ML19338C942

LER 80-016/03L-0:on 800723,discovered That Pressure Switch PS-2-261-30C Would Trip at 841 Psig,Under Limit of 850 Psig. Caused by Instrument Drift.Pressure Switch Recalibr & Tested Satisfactorily

ML19338C942
Person / Time
Site:	Quad Cities
Issue date:	08/11/1980
From:	Kan S COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19338C934	List: ML19338C933 ML19338C942
References
LER-80-016-03L-04, LER-80-16-3L-4, NUDOCS 8009080407
Download: ML19338C942 (1)

Text

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pRC FOSM 386 U. S. NUCLEAR REGULATORY COMMISSION

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• LICENSEE EVENT REPORT

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lh (PLEASE PRINT OR TYPE ALL REOUIRED INF-ORMATION)

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OATE 7 3 60 St OOCKET NUM9ER 68 69 EVENT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES O'o gl While performing Main Steam Line Low Pressure Isolation Surveillance, QlS-20, .  ;

Al pressure switch PS-2-261-30C was found to trip at 841 psig. The Technical l 1014 l l Speci fication 2.1.H. limit is not to be less than 850 psig. Redundant pressure l lOis] l switches did function properly therefore, a Main Steam Line isolation would  ;

gl have occurred had the need arisen. l

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42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l i 101 l The cause is attributed to instrument dri f t. The switch was recalibrated and I mI tested satisfactorily. I li12i I l li t al l l 18 14 1 I l 7 8 9 80 STA S  % POWER OTHER STATUS IS Y OISCOVERY DESCRIPTION Surveillance Test li 15' l l El@ l 0 l 8 l 7' l@l" NA l W @l

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