05000219/LER-1980-055-03, /03L-0:on 801203,core Spray Sys High Drywell Pressure Switches RV-46B,RV-46C & RV-46D Tripped Above Tech Spec Levels.Caused by Instrument Repeatability.Switches Adjusted & Replacement Recommended

/03L-0:on 801203,core Spray Sys High Drywell Pressure Switches RV-46B,RV-46C & RV-46D Tripped Above Tech Spec Levels.Caused by Instrument Repeatability.Switches Adjusted & Replacement Recommended

ML19340D711
Person / Time
Site:	Oyster Creek
Issue date:	12/22/1980
From:	Fitzgerald M JERSEY CENTRAL POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19340D708	List: 05000219/LER-1980-055, Forwards LER 80-055/03L-0 05000219/LER-1980-055-03, /03L-0:on 801203,core Spray Sys High Drywell Pressure Switches RV-46B,RV-46C & RV-46D Tripped Above Tech Spec Levels.Caused by Instrument Repeatability.Switches Adjusted & Replacement Recommended
References
LER-80-055-03L, LER-80-55-3L, NUDOCS 8101050204
Download: ML19340D711 (1)

LER-1980-055, /03L-0:on 801203,core Spray Sys High Drywell Pressure Switches RV-46B,RV-46C & RV-46D Tripped Above Tech Spec Levels.Caused by Instrument Repeatability.Switches Adjusted & Replacement Recommended

Event date:
Report date:
2191980055R03 - NRC Website

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' ___ i o i : I ! During' routine suneillance testing, Core Spray System high drywell b.I o i a 1 i pressure swi'tches W-46B, W-46C and W-46D were found to trip at values

,,,,,; greater than the 2.0 psig limit given in the Tech. Spec., Table 3.1.1, j

3,,,,; item D.2.

The trip points for each were W-46P-2.14 psig, W-46C-2.11 g

i C ie t i psig, and W-46D-2.05 psig. The safety sip ificance is considered mini-

mal due to the fact that switch W-46A would have inatiated the required

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,,,,,, Core Spray Systen functions at the desired setpoint.

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40 48 42 43 44 47 CAUSE DESCRIPTICN AND CCARECTIVE ACTIONS Iitojl The cause of the occurrence was attributed to instrument repeatability.

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g ; Tech. Spcc. limit, yet still operate within their design accuracy.

l switches were adjusted to trip within the limit of 2.0 psig maximum, and

,, g i ; the PORC has recamended replacment of these type of switches.

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