05000336/LER-1979-036-03, /03L-0:on 791101,during Cold Shutdown,Containment Personnel Air Lock Inner & Outer Doors Opened at Same Time for 30-s.Caused by Bent Operating Shaft.Shaft Straigtened & Lock Operable

/03L-0:on 791101,during Cold Shutdown,Containment Personnel Air Lock Inner & Outer Doors Opened at Same Time for 30-s.Caused by Bent Operating Shaft.Shaft Straigtened & Lock Operable

ML19260B183
Person / Time
Site:	Millstone
Issue date:	11/30/1979
From:	Clement C NORTHEAST UTILITIES
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19260B181	List: 05000336/LER-1979-034, Forwards LER 79-034/03L-0 05000336/LER-1979-036-03, /03L-0:on 791101,during Cold Shutdown,Containment Personnel Air Lock Inner & Outer Doors Opened at Same Time for 30-s.Caused by Bent Operating Shaft.Shaft Straigtened & Lock Operable
References
LER-79-036-03L, LER-79-36-3L, NUDOCS 7912070385
Download: ML19260B183 (1)

LER-1979-036, /03L-0:on 791101,during Cold Shutdown,Containment Personnel Air Lock Inner & Outer Doors Opened at Same Time for 30-s.Caused by Bent Operating Shaft.Shaft Straigtened & Lock Operable

Event date:
Report date:
3361979036R03 - NRC Website

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60 Gl DOCKE T NUUGER 68 63 EVENT OAlE 74 75 HEPOhIDATE E0 EVENT DESCntPTION AND PROBABLE CONSEQUENCES h

[ The plant was being cooled to COLD SHUTDOWN.

The containment oorsonnel air lock I

o-2 inner and outer doors were opened at'the same time for approximately 30 seconds.

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Similar event - LER 78-7/3L dated 5/12/78.

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.CAUSE DESCHIPTION AND CORRECTIVE ACTIONS li l o l 1 The cause of the failure was a bent operating shaft (piece 14 Figure II, Chicago I

Bridge and Iron technical manual 69-5709V.

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