ML19316A384

LER 78-008/03L-0:on 780315,valve 1FDW-108 Failed to Close. Failure Has Occurred Previously.Caused by Apparent Inability to Withstand Environ.Valves FDW-106 & 108 Will Be Replaced W/Valves of Appropriate Design

ML19316A384
Person / Time
Site:	Oconee
Issue date:	04/11/1978
From:	Ken Wilson DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19316A379	List: ML19316A378 ML19316A381 ML19316A384
References
LER-78-008-03L, LER-78-8-3L, NUDOCS 7912110645
Download: ML19316A384 (1)

Text

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Io t 2I lEveur At 0830, cascairnon after a sample Ano was racenste taken ccNssouescase 1B OTSG, 1FDW-108 @ from th failed to i {

ITTT1I close. The redundant isolation valve 1FDW-107 operated properly main- i l 1

g[ taining containment integrity. Since containment integrity was not ,

i io t si l jeopardized, the health and safety of the public were not endangered. ,

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se ,i, oi oi o i se g is g'?7is L9,TY3.,e i li to 1 l The initial corrective action was lubrication and cycling of valve. ,

g; Failure of this type has occurred on several occasions, evidently gl indicating that this valve simply cannot withstand the necessary ,

Ii,3i [ environment. Therefore, the valves (FDW-106 and -108) uill be replaced  ;

i i i .1 I in the future with valves of anorooriate design.

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