05000219/LER-1980-056-03, /03L-0:on 801204,main Steam Line High Flow Sensors RE-22C & RE-22G Tripped Above Tech Spec Levels.Caused by Instrument Repeatability.Sensor RE-22C Reset.Microswitch in Sensor RE-22G Replaced

/03L-0:on 801204,main Steam Line High Flow Sensors RE-22C & RE-22G Tripped Above Tech Spec Levels.Caused by Instrument Repeatability.Sensor RE-22C Reset.Microswitch in Sensor RE-22G Replaced

ML19340D726
Person / Time
Site:	Oyster Creek
Issue date:	12/23/1980
From:	Fitzgerald M JERSEY CENTRAL POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19340D724	List: 05000219/LER-1980-056, Forwards LER 80-056/03L-0 05000219/LER-1980-056-03, /03L-0:on 801204,main Steam Line High Flow Sensors RE-22C & RE-22G Tripped Above Tech Spec Levels.Caused by Instrument Repeatability.Sensor RE-22C Reset.Microswitch in Sensor RE-22G Replaced
References
LER-80-056-03L, LER-80-56-3L, NUDOCS 8101050229
Download: ML19340D726 (1)

LER-1980-056, /03L-0:on 801204,main Steam Line High Flow Sensors RE-22C & RE-22G Tripped Above Tech Spec Levels.Caused by Instrument Repeatability.Sensor RE-22C Reset.Microswitch in Sensor RE-22G Replaced

Event date:
Report date:
2191980056R03 - NRC Website

text

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U.1. NUCLEAR REtULATCGY COMMISSION (7 771 LICENSEE EVENT REPORT

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(PLEASE PRINT OR TYPE ALL REcutRED INFORMATION)

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60 68 QQCK ET NWUS ER 68 69 EVENT CAfg 74 7S MEPORT QATE 80 EVENf CESCRIPTION AND PRC8AELE CCNSECUENCES h Ie 1:l t During surveillance testing, the Main Stea:n Line high flow senscrs..

I l RE-22C and R'E-22G tripped at values greater than the limit of 97.5 psig I

,o,3, g o,,, ; given in the Technical Specifications, Table 3.1.1, iten B.2.

'Ihe trip I

i333, ; point values were 98.5 psig for both sensors. The safety significance I

i is considered nuninal because the redundant switches RE-22D and RE-22H I

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steam isolation functions.

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l The cause of the occurrence was due to instrument repeatability. Sensor I

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RE-22C was reset tc trip within the desired level, yet sensor RE-22G had 1

,to have a microswitch replaced before it would reset to trip at the I

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with a suitable qualified model.

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