05000318/LER-1980-018-03, /03L-0:on 800311,during Routine Insp Tour,Watch Stander Noticed Leak Weld on 23 Charging Pump Suction Relief Valve Causing Degradation of Sys Designed to Contain Radioactive Fluid.Caused by vibration-induced Metal Fatigue

/03L-0:on 800311,during Routine Insp Tour,Watch Stander Noticed Leak Weld on 23 Charging Pump Suction Relief Valve Causing Degradation of Sys Designed to Contain Radioactive Fluid.Caused by vibration-induced Metal Fatigue

ML19305D859
Person / Time
Site:	Calvert Cliffs
Issue date:	04/10/1980
From:	Davis S, Huseby D BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19305D852	List: 05000318/LER-1980-018, Forwards LER 80-018/03L-0 05000318/LER-1980-018-03, /03L-0:on 800311,during Routine Insp Tour,Watch Stander Noticed Leak Weld on 23 Charging Pump Suction Relief Valve Causing Degradation of Sys Designed to Contain Radioactive Fluid.Caused by vibration-induced Metal Fatigue
References
LER-80-018-03L, LER-80-18-3L, NUDOCS 8004150638
Download: ML19305D859 (1)

LER-1980-018, /03L-0:on 800311,during Routine Insp Tour,Watch Stander Noticed Leak Weld on 23 Charging Pump Suction Relief Valve Causing Degradation of Sys Designed to Contain Radioactive Fluid.Caused by vibration-induced Metal Fatigue

Event date:
Report date:
3181980018R03 - NRC Website

text

60-DDD LICENSEE EVENT REPORT 10NTROL BLOCK: l l

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8 COWT I0I'I SO LLJ@l0151010101311 18 l@l01311 11 18 10 l @ l0 14 11 01810l@

8 60 61 DOCKET NUMSER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 1012l I At 2154 while making a routine inspection tour, the watch stander noticed

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io ia i I a leakina weld on #23 charging pump suction relief valve which caused a l

1o I4 i Idearadation of a system desianed to contain radioactive fluid (T.S. 6.9.1.9.d).

I lo 151 IThe pumo was removed from service at 1530 on 3/13/80. The two redundant l

l o is i I charaina oumos remained operable. LER 78-11 describes a similar event.

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CODE S SC E COMPONENT CODE SUSCOdE SU E

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l S l 0 l 3 l 0 lg 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h li l 0 l l This leak was caused by vibration induced metal fatigue in the heat affected i

iiiii l area of a socket welded pipe reducer connecting a 3/4" relief valve line to 1

i,,,,;#23 charging pump suction. A weld repair was made and a system design change iii3i l has been initiated to reduce Vibration in these lines.

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