05000366/LER-1980-089-03, /03L-0:on 800530,while Performing HNP-2-3315,torus Suction Valves 2E41-F041 & 2E41-F042 Failed When Given Open Signal.Torus Valves Shorted Out Due to Condensation in HPCI Room.Cause of Condensation Was Steam Leakage Around S

/03L-0:on 800530,while Performing HNP-2-3315,torus Suction Valves 2E41-F041 & 2E41-F042 Failed When Given Open Signal.Torus Valves Shorted Out Due to Condensation in HPCI Room.Cause of Condensation Was Steam Leakage Around Seal

ML19318C466
Person / Time
Site:	Hatch
Issue date:	06/24/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19318C455	List: 05000366/LER-1980-089, Forwards LER 80-089/03L-0 05000366/LER-1980-089-03, /03L-0:on 800530,while Performing HNP-2-3315,torus Suction Valves 2E41-F041 & 2E41-F042 Failed When Given Open Signal.Torus Valves Shorted Out Due to Condensation in HPCI Room.Cause of Condensation Was Steam Leakage Around S
References
LER-80-089-03L, LER-80-89-3L, NUDOCS 8007010503
Download: ML19318C466 (2)

LER-1980-089, /03L-0:on 800530,while Performing HNP-2-3315,torus Suction Valves 2E41-F041 & 2E41-F042 Failed When Given Open Signal.Torus Valves Shorted Out Due to Condensation in HPCI Room.Cause of Condensation Was Steam Leakage Around Seal

Event date:
Report date:
3661980089R03 - NRC Website

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U. S. NUCLE A] E E';ULATORY COMMISSION WRC FORM 366 tr-77)

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60 61 DOCKE T NUMBER EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h l

O 2 l During normal reactor operation, while performing HNP-2-3315. HPCI Pump Suction Source Instrument FT&C, Torus suction valves, 2E41-F041 and 2E41-l 0 3 l 0 4 l

F042, failed when given an open signal.

HPCI was then declared inoperable l

l3 lsi l per Tech Spec 3/4.5.1.

There were no ef fects to public health and safety l

l~ js ] l as a result of this incident. The 2E41-F041 had failed previously as re-l l0 l7l l ported on Repertable Occurrence Report No. 50-366/1979-114.

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40 41 42 43 44 47 33 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i O l It was discovered that Torus suction valves, 2E41-F041 and 2E41-F042 had l

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of condensation was steam leaking around a defective pressure seal on 2E41-l

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F009. The valve taotors were repaired and a new pressure seal was installed l

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HSP-2-3315 was then performed with satisfactory results.

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NARRATIVE

REPORT Georgia Power Company Plant E. I. Hatch Baxicy, Georgia 31513 Reportable Occurrence Report No. 50-366/1980-089.

During normal operation, while performing HNP-2-3315, llPCI Pump Suction Source Instrument ET&C, 2E41-F041 and 2E41-F042, Torus Suction Valves, fai Led when given a signal to open. -IIPCI was.then declared inoperable per Tech Spec 3/4.5.1.

There were no ef fects to public health and safety as a result of this incident.

i An investigation revealed that both. Torus. suction valves, 2E41-F041 and.2E41,

F042, were tripped and shorted'out due to an excessive amount of condensation.

in the llPCI room area. The cause of the condensation was due to steam leak-

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ing around a: defective pressure seal on 2E41-F009 Check valve.. The torus suction valve motors were repaired and eturned to service. The pressure seal 7

on 2E41-F009 Check valve was replaced and llNP-2-3315 was then performed satis-i

factory, i

The 2E41-F041 motor f ailure is a repetitive occurrence as last reported on j

Reportabic Occurrence Report No. 50-366/1979-114.

Ilowever, the cause was not the same.

Plant flatch Unit I utilize the same type motors. There has been no known failures of these valve motors.

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