05000368/LER-1978-032-03, /03L-0 on 781228:during Mode 2 operation,2P7A, Emergency Feedwater Pump a Tripped on Overspeed When Feeding Steam Generators.Cause Was Damaged Lead in Speed Control Unit

/03L-0 on 781228:during Mode 2 operation,2P7A, Emergency Feedwater Pump a Tripped on Overspeed When Feeding Steam Generators.Cause Was Damaged Lead in Speed Control Unit

ML19269C287
Person / Time
Site:	Arkansas Nuclear
Issue date:	01/25/1979
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19269C282	List: 05000368/LER-1978-029-03, /03L-0 on 781227:in Mode 1 Operation,During Main Turbine Roll,Main Steam Relief Valve 2PSV1053 Lifted,Due to Steam Dump Valve Failures.Valve Failed to Reseat,Causing RCS Temp to Drop 107 Feet within 52 Min 05000368/LER-1978-030-03, /03L-0 on 781227:in Mode 1 Operation,During Main Turbine Roll,Main Steam Relief Valves 2PSV1053 Lifted,Due to Steam Dump Valve Failures.Failed to Reseat,Causing Excessive RCS Cooldown 05000368/LER-1978-032-03, /03L-0 on 781228:during Mode 2 operation,2P7A, Emergency Feedwater Pump a Tripped on Overspeed When Feeding Steam Generators.Cause Was Damaged Lead in Speed Control Unit ML19269C281
References
LER-78-032-03L, LER-78-32-3L, NUDOCS 7901310052
Download: ML19269C287 (1)

LER-1978-032, /03L-0 on 781228:during Mode 2 operation,2P7A, Emergency Feedwater Pump a Tripped on Overspeed When Feeding Steam Generators.Cause Was Damaged Lead in Speed Control Unit

Event date:
Report date:
3681978032R03 - NRC Website

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NRC FORM 366 U. S. NUCLE AR REGULATORY COMMISSION (7 77)

LICENSEE EVENT REPORT EXHIBIT A CONTROL BLOCK-l l l l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI I

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goi3i i overspeed when started for feeding steam generators violating O

a T.S.3.7.1.2.

Redundant Emergency Feedwater pump was available. No i similar occurrences.

Reportable per T.S.6.9.1.9(b).

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cat 1SE DESCRIPTION AND CORRECflVE ACTIONS h li10; Investigation revealed a damaged lead in speed control unit.

Lead was i,i,,irepaired,EmergencyFeedwaterPump,2P7A,restoredtoserviceasrequireq i 7 I by Action Statement T.S.3.7.1.2.

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