05000366/LER-1981-047-03, /03L-0:on 810520,drywell & Torus Temp Recorder Found Inoperable During Steady State Operation.Caused by Dirty Slidewire on Recorder Due to Dust Buildup.Slidewire Cleaned & Recorder Returned to Svc

/03L-0:on 810520,drywell & Torus Temp Recorder Found Inoperable During Steady State Operation.Caused by Dirty Slidewire on Recorder Due to Dust Buildup.Slidewire Cleaned & Recorder Returned to Svc

ML20004F110
Person / Time
Site:	Hatch
Issue date:	06/09/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20004F108	List: 05000366/LER-1981-047, Forwards LER 81-047/03L-0 05000366/LER-1981-047-03, /03L-0:on 810520,drywell & Torus Temp Recorder Found Inoperable During Steady State Operation.Caused by Dirty Slidewire on Recorder Due to Dust Buildup.Slidewire Cleaned & Recorder Returned to Svc
References
LER-81-047-03L, LER-81-47-3L, NUDOCS 8106160513
Download: ML20004F110 (2)

LER-1981-047, /03L-0:on 810520,drywell & Torus Temp Recorder Found Inoperable During Steady State Operation.Caused by Dirty Slidewire on Recorder Due to Dust Buildup.Slidewire Cleaned & Recorder Returned to Svc

Event date:
Report date:
3661981047R03 - NRC Website

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00 bl DOCA E T NUMdE ft 63 63 LVENT DATE 74 lb HEPORT DATE 80 EVENT DE0CniPTloN AND PnoDADLE CONSEQUENCES h O 2 l While the plant was in steady state operation at 2424 ft!t, 2T47-R627, Dry-l l O 131 l well and Torus Temperature Recorder, was found to be inoperative. Tech l

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Specs Section 3.3.6.4.a requires 'both channels to be operable. Redundant l

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Plant operation was placed in a 30 day l

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This is a repetitive eventas last l

10181 L reported on Reportable Occurrence Report No. 50-366/1981-063.

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CAUSE DESCntPTION AND CONNECTIVE ACTIONS

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recorder.

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LER No.: 50-366/1981-047 Licensee: Georgia Power Company Facility: Edwin I. Ilatch Docket No.: 50-366/1981-047.

Narrative

Report for LER 50-366/1981-047.

On May 20, 1981, while the plant was in steady' state operation at 2424 MWt, Drywell and Torus Temperature Recorder was found to be inoperative.

Tech Specs Section 3.3.6.4.a. requires both channels to be operable.

Redundant Drywell and Torus Temperature Recorder. was operable.

Plant operation was placed in a 30 day LC0 as a result of this event.

The health and safety of the public was not affected as a result of this event.

This is a repetitive event as last reported on Reportable Oc:urrence 50-366/1980-063.

The cause of this event has been attributed to a dirty slidewire on the recorder thus causing the recorder to stamp in the same position on all recorder points being monitored.

The recorder slidewire was cleaned with electrical contact lubricant cleaner, then exercised and checked for correct operation and returned to service.

These type recorders are generic to Unit I and Unit II and an investigation reveals that this is the first incident of a dirty slidewire and no inherent problems exist.

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