05000366/LER-1981-077-03, /03L-0:on 810818,during Steady State Operation, Drywell Pressure & Torus Water Level Recorder 2T48-R607A Found Inoperative.Caused by Component Failure Due to Dirty Electrical Connection on Mother Board

/03L-0:on 810818,during Steady State Operation, Drywell Pressure & Torus Water Level Recorder 2T48-R607A Found Inoperative.Caused by Component Failure Due to Dirty Electrical Connection on Mother Board

ML20010G005
Person / Time
Site:	Hatch
Issue date:	09/03/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010F994	List: 05000366/LER-1981-077, Forwards LER 81-077/03L-0 05000366/LER-1981-077-03, /03L-0:on 810818,during Steady State Operation, Drywell Pressure & Torus Water Level Recorder 2T48-R607A Found Inoperative.Caused by Component Failure Due to Dirty Electrical Connection on Mother Board
References
LER-81-077-03L-01, LER-81-77-3L-1, NUDOCS 8109150219
Download: ML20010G005 (2)

LER-1981-077, /03L-0:on 810818,during Steady State Operation, Drywell Pressure & Torus Water Level Recorder 2T48-R607A Found Inoperative.Caused by Component Failure Due to Dirty Electrical Connection on Mother Board

Event date:
Report date:
3661981077R03 - NRC Website

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NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION

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8 60 61 DOCA ET NUVB:R 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT OESCRIPTION AND PROB ABLE CONSEQUENCES h l 10121 l While the plant was in steady state coeration at 2121 MWt Dryweli Pres-1 i

1 lU i3 i i sure and Torus Water Level Recorder, 2T48-R607A, was found to be inoper-l 1

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CAUSE DESCRIPTION AND CORRECTIVE AL IONS h U_LO_J l The cause of the event has been attributed to comoonent failure.

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LER No.:

50-366/1981-077 Licensee: Georgia Power Company Facility:

Edwin I. Hatch Docket No.:

50-366

Narrative

Repor-t for LER 50-366/1981-077 Uhile the plant was in steady state operation at 2121 MWt, Drywell Pres-sure and Torus Water Level Recorder, 2T"9-R607A, was found to be inoperative.

Tech Specs Section 3.6.2.1.F requires buch sub-systems to be operable.

Redundant recorder 2T48-R607B was operable. Plant operation was placed in a 30 day LC0 as a result of th's event.

The health and safety of the public was not affected. This is a repetitive event as last reported on Reportable Occurrence Report No. 50-366/1979-131.

The ccuse of the event has been attributed to component fail 9re.

The failure was due to a dirty electrical connection on the mother board.

Also the recorder mother board was not fully inserted to make proper cor.nection with the pen amplifier.

The component was cleaned and properly reinstalled. The unit is now in full compliance.

A generic review revealed no inherent problems.

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