05000338/LER-1979-020-03, /03L-0 on 790131:fire Door S54-9 Was Found to Be non-functional.Caused by Recently Installed Electric Door Strike Slipping Out of Adjustment

/03L-0 on 790131:fire Door S54-9 Was Found to Be non-functional.Caused by Recently Installed Electric Door Strike Slipping Out of Adjustment

ML19282A655
Person / Time
Site:	North Anna
Issue date:	02/27/1979
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19282A654	List: 05000338/LER-1979-020, Forwards LER 79-020/03L-0 05000338/LER-1979-020-03, /03L-0 on 790131:fire Door S54-9 Was Found to Be non-functional.Caused by Recently Installed Electric Door Strike Slipping Out of Adjustment
References
LER-79-020-03L, LER-79-20-3L, NUDOCS 7903050286
Download: ML19282A655 (2)

LER-1979-020, /03L-0 on 790131:fire Door S54-9 Was Found to Be non-functional.Caused by Recently Installed Electric Door Strike Slipping Out of Adjustment

Event date:
Report date:
3381979020R03 - NRC Website

text

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8 00 61 DOCKET NUMBER 68 03 LVENT D ATE 74 75 HEPORT DATE 80 EVENT DESCRIPTION AND PROB ADLE CONSEQUENCES h FiifTl [ During Mode 5 operations, fire door SS1-9,_between Unit 2 emargency svilchacar room I

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The_olectric donc striko was nut nf I Lo_lij adjustment and there_foire_could not nap 9 un with the door,atch_

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health and safety of the general public.

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i Virginia Electric and Power Company North Ar..a Power Station, Unit #1

Attachment:

Page 1 of 1 Docket No.:

50-338 Report No.:

LER 79-020/03L-0

Description of Event

On January 31, 1979, during Mode 5 operations, S54-9 was discovered not functional in accordance with Technical Specification 3.7.15.

The door was functional in that it was able to close the opening; however, the electric strike was out of adjustment and therefore the door could not make up with the door latch 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 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

The door latch had been recently replaced (see LER/R0 79-Oll/03L) and worked correctly.

Subsequent to this, the strike worked itself loose causing it to shift position.

Immediate Corrective Action

A fire watch was stationed to insure complete closure in order to maintain fire and pressure boundaries and the electric door strike was adjusted immediately.

Scheduled Corrective Action None required.

Action Take to Prevent Recurrence None required.