05000318/LER-1979-031-03, /03L-0:on 790903,spurious Trips on Reactor Protection Sys Channel C High Power Trip Units Occured.Cause Not Stated.Temp Element 2-TE-122HC Replaced

/03L-0:on 790903,spurious Trips on Reactor Protection Sys Channel C High Power Trip Units Occured.Cause Not Stated.Temp Element 2-TE-122HC Replaced

ML19209A295
Person / Time
Site:	Calvert Cliffs
Issue date:	10/01/1979
From:	Lagiewski J, Rizzo P BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19209A291	List: 05000318/LER-1979-031, Forwards LER 79-031/03L-0 05000318/LER-1979-031-03, /03L-0:on 790903,spurious Trips on Reactor Protection Sys Channel C High Power Trip Units Occured.Cause Not Stated.Temp Element 2-TE-122HC Replaced
References
LER-79-031-03L, LER-79-31-3L, NUDOCS 7910030480
Download: ML19209A295 (1)

LER-1979-031, /03L-0:on 790903,spurious Trips on Reactor Protection Sys Channel C High Power Trip Units Occured.Cause Not Stated.Temp Element 2-TE-122HC Replaced

Event date:
Report date:
3181979031R03 - NRC Website

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While operating at steady state power, spurious trips on RPS Channel "C" Hi

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Power trip units occurred on the following dates 9-3-79, 9-21-79 and 9-22-79.

i o,3 ; i In each case, Channel "C" High Power, TM/LP and 3xial flux offsets were by-j o

4, io isi passed per T.S.3.3.1.1, Action 2.

All other RPS trip units remained in service o e I throughout the event. LER 79-27 U-2 describes e similar event.

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1. e CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l Reolaced temperature element 2-TE-122 HC under aintenance Request 0-78-3964 l

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