05000321/LER-1980-128-03, /03L-0:on 801230,while Performing High Drywell Pressure Function Test,Relay ANP-1-3002 Failed.Caused by Broken Insulation Preventing Contacts from de-energizing. Replay Replaced & Returned to Svc

/03L-0:on 801230,while Performing High Drywell Pressure Function Test,Relay ANP-1-3002 Failed.Caused by Broken Insulation Preventing Contacts from de-energizing. Replay Replaced & Returned to Svc

ML20003A408
Person / Time
Site:	Hatch
Issue date:	01/27/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20003A404	List: 05000321/LER-1980-128, Forwards LER 80-128/03L-0 05000321/LER-1980-128-03, /03L-0:on 801230,while Performing High Drywell Pressure Function Test,Relay ANP-1-3002 Failed.Caused by Broken Insulation Preventing Contacts from de-energizing. Replay Replaced & Returned to Svc ML20003A408
References
LER-80-128-03L-01, LER-80-128-3L-1, NUDOCS 8102030634
Download: ML20003A408 (2)

LER-1980-128, /03L-0:on 801230,while Performing High Drywell Pressure Function Test,Relay ANP-1-3002 Failed.Caused by Broken Insulation Preventing Contacts from de-energizing. Replay Replaced & Returned to Svc

Event date:
Report date:
3211980128R03 - NRC Website

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6J EVENT DATE 14 75 REPOHT DATE 80 EVENT DESCHIPTION AND PROB ABLE CONSEQUENCES h O 2 l On December 30, 1980, while at 637 MWe and nerforming High Drywell Pressure I

[o l31 l Function Test, HilP-1-3002, per Tech Specs 3.1-1 b and c, one of the dry-l

[ o 14 l l well high pressure relays, IC71-K43, did not function properly.

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relay failed again on January 1,1981.

Prior to these failures, this l

[o lc l l was a non-repetitive event.

Safe plant operation was not affected nor l

[o l 7 l l was there any effect on the health and safety of the public due to this l

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[ijil l the relay contacts from de-energizing.

It was repaired and functionally 1

i,i7i l tested with satisfactory results.

The second failure was due to a coil l

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The relay was replaced and returned to service.

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LER No.: 50-321/1980-128 O

Licensee: Georgia Power Company Facility: Edwin I. Hatch Docket No. : 50-321

Narrative

P.eport for LEP. 50-321/1980-128 On December 30, 1980, while at 637 !!.le and performing High Drywell Pressure Functional Test per NNP-1-3002 and Tech Spec 3.1-1 b and c, one of the dry-well high pressure relays, IC71-K48, did not function properly.

Prior to these failures, this was a non-repetitive event.

Safe plant operation was not affected nor was there any effect on the public health and safety due to this event.

The first event was caused by broken insulation on the relay, preventing the relay contacts from de-energizing.

It was repaired and functionally tested with satisfactory results. The second failure was due to coil failure. The relay was replaced and returned to service.

These relays are generic to Unit I and Unit II and investigations revealed no inherent repetitive failures.

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