ML19340D726

LER 80-056/03L-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

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: ML19340D723 ML19340D726
References
LER-80-056-03L, LER-80-56-3L, NUDOCS 8101050229
Download: ML19340D726 (1)

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,o,3, l RE-22C and R'E-22G tripped at values greater than the limit of 97.5 psig I 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 ic !e ! i is considered nuninal because the redundant switches RE-22D and RE-22H I

c ; ; ; would have actuated at the desired level to initiate the required nnin [

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CAusE CESCRIPTICN AND CORRECTIVE ACTIONS h i

[i;ol l The cause of the occurrence was due to instrument repeatability. Sensor I

[,,,, ;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 i

,, ,,, gproper value. 'Ihe PORC has reuawaded that these switches be replaced I

,, , , , ;with a suitable qualified model. .  ;

I 80 7 8 9 f A %PCWER CTHER STATUS isCO R DISCOVERY 0ESCRIPTTON h L,'_L5J l E l@ l 0l 9 l 432l@ln NA l [B_j @ l Surveillance Test l e ,g, , 4 * * . '

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A a 9 to 68 49 Michael J. Fitzgerald (609) 693-6038 NAME OF P9E8ARER PHONE: 3