ML19316A434

LER 78-002/03L-01:on 780105,isolation Valve FDW-108 Failed to Close.Caused by Inability to Withstand Necessary Environ. Valves FDW-106 & 108 Will Be Replaced by Appropriately Designed Valves

ML19316A434
Person / Time
Site:	Oconee
Issue date:	02/28/1978
From:	Ken Wilson DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19316A426	List: ML19316A425 ML19316A434 ML19316A439 ML19316A441 ML19316A444 ML19316A452
References
LER-78-002-03L, LER-78-2-3L, NUDOCS 7912110688
Download: ML19316A434 (1)

Text

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l -) l 21 I \* 1040. after a sample wits taken from the OTSG. FDW-108 failed to close. I t3,2; ; It's redundant isolation valve FD'.1-107 operated properly so containment ,

la14l l integrity was maintained. The valve was repacked and cycled to insure  ;

g .3 , , j i operability. Since containment integrity was not . jeopardized, the health t3 sit and safety of the public were not e ndan;;e red .  ;

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Failure of this type has occurred on numerous occasions, evidently indicat inq li t i 1 I th,t this valve simp 1v cannot withstand the necessary environment. Therefore,g Wl the valvos (FDW 106, 108) wil_1 be replaced in the future by valves of ,

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