05000348/LER-1980-055-03, /03L-0:on 800910,during Surveillance testing,1A Reactor Coolant Pump Bus Train B Undervoltage Relay Was Declared Inoperable Due to Incorrect Trip Value.Caused by as-left Condition Following Previous Surveillance

/03L-0:on 800910,during Surveillance testing,1A Reactor Coolant Pump Bus Train B Undervoltage Relay Was Declared Inoperable Due to Incorrect Trip Value.Caused by as-left Condition Following Previous Surveillance

ML19340B278
Person / Time
Site:	Farley
Issue date:	10/15/1980
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19340B271	List: 05000348/LER-1980-055-03, /03L-0:on 800910,during Surveillance testing,1A Reactor Coolant Pump Bus Train B Undervoltage Relay Was Declared Inoperable Due to Incorrect Trip Value.Caused by as-left Condition Following Previous Surveillance 05000348/LER-1980-056-03, /03L-0:on 800911,svc Water Bldg a Train Battery Sys Was Declared Inoperable Due to Low Battery Cell Specific Gravity.Caused by Close Terminal Post Proximity & Poor Terminal Post Seal Design Which Caused Acid Leakage ML19340B270
References
LER-80-055-03L, LER-80-55-3L, NUDOCS 8010210726
Download: ML19340B278 (1)

LER-1980-055, /03L-0:on 800910,during Surveillance testing,1A Reactor Coolant Pump Bus Train B Undervoltage Relay Was Declared Inoperable Due to Incorrect Trip Value.Caused by as-left Condition Following Previous Surveillance

Event date:
Report date:
3481980055R03 - NRC Website

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60 61 COCKET NUVSER 66 69 EVENT DATE 74 75 REPORT D ATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h IO I2l lAt 1005 on 9-10-80. while performing surveillance test FNP-1-STP-612.0 (RCP Bus Reactoti 1013l l Trip Undervoltage Relay Functional Test) the 1A RCP bus train B undervoltage relay was l l01411 declared inoperable. The as found trip value of the relay was 2622 volts vs 2640 voltq l O I s i 1 as required by Tech. Spec. 3.3.1.1.

Tech. Spec. 3.3.1.1 action statement requirements l 1016 I l were met.

Health / safety of the public were r.ut affected.

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liiOi l Based on a review of previous surveillance test data, this incident was attributed to l l lt Iil Ithe as left condition of the relay following the last surveillance test. The relay wag [i,7 g 1 adjusted and returned to service at 1025 on 9-10-80 following the successful performange [it3l lof the surveillance test.

A hold point has been placed in the procedure for verifica-l l lil4i l tion by supervision of the proper setpoint in cases where adjustments are necessary.

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