05000338/LER-1979-013-03, /03L-0 on 790214:during Normal Operation,Fire Door S71-7 Between Auxiliary Bldg & Health Physics Found non- Functional.Caused by Bent Phaser on Left Door.Phaser Taped Out of Way & New Phaser Installed

/03L-0 on 790214:during Normal Operation,Fire Door S71-7 Between Auxiliary Bldg & Health Physics Found non- Functional.Caused by Bent Phaser on Left Door.Phaser Taped Out of Way & New Phaser Installed

ML19289D790
Person / Time
Site:	North Anna
Issue date:	03/09/1979
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19289D784	List: 05000338/LER-1979-013-03, /03L-0 on 790214:during Normal Operation,Fire Door S71-7 Between Auxiliary Bldg & Health Physics Found non- Functional.Caused by Bent Phaser on Left Door.Phaser Taped Out of Way & New Phaser Installed 05000338/LER-1979-018-03, /03L-0 on 790214:during Mode 1 Operation at 98% Power,Main Steam Trip Valve 1-TV-MS-111B Leaked Excessively & Was Isolated for Repair.Caused by Deteriorated Internal Gasket.Valve Isolated & Gasket Replaced 05000338/LER-1979-019-03, /03L-0 on 790216:during Surveillance,Emergency Diesel Generator 1H Did Not Reach 900 Revolutions Per Minute in Required 10-s.Probable Cause Was Low Ambient Air Temp. Conditions of First Start Were Not Reproducible ML19289D783
References
LER-79-013-03L, LER-79-13-3L, NUDOCS 7903140414
Download: ML19289D790 (2)

LER-1979-013, /03L-0 on 790214:during Normal Operation,Fire Door S71-7 Between Auxiliary Bldg & Health Physics Found non- Functional.Caused by Bent Phaser on Left Door.Phaser Taped Out of Way & New Phaser Installed

Event date:
Report date:
3381979013R03 - NRC Website

text

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60 61 DOCKET NUMBER t,8 63 EVENT DATE 74 75 REPORT DATE SJ EVENT DESCRIPTION AND PROO ABLE CONSEQUENCES O'o lDuring normal power operations, fire door S71-7, between the Auxiliary Building and o

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

Attachment:

Page 1 of 1 Docket No.:

50-338 Report No.: LER/R0 79-013/03L-0

Description Of Event

On February 14. 1979, during normal power operations, twin fire door S71-7, was discovered not functional in accordance with Teconical Specifica-tion 3.7.15.

The door was functional in that it was able to close the opening between the Health Physics corridor and the Auxiliary Building on the 274 foot elevation.

The phaser on the left door, which assures correct overlapping closure between the two twin doors was bent causing the left door to stay open.

Probable Consequences of Event The penetration fire barriers required by T.S. 3/4.7.15 are provided to ensure that fires will be confined or adequately retarded from spreading to adjacent portions of the facility.

In this event, the consequences were very limited.

The damaged phaser was replaced within one hour, thereby meeting the T.S. 3.7.15 action statement. This event did not jeopardize the health and safety of the general public.

Cause

The phaser had been caught by the door causing it to be bent downward.

This then caused the door to be caught and held open.

Immediate Corrective Action

The damaged phaser was taped up and out of the way so the door could close correctly. A new phaser was obtained and installed in place of the damaged one within one hour.

Scheduled Corrective Action None required.

Action Taken To Prevent Recurrence None required.