05000369/LER-1981-041, Forwards LER 81-041/03L-0.Detailed Event Analysis Encl

Forwards LER 81-041/03L-0.Detailed Event Analysis Encl

ML20009C295
Person / Time
Site:	McGuire
Issue date:	05/06/1981
From:	Parker W DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009C296	List: 05000369/LER-1981-041, Forwards LER 81-041/03L-0.Detailed Event Analysis Encl 05000369/LER-1981-041-03, /03L-0:on 810408,open Penetration Found in Health Physics Change Room Floor.Caused by Trunk Obstruction & Subsequent Personnel Error.Fire Watch Established & Work Order Written to Repair Firestop
References
NUDOCS 8107200441
Download: ML20009C295 (2)

LER-1981-041, Forwards LER 81-041/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3691981041R00 - NRC Website

text

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OPEICIAL C()Py DUKE POWER C, O31 'E T '

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WILLI AM O. PA R M E R, J R.

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May 6, 1981 373-4083

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Mr. James P. O'Reilly, Director

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U. S. Nuclear Regulatory Commission s

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JUL 171981

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Re: McGuita Nuclear Station Unit 1 N53A s

Docket No. 50-369

Dear Mr. O'Reilly:

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Please find attached Reportable Occurrence Report R0-369/81-41.

This report concerns a firestop being found open.

This incident was considered to be of no significance with respect to the health and safety of the public.

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Ve truly yours, NLi Lb. W

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William O. Parker, Jr.

RWO:pw Attachment cc: Director Mr. Bill Lavallee Office of Management & Program Analysis Nuclear Safety Analysir, Center U.S. Nuclear Regulatory Commission Post Office Box 10412 Washington, D. C.

20555 Palo Alto, CA 9t '303 Y

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8107200441 810506 DR ADOCK 05000369 PDR

McGUIRE NUCLEAR STATION INCIDENT REPORT Report Number:

81-41 Report Date: April 27, 1981 Occurrence Date: April 8, 1981 Facility: McGuire, Unit 1, Cornelius, N. C.

Identification of Occurrence: A firestop was found open.

No firewatch had been established.

Condition Prior to Occurrence: Mode 4, Hot Shutdown Description of Occurrence: A penetration was discovered open in the floor of the Health Physics change room, El. 767.

The hole had not been sealed and no firewatch had been posted.

This constituted a degraded mode of operation pursuant to Technical Specification 3.7.11.

Apparent Cause of Occurrence:

When Construction scaled all the holes, penetrations, etc., in fire barriers throughout the plant, this particular hole was overlooked.

It was obscured by a large trunk. When the trunk was moved, the hole was discovered.

Analysis of Occurrence:

If a fire had started, the lack of a firestop would have made it somewhat more difficult to control the fire.

However, it would not have interfered with the Operators' ability to maintain the plant in a safe mode.

Corrective Action

A firewatch was established upon discovery of the open penetration. A shutdown request was written to repair the firestop.

Safety Analysis

A fire in this area would not have destroyed any set of redundant equipment, cable, instrumentation, etc., necessary for safe plant shutdown.

Therefore, the health and safety of the public were not affected by this incident.