ML19254C730

LER 79-074/03L-0:on 790925,secondary Containment Was Violated by Opening Both Doors of Refueling Floor Ventilation Room Air Lock.Caused by Outside Air Lock Door Becoming Ajar Due to Not Being Latched

ML19254C730
Person / Time
Site:	Hatch
Issue date:	10/12/1979
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19254C724	List: ML19254C723 ML19254C730
References
LER-79-074-03L-01, LER-79-74-3L-1, NUDOCS 7910170274
Download: ML19254C730 (2)

Text

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EVENT DATE 74 FS REFOR r Dr'E 80 S trJ 61 CCf.r E T NUYB E,4 EVENT DESCRIPTION AND FROBABLE CONSEoUENCE3 h

o 2 l During nomal plant ooeration secondary containmentms momentarily viola ted (T.S.3.7. I a

.o 3 l C.1) by opening both doors of the refueling floor ventilation room air lock. Personnelj io 4 l working inside the room had to use the interleck overfride to exit the room. l

,o s [ Apparently during their stay inside the room the outside door was either left open l io c) { or became ajar.

Immediately following the iricident secondary containment was proven 2 0 ti by performing plant procedure HNP-1-3663 to comply with Tech Spec 3.7.C.2. There was l o a I no effect on public health or safety. Violation of secondary containment is a (cont)

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di 42 43 44 di 33 J4 35 CAUSE oESCRIPTION AND conRECTIVE ACTIONS h ii o [ The cause of this event is the fact that the outside airlock door became ajar due t_'; I gi ji j not being securely latched or due to the outside door simply.being left ocen. Our I

, 7 l investigation could not determine how the door came open but points out the need for J r, 3; [ a design review of this type air lock. This review will consist of (1) the direction ot]

g,i.,i ; the door cwing. It presently swings with the air flow thus causing the dead bolt (cont)1 8 3 STA 3  % POMP OTHER STATUS ISC )

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NAME OF PREPAREH

Georgia Power Cor pany Plant Edwin I. Hatch Baxley, Georgia 31513 Reportable Occurrence Report No. 50-321/1979-074 Event Description and Probable Consequences (cont) repetive occurrence as last reported in LER-1-79-68.

Cause Description and Corrective Actions (cont) to carry the full force of the pressure differential between the Reactor Building and the air lock interior. (2) Possible installation of consnunications inside the ventilation room. Pr#sently none is installed.

(3) The possible installation of some type of automatic door closer.

Prcsently none is installed. This review will be conducted for all air locks of this type on bo'S units and a follow-up report with our findings will be submitted.

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