05000366/LER-1980-112-03, /03L-0:on 800723,during Steady State Operation, While Performing on HPCI Steam Line Delta P Flow Switch 2E41-N004,high Side micro-switch Found Inoperative.Caused by micro-switch Subcomponent Failure

/03L-0:on 800723,during Steady State Operation, While Performing on HPCI Steam Line Delta P Flow Switch 2E41-N004,high Side micro-switch Found Inoperative.Caused by micro-switch Subcomponent Failure

ML19344D971
Person / Time
Site:	Hatch
Issue date:	08/19/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19344D969	List: 05000366/LER-1980-112, Forwards LER 80-112/03L-0 05000366/LER-1980-112-03, /03L-0:on 800723,during Steady State Operation, While Performing on HPCI Steam Line Delta P Flow Switch 2E41-N004,high Side micro-switch Found Inoperative.Caused by micro-switch Subcomponent Failure
References
LER-80-112-03L, LER-80-112-3L, NUDOCS 8008260451
Download: ML19344D971 (2)

LER-1980-112, /03L-0:on 800723,during Steady State Operation, While Performing on HPCI Steam Line Delta P Flow Switch 2E41-N004,high Side micro-switch Found Inoperative.Caused by micro-switch Subcomponent Failure

Event date:
Report date:
3661980112R03 - NRC Website

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60 Gl DOCKET NUMBER G3 63 EVENT DATE 74 7S REPORT DA1E C0 EVENT DESCnirTION AND PROH ABLE CONSEQUENCES h 0121 l During steady-state operation while performing surveillance on HPCI Steam i

Line Delta P Flow Switch 2E41-N004, the high side micro-switch was found 1

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due to this event nor was safe plant oporrtion affected. This is a repet-l o,c ; l itive event as last reported on Reportabie Occurrence Number 50-366/1930-097.

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40 di 42 43 44 47 CAUSE DESCntPTION AND CORRECTIVE ACTloNS h 111011 The cause of this event has been attributed to sub-component (micro-switch) l 11 111 I failure. Th Barton Delta P Flow Meter (unit) was replaced and the hiqh l

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Unit I utilizes the same type of flow units.

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2 f1ARRATIVE REPORT Ceorgia Power Company Plant E. I. Ilatch Daxley, Georgia 31513 Reportable Occurrence Report No. 50-366/1980-112.

On July 23, 1980, with the mode switch in run while performing calibration of IIPCI Steam Line Delta P Flow Suitch 2E41-N004, the high side micro switch was found to be inoperative. Actuation should have been +190 inches 110 per Tech 2

9 Specs Limit, table 3.3.2-2. There were no effects upon public health and safety due to this event nor was safe plant operation affected.

This is a repetitive event as last reported on Reportable Occurrence Report No. 50-366/1980-097.

The cause of this event has been attributed to sub-component (micro-switch) failure.

The Darton Delta P Flow unit was replaced and the high and low micro-cwitch assembly was recalibrated and returned to service as per }lNP-2-5202.

No inherent problems were discovered dur~ing the generic review.

Unit I utilizes the scae type of flow units.