05000317/LER-1978-055-03, /03L-0 on 781209:water Leak from Cracked Weld on No 11 Reactor Coolant Charging Pump Discharge Isolation Valve Noted.Caused by Seal Weld Failure on Gate Valve

/03L-0 on 781209:water Leak from Cracked Weld on No 11 Reactor Coolant Charging Pump Discharge Isolation Valve Noted.Caused by Seal Weld Failure on Gate Valve

ML19289C414
Person / Time
Site:	Calvert Cliffs
Issue date:	01/05/1979
From:	Carroll J, Miernicki M BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19289C411	List: 05000317/LER-1978-055, Forwards LER 78-055/03L-0 05000317/LER-1978-055-03, /03L-0 on 781209:water Leak from Cracked Weld on No 11 Reactor Coolant Charging Pump Discharge Isolation Valve Noted.Caused by Seal Weld Failure on Gate Valve
References
LER-78-055-03L, LER-78-55-3L, NUDOCS 7901120154
Download: ML19289C414 (1)

LER-1978-055, /03L-0 on 781209:water Leak from Cracked Weld on No 11 Reactor Coolant Charging Pump Discharge Isolation Valve Noted.Caused by Seal Weld Failure on Gate Valve

Event date:
Report date:
3171978055R03 - NRC Website

text

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60 61 COCKET NUM8ER 68 69 EVENT DATE 74 7S REPORT CATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h F6 TT11 During normal operation the plant operator discovered a water leak from a l6 TTl Lcracked weld on 11 reactor coolant charging pump discharge isolation valve.

l The pump was imediately removed from service and the leak isolated. Two I

0 F5 TTl I redundant charging pumps remained operable at all times. This is not a g

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33 34 36 36 37 40 41 42 43 44 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 lCause of the leakane was a body to bonnet seal weld failure on this 2 inch I

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W l gate valve. This seal weld is not a cressure boundarv. Weld was renaired I

land valve returned to service. No further corrective actier is recuired I

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