ML19352A157

LER 81-011/01T-0:on 810306,per IE Bulletin 79-01B, Containment Isolation Valves CAV-1,3,4,5 & 126 Were Found Incapable of Meeting Environ Submergence Qualification. Caused by Potential Electrical Short Due to Flooding

ML19352A157
Person / Time
Site:	Crystal River
Issue date:	03/06/1981
From:	Lobo W FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19352A156	List: ML19352A155 ML19352A157
References
IEB-79-01B, IEB-79-1B, LER-81-011-01T, LER-81-11-1T, NUDOCS 8103110553
Download: ML19352A157 (1)

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[a i 21 1 At 1630 durino our evaluation of I.E. Bulletin 79-018, it was discoveredr gi that containment isolation valves CAV-1, 3, 4, 5 and 126 are not cacable, g , of meeting the environmental qualification due to submergence following 3 f7TT1 1 a LOCA. CAV-2, 6, and 7 provide redundant isolation capability. - There i

mi is no effect upon the health or safety of the general public. This is ,

ITT71 1 the first occurance or event of this type and the first event under 1

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g i The cause is attributed to potential electrical short due to flooding ,

g i in the Containment following a LOCA. Emergency Procedure EP-106 will bei gi revised to dedicate an ooerator to de-energize these valves if a LOCA i g i occurs. In the interim, a short term instruction has been issued to i ,

accomplish this action. Detailed supplement report will follow within 1,4 days.

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