05000316/LER-1982-100-03, /03L-0:on 821130,during Surveillance Test on Diesel Generator Load Shedding Relays,Six 4 Kv Loss of Voltage Relays Exceeded Allowed Tolerance.Caused by Instrument Drift.Undervoltage Relay Under Study

/03L-0:on 821130,during Surveillance Test on Diesel Generator Load Shedding Relays,Six 4 Kv Loss of Voltage Relays Exceeded Allowed Tolerance.Caused by Instrument Drift.Undervoltage Relay Under Study

ML20028C282
Person / Time
Site:	Cook
Issue date:	12/22/1982
From:	Palmer R INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20028C263	List: 05000316/LER-1982-097-03, /03L-0:on 821204,fire Detection Sys Alarm for 4 Kv Switchgear Room Received Due to Pyralarm Detector Alarming for No Apparent Reason.Caused by Low Setpoint.New Detector Installed 05000316/LER-1982-098-03, /03L-0:on 821127,fire Detection Sys Alarm for 4 Kv Switchgear Room Received Due to Pyralarm Detector Alarming. Caused by Low Alarm Setpoint.Pyralarm Replaced 05000316/LER-1982-099-03, /03L-0:on 821123,during Surveillance Test on Automatic Load Sequence Timing Relays,Four ESF Timers Found to Exceed Allowed Tolerance.Caused by Instrument Drift. Timers Readjusted & Solid State Relays Under Review 05000316/LER-1982-100-03, /03L-0:on 821130,during Surveillance Test on Diesel Generator Load Shedding Relays,Six 4 Kv Loss of Voltage Relays Exceeded Allowed Tolerance.Caused by Instrument Drift.Undervoltage Relay Under Study 05000316/LER-1982-101-03, /03L-0:on 821124,discovered Time Delay of Two Automatic Load Sequence Relay Timers Not Repeatable & Timers Exceeded Allowed Tolerance.Caused by Toggle Switch Assemblies Being Out of Alignment.Assemblies Replaced ML20028C262
References
LER-82-100-03L-01, LER-82-100-3L-1, NUDOCS 8301070293
Download: ML20028C282 (1)

LER-1982-100, /03L-0:on 821130,during Surveillance Test on Diesel Generator Load Shedding Relays,Six 4 Kv Loss of Voltage Relays Exceeded Allowed Tolerance.Caused by Instrument Drift.Undervoltage Relay Under Study

Event date:
Report date:
3161982100R03 - NRC Website

text

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4 60 61 COCKET NUMBE R 68 6W EVENT DATE 74 7b REPORT DATE 80 EVENT DESCRIPTION AND PROBADLE CONSEQUENCES Oio l 0,2 ; l DURING A SURVEILLANCE TEST ON THE DfESEL GENERATOR LOAD SHEDDING RELAYS, SIX 4-KV l

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