05000338/LER-1979-011-03, /03L-0 on 790126:fire Door SS54-9 Was Nonfunctional.Caused by Removal of Latch from Door by Person or Persons Unknown

/03L-0 on 790126:fire Door SS54-9 Was Nonfunctional.Caused by Removal of Latch from Door by Person or Persons Unknown

ML19269D160
Person / Time
Site:	North Anna
Issue date:	02/22/1979
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19269D158	List: 05000338/LER-1979-011, Forwards LER 79-011/03L-0 05000338/LER-1979-011-03, /03L-0 on 790126:fire Door SS54-9 Was Nonfunctional.Caused by Removal of Latch from Door by Person or Persons Unknown
References
LER-79-011-03L, LER-79-11-3L, NUDOCS 7902270403
Download: ML19269D160 (2)

LER-1979-011, /03L-0 on 790126:fire Door SS54-9 Was Nonfunctional.Caused by Removal of Latch from Door by Person or Persons Unknown

Event date:
Report date:
3381979011R03 - NRC Website

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• EVENT DESCRIPTION AND PROBADLE CONSEQUENCES to Elf] IS.uring nonyl operations, fire door 04-9, between Unit 2 emergency switchgear room j

and cable vault was hund to be non functional. The door latch was missing and there i g

fore could not make up with the strike plate.

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control room fire boundary and positive pressure envelope.

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NA*dE OF PREPARER

Virginia Electric and Powcr Company North Anna Power Station, Unit #1

Attachment:

Page 1 of 1 Docket No.: 50-338 Report No.: LER 79-011/03L-0

Description of Event

On January 26, 1979, during normal operations, S54-9 was discovered not functional in accordance with Technical Specification 3.7.7.1 and 3.7.15.

The door was functional in that it was able to close the opening; however, the door latch was missing and therefore the door could not make up with the strike plate establishing a tight seal.

This door is in the Unit No. 2 Emergency Switchgear and Relay Room.

It shares, however, a common habitability with the Unit No.1 Switchgear and Relay Room.

Probable Consequences of Occurrence The Control Room habitability systems required by T.S. 3.7.7.1 and the penetration fire barriers required by T.S. 3.7.15 are provided to assure continuous occupancy of the area during and after natural phenomena, fire and missiles as well as for all postulated accidents which may or may not release radioactivity to the environs.

In this case, door S54-9 is used both as a pressure envelope boundary and a penetration fire barrier.

The health and safety of operating personnel and the general public were not endangered.

Cause

During construction, the door latch was removed by person or persons unknown.

Immediate Corrective Action

A do, watch was stationed to insure complete closure in order to maintain i4ce and pressure boundaries.

A replacement latch was found and immediately installed.

Scheduled Corrective Action None Required Actions Taken to Prevent Recurrence None Required