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

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/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
ML19256G500
Person / Time
Site: Arkansas Nuclear Entergy icon.png
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:
References
LER-79-090-03L, LER-79-90-3L, NUDOCS 7912310399
Download: ML19256G500 (1)
v • d • e


LER-1979-090, /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
Event date:
Report date:
3681979090R03 - NRC Website
v • d • e

text

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NRC F ORM 3E6 U. 5 NUCLE AR REGUL ATORY COMh81SSION (7 77)

LICENSEE EVENT REPORT EXHIBIT A CONTROL BLOCit:

l l l l 1 lh (PLE ASE PRINT OR TYPE ALL REQUtRED INFORMATION!

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60 61 DOCsLET NusegER ha M

EVENT DATE 24 FS HFPOHTDATE SC EVENT OESCRIPTION ANO PROS ABLE CONSEQUENCES h foTO I Durino Mode 3 operation, with the electric driven Fmargency Feedwater i

I pumo, 2P78, in service as an auxiliary feedwater pump for normal startup I o

2 Steam Generator food. FFW flow cnntrn1 valvo. PrV-1025-1. failed tn clnspi o

4 I on demand from the Control Room.

The valve failed in the EFW, or safe, i

n s

o s I cosition.

All redundant rFW valves worn surcossfully strnked fron1 tho _ __I fTTTII Control Room. This occurrenca is similar to LFR 50-368/79-089. 79-0E8.

I i 79-043.

Other occurrences involving 2CV-1025-1 are 50-368/79-068,79-054,,

o o

'79-051, 7,9,E035. M-p28,gnd,78-009.

Reportable per J,,,S. 64,1.9.b.

CCOE LCCE SUSCODE (QMPONENTLQUE

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3J 3a Ja 36 Je C AUSE DE50R.*TICN AND CORREC flVE ACTIONS h 1 Investigation revealed that the valve coerator's hydraulic syste' was lows i

o i of fluid.

No leaks could be found.

The system was filled and the valve i i

i li 121 I was daclared coorahlo within four (41 hours4.74537e-4 days <br />0.0114 hours <br />6.779101e-5 weeks <br />1.56005e-5 months <br /> _ rpeting the recuire ante of I U_L_J Action Statement T.S. 3.7.1.2.

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