05000366/LER-1980-132-03, /03L-0:on 800910,pressure Switch 2E21-N008B Activated at 94 Psig Rather than 100 Psig.Caused by Setpoint Drift.Switch Recalibr & Tested Successfully

/03L-0:on 800910,pressure Switch 2E21-N008B Activated at 94 Psig Rather than 100 Psig.Caused by Setpoint Drift.Switch Recalibr & Tested Successfully

ML19338E870
Person / Time
Site:	Hatch
Issue date:	09/30/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19338E863	List: 05000366/LER-1980-132, Forwards LER 80-132/03L-0 05000366/LER-1980-132-03, /03L-0:on 800910,pressure Switch 2E21-N008B Activated at 94 Psig Rather than 100 Psig.Caused by Setpoint Drift.Switch Recalibr & Tested Successfully
References
LER-80-132-03L, LER-80-132-3L, NUDOCS 8010060249
Download: ML19338E870 (2)

LER-1980-132, /03L-0:on 800910,pressure Switch 2E21-N008B Activated at 94 Psig Rather than 100 Psig.Caused by Setpoint Drift.Switch Recalibr & Tested Successfully

Event date:
Report date:
3661980132R03 - NRC Website

text

WRC F ORM 36G l7 77)

LICENSEE EVENT REPORT

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LICENSEE CODE 14 15 LICENSE NUMBEH 25 16 LICENSE TYPE Jo 57 L A T $8 CON oIil

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8 00 GI DOCKET NUV8ER 6d 63 EVENT DATE 74 7b REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o 2 l During full power operation while performing HNP-2-3206, Core Spray Pump I

o 3 l Discharge Pressure Interlock Functional Test and Calibration, pressure l

Io [41 l switch 2E21-N008B actuated at 94 psig decreasing.

Tech Spec Table 3.3.3-2, i

Item 4.e requires that core spray pump disr.harge pressure switch setpoint l

[o isl l lo Ic j l be 2100 psig decreasing. No significant occurrence took place due to l

10 l 7 l l this event. This is not a repetitivo event.

There were no effects upon l

iois j l public health and safety due to this event.

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33 J4 35 36 31 40 41 42 43 44 47 CAUSL' OESCRIPTION AND CORRECTIVE ACTIONS h liiol l The cause of this event was switch setpoint drif t.

The switch, manufactured I

li lil I by Barksdale, was recalibrated per HNP-2-5279, Barksdale Pressure Switch Calibration. The switch was then functionally tested successfully per l

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HNP-2-3206. The unit is now in full compliance.

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LER #: 50-366/1980-132 Licensee:

Georgia Power Company Facility Name: Edwin I. Hatch Docket No. 50-366 i.

. Narrative Report for LER 50-366/1980-132.

4 During full power operation on September 10, 1980, while performing HNP-2-3206, Core Spray Pump Discharge Pressure Interlock Functional Test and Calibra' tion, i

pressure switch 2E21-N008B actuated at 94.psig decreasing.

Tech Spec Table 3.3.3-2, Item 4.e requires that the core spray pump discharge pressure switch i

setpoint be 2100 psig decreasing.

The cause of this event was switch setpoint drift.

The switch, a Barksdale l

lbdel B2T, was recalibrated per HNP-2-5279, Barksdale Pressure Switch Calibration.

1 The switch was then functionally tested successfully ~ per HNP-2-3206.

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This is not a repetitive event.

A generic review of the event did not-reveal any inherent problems. A different type switch is used in this application on Unit I.

No.significant occurrence Udok place as a result of this event.

There were no effects upon public health and safety due to this event.

The unit-is now in full compliance with the requirements and no fuither. reporting is required.

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