05000368/LER-1980-054-03, /03L-0:on 800721,control Room Emergency Chiller 2VE-1B Found Inoperable During Mode 1 Operation.Caused by Unit Tripping on High Pressure Due to Improperly Operating Control Valve 2CV-1506-2.Control Valve Repaired

/03L-0:on 800721,control Room Emergency Chiller 2VE-1B Found Inoperable During Mode 1 Operation.Caused by Unit Tripping on High Pressure Due to Improperly Operating Control Valve 2CV-1506-2.Control Valve Repaired

ML19344B093
Person / Time
Site:	Arkansas Nuclear
Issue date:	08/19/1980
From:	Pendergraft R ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19344B085	List: 05000368/LER-1980-053-03, /03L-0:on 800721,CEAC 1 Failed During Mode 1 Operation.Cause Not Determined.Ceac Sys Software Reloaded, Periodic Tests Performed & Failure Indications Returned to Normal.Ceac Returned to Operable Status on All Channels 05000368/LER-1980-054-03, /03L-0:on 800721,control Room Emergency Chiller 2VE-1B Found Inoperable During Mode 1 Operation.Caused by Unit Tripping on High Pressure Due to Improperly Operating Control Valve 2CV-1506-2.Control Valve Repaired 05000368/LER-1980-055-03, /03L-0:on 800721,PPS Channel D Received Spurious Dnbr/Lpd Trips During Mode 1 Operation.Caused by Fluctuating CPC Dnbr/Lpd Temp Input Calculations.Temp Transmitter 2TT- 4711-4 Electrical Leads Checked & Tightened ML19344B084
References
LER-80-054-03L, LER-80-54-3L, NUDOCS 8008250560
Download: ML19344B093 (1)

LER-1980-054, /03L-0:on 800721,control Room Emergency Chiller 2VE-1B Found Inoperable During Mode 1 Operation.Caused by Unit Tripping on High Pressure Due to Improperly Operating Control Valve 2CV-1506-2.Control Valve Repaired

Event date:
Report date:
3681980054R03 - NRC Website

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v U.S. NUCLE AR REGULATORY COMMISSION NRC FORM 366 (1178 LICENSEE EVENT REPORT EXHIBIT A CONTROL SLOCu:: l l 1 l l 1 lh (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

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a 9 uCENSEE CODE 88 1

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CON'T 101il 68 69 EVENT DATE 7e 75 HEPORT DATE 80 60 64 DOCKET NUM8ER 7

8 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h During Mode 1 operation, the Control Room Emergency Chiller (2VE-18) was i o 2 i found to be inoperable following an attempted start from the Control Room 4 o 3 i

lo la j i The alternate chiller, 2VE-1B, was started and functioned properly.

Maini tenance personnel were notified.

This cccurrence is similar to LER i

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CAUSE DESCRIPTION AND CORRECflVE ACTIONS h lInvestigation revealed the coolers service water control valve (2CV-1506-a) liiOi j,,, j iwould not operate properly causing the unit to trip on high pressure. Thei I Control Valve was reoaired and 2VE-1B was returned to service meetina j

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