ML20040D439

LER 81-063/03L-0:on 811229,loop 3 T-average Indication Failed High & Delta-T Indication Failed Low.Caused by Failure of Resistance Temp Detector for Loop 3.Detector Replaced W/Spare

ML20040D439
Person / Time
Site:	Cook
Issue date:	01/21/1982
From:	Palmer R INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20040D435	List: ML20040D434 ML20040D439
References
LER-81-063-03L-01, LER-81-63-3L-1, NUDOCS 8202010297
Download: ML20040D439 (1)

Text

. . LICENSEE EVENT REPORT

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EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h

. 10 l 21 l DURING NORMAL OPERATION, LOOP 3 T-AVERAGE INDICATION FAILED HIGH AND DELTA-T INDICA- l 10131I TION FAILED LOW. THIS EVENT DID NOT MEET THE OPERABILITY REQUIREMENTS OF TECHNICAL l lo i. l l SPECIFICATION TABLE 3.3-1 ITEMS 7 AND 8, AND TABLE 3.3-3 ITEMS 1.F AND 4.D. THE l lo IsI l APPROPRIATE BISTABLES WERE PLACED IN THE TRIP POSITION AS REQUIRED BY THE APPLICABLE l 1 O is i l ACTION REQUIREMENT. PREVIOUS OCCURRENCES INCLUDE: 050-315/80-002,81-007 AND l l 0 l 7 l l 050-316/81-036. I 10181I l

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33 34 35 3/ 40 43 44 47 CAUSE DESCRIPTION AND CORAECTIVE ACTIONS h li l o l l TROUBLESHOOTING REVEALED THAT THE RTD FOR LOOP 3 HAD FAILED. THE SPARE RTD WAS I i

i i iCONNECTED IN PLACE OF THE BAD RTD. AFTER THE INSTRUMENTATION LOOP WAS CALIBRATED FOR I i1 i,i lTHE NEW RTD, THE APPLICABLE SURVEILLANCE TEST WAS PERFORMED TO VERIFY TRIP SETPOINTS I i1 1,i l AND THE SYSTEM WAS RETURNED TO SERVICE. THE RTD THAT FAILED WAS MANUFACTURED BY I g l ROSEMOUNT MODEL 176 KF. l

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