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

/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

ML20028C278
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-82-099-03L-01, NUDOCS 8301070290
Download: ML20028C278 (1)

LER-1982-099, /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

Event date:
Report date:
3161982099R03 - NRC Website

text

LICENSEE EVENT REPORT CONTROL BLOCK:'l l 'l l

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1o 121 I URING A SURVEILLANCE TEST ON THE AUTOMATIC LOAD SEQUENCE TIMING RELAYS, FOUR RELAY l

g,,,; TIMERS WERE FOUND TO HAVE EXCEEDED THE TOLERANCE ALLOWED BY TECHNICAL SPECIFICATION g

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T!!ESE ARE ESF TIf1ERS:

SIS PUMP 2N EXCEEDED THE MAXIMUM ALLOWABLE TIME i

,o,,,;BY 0.07 SECONDS, SIS PUMP 2S EXCEEDED THE MAXIMUM ALLOWABLE TIME BY 0.03 SECONDS, t o h> I I MDAFP 2E EXCEEDED THE MAXIMUM ALLOWABLE TIME BY 0.73 SECONDS AND THE ESW PUM g

j o il DEEDED THE ftAXIfiUM ALLCWABLE TIME BY 0.22 SECONDS.

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