ML20052E913

LER 82-025/03L-0:on 820404,suppression Chamber to Drywell Vacuum Breaker Valve CV-4327D Failed to Close Completely. Caused by Pneumatic Cylinder Piston Stuck in mid-position. Piston Lubed & Valve Tested Satisfactorily

ML20052E913
Person / Time
Site:	Duane Arnold
Issue date:	05/03/1982
From:	Varner D IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20052E901	List: ML20052E899 ML20052E913
References
LER-82-025-03L, LER-82-25-3L, NUDOCS 8205110534
Download: ML20052E913 (1)

Text

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AEPCAT QATE P S 6G 6, COCKETNVMttM EVENT DESCRIPTION ANO PROSA8tE CCNSECUENCES h ioi2i i During cuid shutdown while performmq surveillance testing, suppression I g , chamber to drywell vacuum breaker valve, CV-4327D, failed to close compl I

,, g i i etely. Because the reacter was already in cold shutdown, the requirement I g i s of Technical Specification 3.7. A.4 were already met. An unusual event I g o is j g was declared for the loss of an enaineered safeguards system. There has I go;7; ] been one previous similar occurrence (see R0 81-21). I I

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• NAME Cf PREPA AE A PHONE:

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