05000338/LER-1979-144-03, /03L-0:on 791018,containment Integrity Violated When Caps Removed from Containment Penetration During Refueling Operations.Caused by Personnel Failure to Recognize Breach of Integrity.Plug Installed

/03L-0:on 791018,containment Integrity Violated When Caps Removed from Containment Penetration During Refueling Operations.Caused by Personnel Failure to Recognize Breach of Integrity.Plug Installed

ML19210D081
Person / Time
Site:	North Anna
Issue date:	11/16/1979
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19210D073	List: 05000338/LER-1979-144, Forwards LER 79-144/03L-0 05000338/LER-1979-144-03, /03L-0:on 791018,containment Integrity Violated When Caps Removed from Containment Penetration During Refueling Operations.Caused by Personnel Failure to Recognize Breach of Integrity.Plug Installed
References
LER-79-144-03L, LER-79-144-3L, NUDOCS 7911200499
Download: ML19210D081 (2)

LER-1979-144, /03L-0:on 791018,containment Integrity Violated When Caps Removed from Containment Penetration During Refueling Operations.Caused by Personnel Failure to Recognize Breach of Integrity.Plug Installed

Event date:
Report date:
3381979144R03 - NRC Website

text

NGC FoRP.i 366 U. S. NUCLEAR REGULATORY COMMISSION (7-77)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

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EVENT DATE 74 75 REPOHT DATE EO EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lOn October 18, 19 79, containment integrity was violated when the caps were removed o

2 10 l 3 l jfrom a containment penetration during refueling operations.

Since all operations

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pere immediately suspended, the health and safety of the general public were not I

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Pffected. This event is reportable pursuant to T.S. 6.9.1.9.d.

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40 41 42 43 44 47 CAUSE DESCRIPTION AND CORHECTIVE ACTIONS lil0l Both the inside and outside penetration pipe caps were removed for a containment fire protection tie-in to the penetration.

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Refueling operations were halted j

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

Attachment:

Page 1 of 1 Docket No. 50-333 Report No. I,ER 79-144/03L-0

Description of Event

On October 18, 1979, during refueling operations, containment integrity was violated when the inside and outside pipe capa were removed from'a containment penetration.

This event is contrary to T.S. 3.9.4 and reportable pursuant t o T. S. 6.9.1.9.d.

Probable Consequences of Occurrence The consequences of this event were tainimal because all operations liriolving core niterations or movement of irradiated fuel in the containment building were immediately suspended.

As a result, the health and safety of the general public were not affected.

There are no generic implications associated with this event.

Cause of Occurrence The design change which breached the containment penetration had been properly authorized.

Following this, core alterations began and con-struction personnel working this design change exited the containment.

A coordination problem developed between the individual who authorized the work and refueling personnel.

Immediate Corrective Acton All refueling operations were suspended and a plug was installed in the auxiliary building side of the penetration.

Scheduled Corrective Action No scheduled corrective action is required.

Actions Taken to Prevent Recurrence The proper steps in the refueling procedure will be changed to prevent breaking containment integrity because of penetration work during core alterations.

1367 I58