ML19350E490

Updated LER 80-030/03X-1:on 800520,steam Driven Emergency Feedwater pump,2P7A,turbine driver,2K3,tripped on Overspeed Following Manual Start.Caused by Design Deficiency.Governor Valve Control Modified

ML19350E490
Person / Time
Site:	Arkansas Nuclear
Issue date:	06/19/1981
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19350E481	List: ML19350E480 ML19350E483 ML19350E487 ML19350E490 ML19350E491 ML19350E492
References
LER-80-030-03X, LER-80-30-3X, NUDOCS 8106230163
Download: ML19350E490 (1)

Text

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avsNT DtSCalPTION ANO PROe ABL$ CONSEQUENCf S bio o , iDuring Mode 1 operation, the Std6m Driven Emergency Feedwater (EFW) Pump, j

[gg 12P7A, turbine driver, 2X3, tripped on overspeed following a manual start. I r5Til ITha Electric Driven EFW Pump, 2P78, and associated flowpaths remained op- 1 ITITl Inrahin This nernerenco is similar tn ! rR'c En 96R/7A n12. 74 n64 7_Q n791

o. 179-081,79-104 & 80-022. Reportable per T.S. 6.9.1.9.b i I

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1 43 4e of CAUSE Of SCniPTtON AND COAREC(tVE ACTIONS 27 EE] ICause of the EFW turbine overspeed trips was determined to be design __j g g)irelated. Modifications to the governor valve control optimized covernor i E[I] 1 valve response to speed sionals. A testing nrogram verifind Fru turhinn i E U)Ireliability. Refer to i.ER 50-358/80-050/03X-4 for fu. ther information. I a l I

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