05000368/LER-1979-089-03, /03L-0:on 791124,during Mode 3 Operation,Emergency Feedwater Flow Control Valve 2CV-1025-1 Failed to Close on Demand from Control Room.Caused by Trash in Valve Operator Hydraulic Sys & Hydraulic Snubber Out of Adjustment

/03L-0:on 791124,during Mode 3 Operation,Emergency Feedwater Flow Control Valve 2CV-1025-1 Failed to Close on Demand from Control Room.Caused by Trash in Valve Operator Hydraulic Sys & Hydraulic Snubber Out of Adjustment

ML19256G496
Person / Time
Site:	Arkansas Nuclear
Issue date:	12/21/1979
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19256G491	List: 05000368/LER-1979-088-03, /03L-0:on 791122,during Mode 3 Operation,Emergency Feedwater Flow Control Valve 2CV-1025-1 Failed to Close on Demand from Control Room.Caused by Valve Operator Hydraulic Pressure Being Low.Sys Vented 05000368/LER-1979-089-03, /03L-0:on 791124,during Mode 3 Operation,Emergency Feedwater Flow Control Valve 2CV-1025-1 Failed to Close on Demand from Control Room.Caused by Trash in Valve Operator Hydraulic Sys & Hydraulic Snubber Out of Adjustment 05000368/LER-1979-090-03, /03L-0:on 791125,during Mode 3 Operation,Emergency Feedwater Flow Control Valve 2CV-1025-1 Failed to Close on Demand from Control Room.Caused by Valve Operator Hydraulic Sys Being Low on Fluid.Sys Filled 05000368/LER-1979-091-03, /03L-0:on 791126,during Mode 3 Operation,Dissolved Oxygen Concentration of Reactor Coolant Sys Found Greater than 0.1 Ppm But Less than 0.2 Ppm.Caused by Large RCS Deboration 05000368/LER-1979-092-03, /03L-0:on 791201,during Mode 2 Operation,Emergency Feedwater Flow Control Valve 2CV-1025-1 Failed to Close on Demand from Control Room.Caused by Lack of Hydraulic Pressure Due to Low Fluid Level in Accumulator ML19256G490
References
LER-79-089-03L, LER-79-89-3L, NUDOCS 7912310393
Download: ML19256G496 (1)

LER-1979-089, /03L-0:on 791124,during Mode 3 Operation,Emergency Feedwater Flow Control Valve 2CV-1025-1 Failed to Close on Demand from Control Room.Caused by Trash in Valve Operator Hydraulic Sys & Hydraulic Snubber Out of Adjustment

Event date:
Report date:
3681979089R03 - NRC Website

text

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