ML20039D453

LER 81-044/03L-0:on 811124,secondary Containment Isolation Damper on Air Ejector Room Exhaust Duct to Offgas Stack Failed to Close Completely When Operating Air Secured to Protect Damper.Cause Unknown.Investigation Continuing

ML20039D453
Person / Time
Site:	Duane Arnold
Issue date:	12/22/1981
From:	Varner D IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20039D449	List: ML20039D448 ML20039D453
References
LER-81-044-03L, LER-81-44-3L, NUDOCS 8201040106
Download: ML20039D453 (1)

Text

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io 2i I During normal operation, secondary containment isolation damper IV-AD-15 I p TTI I B on the air ejector room exhaust duct to the offaas stack failed to clo l l io t Ai i se completely. Prior to this failure, the damper had been cyclina opsn a I io;sl l nd closed repeatedly. When the operating air to the damper was secured t I t o is l l0 protect the damper, the damper failed to close comoletelv. To maintain I l a ! 71 I secondary containment inteority cer Tech. Soec. 3.7.C.1. the redundant i I t o is i I solation damoer was closed. No previous similar occurrences. I 7 s9 40 syf7EM CALs4 CAUSE Comp. VALVE CCOE CCoe sueCCCE COMPONENT CCCG sOSCCOE sueCCCE loist is 101@

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