05000316/LER-1981-037-03, /03L-0:on 810728 & 29,containment Pressure hi-hi Bistable Found to Trip Outside Tech Spec Requirements.Caused by Instrument Drift.Bistable Recalibr.During Retest,Bistable Actuation Point Found Excessive.Bistable Replaced

/03L-0:on 810728 & 29,containment Pressure hi-hi Bistable Found to Trip Outside Tech Spec Requirements.Caused by Instrument Drift.Bistable Recalibr.During Retest,Bistable Actuation Point Found Excessive.Bistable Replaced

ML20010E257
Person / Time
Site:	Cook
Issue date:	08/25/1981
From:	Rischling J INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20010E254	List: 05000316/LER-1981-034, Updated LER 81-034/04X-0:between 810617 & 810715,detector on RMS Channel R-19 Failed & Steam Generator Blowdown Flash Tank Experienced Small primary-to-secondary Leak.Caused by Failure of Meter,Model 654.Procedures Revised 05000316/LER-1981-037, Forwards LER 81-037/03L-0 & Updated LER 81-034/04X-1 05000316/LER-1981-037-03, /03L-0:on 810728 & 29,containment Pressure hi-hi Bistable Found to Trip Outside Tech Spec Requirements.Caused by Instrument Drift.Bistable Recalibr.During Retest,Bistable Actuation Point Found Excessive.Bistable Replaced
References
LER-81-037-03L, LER-81-37-3L, NUDOCS 8109030245
Download: ML20010E257 (2)

LER-1981-037, /03L-0:on 810728 & 29,containment Pressure hi-hi Bistable Found to Trip Outside Tech Spec Requirements.Caused by Instrument Drift.Bistable Recalibr.During Retest,Bistable Actuation Point Found Excessive.Bistable Replaced

Event date:
Report date:
3161981037R03 - NRC Website

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s EVENT DESCRIPTION AND PROB AB C NS ' ENCES to; ;j DURING NORilAL OPERATION, WHILE PERFORMING A SURVEILLANCE TEST, A CONTAINMENT PRESSURE 1 HIGH-HIGH BISTABLE WAS FOUND TO TRIP AT A VALUE EQUIVALENT TO 3.1 PSIG ON TWO OCCAS-l g,,,

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