05000321/LER-1980-110-03, /03L-0:on 800919,HPCI Min Flow valve,1E41-F012 Failed to Close on Signal.Caused by Mechanical Interlock on Opening Contractor Binding Which Would Not Allow Closing Contractor to Pickup.Contractor Repaired & Returned to Svc

/03L-0:on 800919,HPCI Min Flow valve,1E41-F012 Failed to Close on Signal.Caused by Mechanical Interlock on Opening Contractor Binding Which Would Not Allow Closing Contractor to Pickup.Contractor Repaired & Returned to Svc

ML19347C033
Person / Time
Site:	Hatch
Issue date:	10/09/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19347C031	List: 05000321/LER-1980-110, Forwards LER 80-110/03L-0 05000321/LER-1980-110-03, /03L-0:on 800919,HPCI Min Flow valve,1E41-F012 Failed to Close on Signal.Caused by Mechanical Interlock on Opening Contractor Binding Which Would Not Allow Closing Contractor to Pickup.Contractor Repaired & Returned to Svc
References
LER-80-110-03L-01, LER-80-110-3L-1, NUDOCS 8010160482
Download: ML19347C033 (2)

LER-1980-110, /03L-0:on 800919,HPCI Min Flow valve,1E41-F012 Failed to Close on Signal.Caused by Mechanical Interlock on Opening Contractor Binding Which Would Not Allow Closing Contractor to Pickup.Contractor Repaired & Returned to Svc

Event date:
Report date:
3211980110R03 - NRC Website

text

MRC FORM 366 U. S. NUCLt AH HLGUL AIUHY CUMMibblON 777)

LICENSEE EVENT REPORT CONT ROL BLOC <; l l

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Os 61 COCKETf JMBER 68 63 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES O1o [o l2l l During normal reactor operation, while performing HNP-1-3302, HPCI VALVE l

l o 13 l l operability test, HPCI minium Flow valve, 1E41-F012 was opened but failed l

[o l4 l lwhen given a signal to close, HPCI was then declared inoperable pe. Tech l

lS ec. 3/4.5.1.

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50-321/1980-110 Licensee: GEORGIA POWER COMPANY Facility Name: EDWIN I. HATCH Docket #: 50-321

Narrative

Report for LER 50-321/1980-110 During normal reactor operation, while performing HNP-1-3302, HPCI valve operability, HPCI minimum flow valve, 1E41-F012, was opened q

but failed when given a signal to close. HPC1 was then declared inoperable per Tech. Spec. 3/4.5.1.

There were no effects to public health and safety as a result of this incident. This was not a repetitive occurrence.

The valve failing to close was due to a mechanical interlock on the opening contactor, used to control valve motor, binding which would not allow the close contactor to pick-up.

The contactor was repaired and teste).

HNP-1-3302 was then performed with satisfactory results.

Motor control starters of the same type are used on both Plant Hatch Unit I and Unit II.

However a generic review revealed no inherent problems.

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