05000313/LER-1979-008-03, /03L-0 on 790621:emergency Feed Actuation Received When once-through Steam Generator a Startup Level Transmitter Selection Was Shifted.Caused by Overspeed Trips Due to Water in Steam Supply Line

/03L-0 on 790621:emergency Feed Actuation Received When once-through Steam Generator a Startup Level Transmitter Selection Was Shifted.Caused by Overspeed Trips Due to Water in Steam Supply Line

ML19242A182
Person / Time
Site:	Arkansas Nuclear
Issue date:	07/25/1979
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19242A179	List: 05000313/LER-1979-008, Forwards LER 79-008/03L-0 05000313/LER-1979-008-03, /03L-0 on 790621:emergency Feed Actuation Received When once-through Steam Generator a Startup Level Transmitter Selection Was Shifted.Caused by Overspeed Trips Due to Water in Steam Supply Line
References
LER-79-008-03L-01, LER-79-8-3L-1, NUDOCS 7907310453
Download: ML19242A182 (1)

LER-1979-008, /03L-0 on 790621:emergency Feed Actuation Received When once-through Steam Generator a Startup Level Transmitter Selection Was Shifted.Caused by Overspeed Trips Due to Water in Steam Supply Line

Event date:
Report date:
3131979008R03 - NRC Website

text

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'S N f,064 s D AT E 50 EVENT DE SCRIPilON AND PROB ABLE r.ONSEQUENCE S Io121i During zero Power Physics Testing, Emergency Feed Actuation was received ;

L when the "A" 0TSG startup level transmitter selection was shif ted.

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!.o_w I steam driven ECW pump, P7A, tripped on overspeed.

Selecticn was shifted,

n s i back artd_tht _pumpt were stopped.

P7A was manually started and overspeed i lo le,1 I tripped again.

There have been no similar occurrences.

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1. 4 47 CausE of:CR# TION ANO CC%EC DVE ACTIO% h li lol l invottigation revealed overspeed trips were due to water in steam supply ;

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The steam traps upstream of the supply valves were isolated i

2 I during the previous plant heatup.

Traps were placed in service and l ' !,1 l EFW pump operability was proven.

Procedures have been modified to FrT- : 1 include the traos in the valve line0p.

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