ML19257D708

LER 79-104/03L-0:on 791230,immediately Following Plant Trip, Steam Driven Emergency Feedwater Pump Started & Then Tripped on Turbine Overspeed.Caused by Isolated Steam Trap Resulting in Condensate Line.Administrative Controls Instituted

ML19257D708
Person / Time
Site:	Arkansas Nuclear
Issue date:	01/29/1980
From:	Pendergraft R ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19257D703	List: ML19257D702 ML19257D707 ML19257D708 ML19257D709
References
LER-79-104-03L, LER-79-104-3L, NUDOCS 8002050500
Download: ML19257D708 (1)

Text

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NRC FORM 366 U. S. NUCLE AR REGULATORY COMMi$$lON (7 77)

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? O 60 64 DOCEET Nuv8E m 6"> EVENT DATE 75 HfPOH1 DATE EVENT DESCRIPTION AND PROB ADLE CONSEQUENCES h roi2i l Immediately following a plant trip the stean driven Emergency Feed Water; 10121 i Pump (2P7A) started and then tripped on turbine overspeed. The electrict o ,  ; Emergency Feed Water Pump (2P7B) was operable and had sufficient flow l c s i for the transient response. The turbine trip on 2P7A was reset and the t ia j; pump was successfully started 3 times. Similar to LER's 50-368/79-055,I a , i 79-072, 6 79-081. Reportable per T.S.6.9.1.9b  ;

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i, jo;[ A steam trap on the steam supply line was isolated due to a blow-thru.  ;

i,,,ji problem. The isolated steam trap resulted in condensate in the supply ,

,,,,ji line which caused the over-speed trip. Additional administrative controhs

, 3  ; on trap isolation have been instituted to prevent reoccurrence. i i 4 I l C

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