05000315/LER-1978-063-03, /03L-0 on 781128:aux Feed Throttle from Mdafp to 3S/G Position Indication Was Intermittent;Valve Would Not Close Electrically.Caused by Broken Lead Between Terminal 43 & 57 on Aux Switch of Limitorque SMB-0-25 Operator

/03L-0 on 781128:aux Feed Throttle from Mdafp to 3S/G Position Indication Was Intermittent;Valve Would Not Close Electrically.Caused by Broken Lead Between Terminal 43 & 57 on Aux Switch of Limitorque SMB-0-25 Operator

ML17317A821
Person / Time
Site:	Cook
Issue date:	12/20/1978
From:	Wizner D INDIANA MICHIGAN POWER CO.
To:
Shared Package
ML17317A820	List: 05000315/LER-1978-063, Forwards LER 78-063/03L-0 05000315/LER-1978-063-03, /03L-0 on 781128:aux Feed Throttle from Mdafp to 3S/G Position Indication Was Intermittent;Valve Would Not Close Electrically.Caused by Broken Lead Between Terminal 43 & 57 on Aux Switch of Limitorque SMB-0-25 Operator
References
LER-78-063-03L-01, LER-78-63-3L-1, NUDOCS 7812270226
Download: ML17317A821 (2)

LER-1978-063, /03L-0 on 781128:aux Feed Throttle from Mdafp to 3S/G Position Indication Was Intermittent;Valve Would Not Close Electrically.Caused by Broken Lead Between Terminal 43 & 57 on Aux Switch of Limitorque SMB-0-25 Operator

Event date:
Report date:
3151978063R03 - NRC Website

text

U. S. NUCLEAR REGULATORY COMMISSION NRC FORM 366

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60 61 DOCKET NUMBER 68 69 EVENT DATE EVENT DESCRIPTION AND PROBABI.E CONSEQUENCES 010 rmal o eration Aux Feed throttle from NDAFP to 80 7

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intermittent.

Valve would not close electrically.

Valve wa declared inoperable

~OS constitutin an ino erable flow ath required by T.S. 3.7.1.2 Repairs were completed within the re uired time limit.

The health and safet of the public were not jeo-

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A similiar occurence was re orted on LER 78-018 03L-0 Docket No.

050-031'.5:.

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Failure of the o erator was the result of a broken lead 'between terminal 843 and 857 on the Aux. switch of the limitor ue SMB-0-25 o erator.

The wire was re laced.

No cause for the break could be determined.

No simi la'r faults were detected in the 3

wirin and all similai;.~. valves were functionin ro erl No further action is lanned.

9 11 12 LOSS OF OR DAMAGETO FACILITYQ43 TYPE

DESCRIPTION

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10 12 13 44 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITYQ s ~ Qss [ZJQs4 7

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10 44 PERSONNEL EXPOSURES NUMBER TYPE

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11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTION 41 8 ~~Qo A

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METHOD OF DISCOVERY DISCOVERY DESCRIPTION 32

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