ML19260B183

LER 79-036/03L-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

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: ML19260B180 ML19260B183
References
LER-79-036-03L, LER-79-36-3L, NUDOCS 7912070385
Download: ML19260B183 (1)

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7 8 60 Gl DOCKE T NUUGER EVENT DESCntPTION AND PROBABLE CONSEQUENCES h o- 2 [ The plant was being cooled to COLD SHUTDOWN. The containment oorsonnel air lock I l0 l3 l l inner and outer doors were opened at'the same time for approximately 30 seconds.

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l o 141 1 After discovery, the air lock was maintained locked or an operato_r was stationed o s I at the air lock. The plant was operated in accordance with the action statement l

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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 i i Bridge and Iron technical manual 69-5709V. The bent shaft was straightened and i l

Ii I 71 I the air lock restored to operability.

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