg Temperature indication was ,

declared inoperable due to readings that were lower than Channels 'A', 'C', and

, , ; 'D'. Channel 'B' was placed in TRIP / BYPASS condition, and Channels 'A', 'C',

g iand 'D' were operational during the incident; thus, the health and safety of ,

,the public were not affected by this incident. ,

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CAuse oEScRirTicN AnoCoRREenvE AcnoNs i o l The apparent cause of this incident was the failure of a Linear Bridge in the t

, input circuitry for the Channel 'B' indication. Channel 'B' of the Hot Leg

, , g g ,. Temperature indication was placed in TRIP / BYPASS condition. The Linear Bridge ;

, 3 lwas replaced and the Channel 'B' indication was calibrated and returned to l

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J. F. Kutzer YO4"373-7139 NAME C8 PREPAREft PMCN E:

8204020502 820312 PDR ADOCK 05000287 S PDR

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