ML19290E968

LER 80-004/03L-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

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: ML19290E964 ML19290E968
References
LER-80-004-03L-03, LER-80-4-3L-3, NUDOCS 8003170397
Download: ML19290E968 (1)

Text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSloN tr. m '

7

- - i (CENSEE EVENT REPORT (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATroN)

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EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES h o 2 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). The other l o 4 three switches were found to be fully operable and would have given the proper ECCS o s I initiation signal had a low-low reactor water level occurred. The automatic l o s i initiation capability of ECCS was always operable. I I

o 7 l O d l eo CAUSE COMP, VA LV E SYSTE M CAUSE CODE CODE SU8CCCE COMPONENT CODE SUSCCDE SUBCODE oloi i s i r l@ LsJ@ Ld @ l i i n i S IT l R lU lh l S lh [ Z,j h 18 is 20 7 8 9 10 11 12 13 SE QU ENTI AL. OCCURRENCE REPORT REVISION EVENT YEAR RE PORT NO. CODE TvFE N O.

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33 36 CAUSE DESCRIPTION ANO CCRRECTIVE ACTIONS i O l The cause of this occurrence was due to a slicht misaliennent of thn w cnev wetted I g i 13 ) l magnetic switch in relation to its actuating magnet. The switch and actuatint magnet I I

i 7 I were realigned and tested satisfactorily.

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Lt.l.d J l 80 7 8 9 STA S  % PCWER OTHER STATUS DIS V RY DISCOVERY DESCRIPTION i 5 l E l@ l 0l 9 l 4 lhl NA l lBl@l Routine Test l AC TIVITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTtVITY LOCATION OF RELEASE 7

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PERSONNEL EXPOSURES NUY8ER TYPE DESCRIPTION 1 7 l0l0l0lhlZlhl NA l PERSONNE L INJURt ES NuusER cESCRiPT.ONh 7

1 H 8 9 l0l0l0l@l 11 12 NA 80 l

LOSS OF OR OAMAGE TO FACILITY TYPE CESCRIPTION 7

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PUB LICI TY NRC UsE ONLY

• ISSUED DESCRIPTION ,

y lNlhl NA l 68 69 lIlllll1IIllII 80 5 i 8 3 10 NAVE OF PREPARER T. Hafera PHONE: 300-654-2241. ext 176 $