05000315/LER-1981-015-03, /03L-0:on 810603,five Relay Timers Were Found Out of Spec.Caused by Instrument Drift.Ccw 1W Timer Replaced. Other Timers Readjusted

/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: 05000315/LER-1981-014-03, /03L-0:on 810606,during Surveillance insp,non- Penetrating Cracks Were Found in Divider Barrier Seal.Cause Unknown.Defective Portions of Seal Replaced 05000315/LER-1981-015-03, /03L-0:on 810603,five Relay Timers Were Found Out of Spec.Caused by Instrument Drift.Ccw 1W Timer Replaced. Other Timers Readjusted ML20009A876
References
LER-81-015-03L-01, LER-81-15-3L-1, NUDOCS 8107140409
Download: ML20009A885 (2)

LER-1981-015, /03L-0:on 810603,five Relay Timers Were Found Out of Spec.Caused by Instrument Drift.Ccw 1W Timer Replaced. Other Timers Readjusted

Event date:
Report date:
3151981015R03 - NRC Website

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(7-77) 5l LICENSEE EVENT REPORT 2,

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8 60 61 coCKET NUM8ER 68 63 EVENT oATE 74 75 9EP'1PT oATE 80 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

l o 14 i I 4.8.1].2.b.6.

THESE ARE ESF TIMERS:

CTS PUMP lW EXCEEDED THE MAXIMUM ALLOWABLE TIME l

,,,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-l gi

,,,,, l IMUMALLOWABLETIMEBY0.92 SECONDS,ANDESWPUMP1EEXCEEDEDTHEMAXIMUMALLOWABLETIMEj i o is i i BY 0.01 SECONDS.

PREVIOUS OCCURRENCES INCLUDE:

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33 34 35 36 37 40 41 42 43 44 47 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 l DRIFT. THE CCW 1W RELAY TIMER WAS REPLACED DUE TO EXCESSIVE DRIFT AND LACK OF REPEAT-l i,

!',,,,,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 oTwER sTAn,. @

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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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