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

/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

ML19344B098
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-80-055-03L, LER-80-55-3L, NUDOCS 8008250567
Download: ML19344B098 (1)

LER-1980-055, /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

Event date:
Report date:
3681980055R03 - NRC Website

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60 69 DOCKEY hum 8t m 68 63 EVENT DATE 74 FS HEPORT DATE 80 EVENT DESCRIPT80N AND PROBASLE CONSEQUENCES bio o 2 i During Mode 1 operation, "D" PP5 channel received spurious DNBR/LPD trips, o 3 i The channel "D" DNBR/LPD trips were bypassed placina the Rx. trip logic l

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PPS channels "A", "B"

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Other occurrences involving the PPS are LER 50-368/80-017, i

t o is i 180-028,80-033 and 80-048.

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gi leads were checked and tightened.

Follow instrument checkout "D" PPS was; i,i3i i returned to service meeting requirements of T.S. 3.3.1.1 Action 2a.

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