05000321/LER-1980-063-03, /03L-0:on 800612,while Performing Surveillance Procedure HNP-1-3102,reactor High Pressure Shutdown Cooling Mode Switch 1B31-N0l8B Found to Actuate Higher than Limit. Caused by Setpoint Drift.Switch Recalibr

/03L-0:on 800612,while Performing Surveillance Procedure HNP-1-3102,reactor High Pressure Shutdown Cooling Mode Switch 1B31-N0l8B Found to Actuate Higher than Limit. Caused by Setpoint Drift.Switch Recalibr

ML19329F973
Person / Time
Site:	Hatch
Issue date:	07/03/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19329F965	List: 05000321/LER-1980-063, Forwards LER 80-063/03L-0 05000321/LER-1980-063-03, /03L-0:on 800612,while Performing Surveillance Procedure HNP-1-3102,reactor High Pressure Shutdown Cooling Mode Switch 1B31-N0l8B Found to Actuate Higher than Limit. Caused by Setpoint Drift.Switch Recalibr
References
LER-80-063-03L-01, LER-80-63-3L-1, NUDOCS 8007110426
Download: ML19329F973 (2)

LER-1980-063, /03L-0:on 800612,while Performing Surveillance Procedure HNP-1-3102,reactor High Pressure Shutdown Cooling Mode Switch 1B31-N0l8B Found to Actuate Higher than Limit. Caused by Setpoint Drift.Switch Recalibr

Event date:
Report date:
3211980063R03 - NRC Website

text

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8 60 61 DOCKET NUMBER 95 69 LVENT DATE 14 75 RE* ORT DATE 80 EVENT DESCRIPTION AND PROllADLE CONSEQUENCES h gl While performing normal surveillance procedure HNP-1-3102, Reactor High l

0la] l Pressure Shutdown Cooling Mode, switch 1B31-No18B was found to actuate at l

o i4 l l 167 psi. The Technical Specifications limit is </=157.3 psi.

There was l

qT] l no effect on public health or safety. The redundant switch was operable.

l 0 In 1 l This switch is a Static-O-Ring.

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The unit is now in full compliance and no further reporting is required.

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NARRATIVE

REPORT Georgia Power Company Plant E.

I. I!atch Baxley, Georgia Reportable Occurrence Report No. 50-321/1980-063.

While performing normal surveillance procedure IINP-1-3102, Reactor Iligh Pressure Shutdown Cooling Mode Functional Test and Calibration, switch IB31-N018B actuated at 167 psi increasing.

The setpoint on this switch is 147.3 psig 15.

The Technical Specification limit is </=157.3 psig.

This switch is a reactor pressure permissive to operate valve lEll-F015.

The 1B31-N018A switch is a redundan't switch in a parallel circuit'with the IB31-N018B switch and worked correctly.

The corresponding switches on Unit II were checked and operated correctly. Switch IB31-N018B was recalibrated and returned to service.

The unit is now is full compliance with the requirements and no further reporting is required.

This is a non-repetitive occurrence on this switch.

This switch is a Static-O-Ring.

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