05000366/LER-1980-142-03, /03L-0:on 801014,while Operating at Steady State 2,138 Mwt Power Level,Break in 3-h Fire Rated Wall Identified.Caused by Personnel Oversight in Followup of Sealing New Penetrations.Fire Watch Posted

/03L-0:on 801014,while Operating at Steady State 2,138 Mwt Power Level,Break in 3-h Fire Rated Wall Identified.Caused by Personnel Oversight in Followup of Sealing New Penetrations.Fire Watch Posted

ML19339C635
Person / Time
Site:	Hatch
Issue date:	11/07/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19339C628	List: 05000366/LER-1980-142, Forwards LER 80-142/03L-0 05000366/LER-1980-142-03, /03L-0:on 801014,while Operating at Steady State 2,138 Mwt Power Level,Break in 3-h Fire Rated Wall Identified.Caused by Personnel Oversight in Followup of Sealing New Penetrations.Fire Watch Posted
References
LER-80-142-03L, LER-80-142-3L, NUDOCS 8011180706
Download: ML19339C635 (2)

LER-1980-142, /03L-0:on 801014,while Operating at Steady State 2,138 Mwt Power Level,Break in 3-h Fire Rated Wall Identified.Caused by Personnel Oversight in Followup of Sealing New Penetrations.Fire Watch Posted

Event date:
Report date:
3661980142R03 - NRC Website

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to 61 DOCKET NUMBE R 68 (PJ EVENT DATE 74 75 REPORT DATE 80 EVENT DESCntPTION AND PROBABLE CoNSEOtJENCEs h go [2l l While operating at steady state power at 2138 MWt power level, surveillance l

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was between the east cableway and the 2D 600 volt switchgear room. The l

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[ were no effects on public health and safety due to this event. This event l

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33 34 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h liloll The cause of this event was personnel oversite in the follow-up of seal-l l3 [i j l ing the new penetrations. The penetration was drilled to provide additional I

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LER No.: 50-366/1980-142 Licensee: Georgia Power Company Facility Name: Edwin I. Hatch Docket No. 50-366 Harrative Report for LER 50-366/1980-142.

Ilhile operating at steady state power at 2138 tuft power level, surveillance personnel identified a break in a three hour fire rated wall.

The wall was between the east cableway and the 2D 600 volt switchgear room.

The break consisted of a 21" diameter hole drilled through the wall. There 3

were no effects on public health and safety due to this event.

This event is repetitive as last reported on Reportable Occurrence Report No. 50-365/

1980-119.

The cause of this event was personnel oversite in the follow-up of seal-ing the new penetrations. The penetration was drilled to provide additional conduit for plant modification.

Immediate corrective action was to post a fire watch and then seal the penetration.

Personnel were re-instructed on the necessary control.of this type work.

The generic revieu did not reveal any inherent problems.

This event was caused by personnel oversite compounded by the fact that the crew was working with both fire rated walls and.non-fire rated walls.

The difference between the tuo walls were not readily identifiable. The plant has controls and procedures for work of this nature and with additional emphasis, it should prevent a re-occurrence.

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