ML19256G505

LER 79-092/03L-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

ML19256G505
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: ML19256G490 ML19256G492 ML19256G496 ML19256G500 ML19256G503 ML19256G505
References
LER-79-092-03L, LER-79-92-3L, NUDOCS 7912310409
Download: ML19256G505 (1)

Text

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NRC TORM 366 U. S. NUCL E AR REGUL ATORY CoeduissiON (7 77) 1.lCENSEE EVENT REPORT EXHIBIT A CONTROLBLOCK l l l l l l lh (PLE ASE PRINT OR TYPE ALL REQUtRED INFORMATIONI o i l AlR l A l Nl 0 ] p lgl 0 l0 l -l0 l 0 l 0l Og 0 l- l 0 l0 lg4 l1 l 1 l1 l 167 Clgl l lg 7 8 , LICENsti CODE to 16 license NuveEse 26 20 Lec t N>E ivri Jo A T se CON'T o i "$"J IL l@l0 l 5 p l010 l31618 l@l1 68 69 i P EVENT lo 1117 DATE lo l@ 1 l PNFPORf 74 76 l? IDATE 117 l o l@80 7 8 60 6- DOCsLET NUMgE m f5T211 - EVENT Durino DESCRIPilON Mode 2 operation. AND PROBASLE with the electric CONSEQUENCES driven Emer9ency h Feedwater i 10 i 3 i i pump, 2P7B, in service as an auxiliary feedwater pump for normal startup o a i Steam Generator feed. EFW flow control valve. 2CV-1025-1. failed to closel e s I on demand from the Control Room. The valve failed in the EFW, or safe. I lo is i l position. All redundant EFW valves were successfully stroked from the i IolilI Control Room. This occurrence is similar to LER 50-368/79-090. 79-0E9. I o o i 79,088 and 79-043. Other LER's involvina valve 2CV-1025-1 are 50-36E/ I

'79-068, 7,9a054, L9-p51,c29,-035,78-028 and 78-009.Semrtablg, per T.S.6.911.9.b.

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,i3 I filled and vented. The valve was declared operable within 19 hours2.199074e-4 days <br />0.00528 hours <br />3.141534e-5 weeks <br />7.2295e-6 months <br />, t Lu.]. I.meetina the reouirements of Action Statement T.S. 3.7.1.2.

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