ML20009A885

LER 81-015/03L-0:on 810603,five Relay Timers Were Found Out of Spec.Caused by Instrument Drift.Ccw 1W Timer Replaced. Other Timers Readjusted

ML20009A885
Person / Time
Site:	Cook
Issue date:	07/01/1981
From:	Palmer R INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20009A877	List: ML20009A876 ML20009A879 ML20009A885
References
LER-81-015-03L-01, LER-81-15-3L-1, NUDOCS 8107140409
Download: ML20009A885 (2)

Text

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LICENSEE EVENT REPORT 2,

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EVENT DESCRIPTION AND PROSABLE CONSEQUENCES Oio io Ia i l DURING A SURVEILLANCE TEST ON THE AUTOMATIC LOAD SEQUENCE TIMING RELAYS, FIVE RELAY I y l TIMERS WERE FOUND TO HAVE EXCEEDED THE TOLERANCE ALLOWED BY TECHNICAL SPECIFICATION l THESE ARE ESF TIMERS: CTS PUMP lW EXCEEDED THE MAXIMUM ALLOWABLE TIME l l o 14 i I 4.8.1].2.b.6.

,,,3, i BY 0.38 SECONDS, CCW PUMP 1W EXCEEDED THE MAXIMUM ALLOWABLE TIME BY 2 SECONDS, ESW PUMP l lW 2XCEEDED THE MAXIMUM ALLOWABLE TIME BY 0.05 SECONDS, CTS PUMP 1E EXCEEDED THE MAX-gi l

,,,,, l IMUMALLOWABLETIMEBY0.92 SECONDS,ANDESWPUMP1EEXCEEDEDTHEMAXIMUMALLOWABLETIMEj i o is i i BY 0.01 SECONDS. PREVIOUS OCCURRENCES INCLUDE: 50-316/81-06, (SEE ATTACHED SUPPLEMENT)I

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j~ 33 34 35 36 40 43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l t i o I l THE CUT OF SPECIFICATION VALUES OF THESE FIVE RELAY TIMERS IS ATTRIBUTED TO INSTRUMENT I i , l DRIFT. THE CCW 1W RELAY TIMER WAS REPLACED DUE TO EXCESSIVE DRIFT AND LACK OF REPEAT- l

',,,,,y ABILITY. THE CTS PUMP lW, ESW PUMP lW, CTS PUMP lE AND ESW PUMP lE RELAY TIMERS WERE l g ; READJUSTED TO WITHIN ALLOWABLE LIMITS. THESE TIMERS ARE MANUFACTURED BY AGASTAT, MODEL l l # 7012. AN ENGINEERING REVIEW IS EN PROGRESS TO EVALUATE (SEE ATTACHED : SUPP TAN;Y spowER oTwER sTAn,. @ 5'Eo 18v' oiscovERv oEsCRieTioN @

NA l l l t I s I l H l@ l 0 l 0 l 0l@l" lBl@lSURVEILLANCETEST

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• cSTiviTY Co'ATENT RELEASE AMOUNT OF ACTIVITY LoCATloN oF RELEASE NA l' i I *s 'l l Z l @D ' OF RELEASEW@l" NA l l l

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I ATTACHMENT TO LER #81-015/03L-0 i

SUPPLEMENT TO EVENT DESCRIPTION 80-28, 79-54, 21 AND 50-315/80-16, 79-30.

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SUPPLEMENT TO CAUSE DESCRIPTION i THE TECHNICAL SPECIFICATION TOLERANCES AND THE TYPE OF RELAY TIMERS USED.

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