05000321/LER-1981-005-03, /03L-0:on 810113,during Steady State Operation, Drywell Temp Recorder IT47-R612 Found to Be Inoperative. Caused by Misalignment of Cam Follower Contact W/Main Programming Cam.Follower Adjusted to Maintain Contact W/Cam

/03L-0:on 810113,during Steady State Operation, Drywell Temp Recorder IT47-R612 Found to Be Inoperative. Caused by Misalignment of Cam Follower Contact W/Main Programming Cam.Follower Adjusted to Maintain Contact W/Cam

ML20003B172
Person / Time
Site:	Hatch
Issue date:	01/29/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20003B166	List: 05000321/LER-1981-005, Forwards LER 81-005/03L-0 05000321/LER-1981-005-03, /03L-0:on 810113,during Steady State Operation, Drywell Temp Recorder IT47-R612 Found to Be Inoperative. Caused by Misalignment of Cam Follower Contact W/Main Programming Cam.Follower Adjusted to Maintain Contact W/Cam
References
LER-81-005-03L, LER-81-5-3L, NUDOCS 8102100483
Download: ML20003B172 (2)

LER-1981-005, /03L-0:on 810113,during Steady State Operation, Drywell Temp Recorder IT47-R612 Found to Be Inoperative. Caused by Misalignment of Cam Follower Contact W/Main Programming Cam.Follower Adjusted to Maintain Contact W/Cam

Event date:
Report date:
3211981005R03 - NRC Website

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LICENSEE EVEN.T REPORT

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68 DOCKETNUVDER EVENT DESCHIPTION AND PROB ABLE CONSEQUENCES h S

I E LtJith 1he unit in steady state operation at 1926 Mit, IT47-R612, Drywell

. Tech Specs Table 3.2-11 j

l Temperature Recorder, was found to be inoperative.

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@l requires two operable channels.

Redundant recorder IT47-R613 was operable

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buttheminimumnumbe['o[channelswasnotmet.

Plant operation was not

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DTJ Lwas not affected.

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I CAUSE DESCRIPTION AND CONNECTIVE ACTIONS The cause of this event has been attributed to component failure. The [T]T]l failure was due to mechanical misalignmnet. The cam follower was not in I

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l contact with the main programing cam. The cam follower was re-adjusted to i, I I

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LER No.: 50-321/1981-005 Licensee: Georgia Power Company Facility: Edwin I. Hatch Docket: 53-321 E

Narrative

Report for LER 50-321/1981-005 With the unit in steady state operation at 1926 MWt, IT47-R612, Drywell Temperature Recorder, was found to be inoperative.

Technical Specifications Table 3.2-11, Item 5, requires two operable channels.

Redundant recorder

~

1T47-R613 was operable, but the minimum number of channels was not met.

Plant operation was not affected as a result of this event.

The health and safety of the public was not affected.

This is a repetitive event as last reported on Reportable Oc.currence Report No. 50-321/1980-121.

The cause of this event has been attributed to component failure.

The-failure was due to mechanical misalignment.

The cam fol. lower was not in contact with the main programing cam.

The cam followerfwas' re-adjusted to maintain contact with the cam.

The recorder now prints properly.

The unit is now in full compliance with the requirements.

A generic review revealed no inherent problems.

This particular failure mode has not been evident before. This type of Taylor recorder is not used on Hatch. Unit II.

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