05000254/LER-1980-004-03, /03L-0:on 800215,while Performing Reactor low-low Water Level Calibr Test,Procedure QIS-11,level Switch LIS-1-263-72A Failed.Caused by Slight Misalignment of Mercury Wetted Magnetic Switch W/Actuating Magnet

/03L-0:on 800215,while Performing Reactor low-low Water Level Calibr Test,Procedure QIS-11,level Switch LIS-1-263-72A Failed.Caused by Slight Misalignment of Mercury Wetted Magnetic Switch W/Actuating Magnet

ML19290E968
Person / Time
Site:	Quad Cities
Issue date:	02/26/1980
From:	Hafera T COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19290E965	List: 05000254/LER-1980-004, Forwards LER 80-004/03L-0 05000254/LER-1980-004-03, /03L-0:on 800215,while Performing Reactor low-low Water Level Calibr Test,Procedure QIS-11,level Switch LIS-1-263-72A Failed.Caused by Slight Misalignment of Mercury Wetted Magnetic Switch W/Actuating Magnet
References
LER-80-004-03L-03, LER-80-4-3L-3, NUDOCS 8003170397
Download: ML19290E968 (1)

LER-1980-004, /03L-0:on 800215,while Performing Reactor low-low Water Level Calibr Test,Procedure QIS-11,level Switch LIS-1-263-72A Failed.Caused by Slight Misalignment of Mercury Wetted Magnetic Switch W/Actuating Magnet

Event date:
Report date:
2541980004R03 - NRC Website

text

U. S. NUCLEAR REGULATORY COMMISSloN NRC FORM 366 tr. m i (CENSEE EVENT REPORT 7

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60 61 DOCK ET NUMB ER 68 69 EVENT OATE 14 75 REPORT DATE 80 EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES h While performing routine Reactor Low-Low Water Level Calibration test, procedure l

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QlS-II, level switch LIS-1-263-72A failed to operate properly (T.S. 3.2).

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three switches were found to be fully operable and would have given the proper ECCS o

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