05000368/LER-1980-083-03, /03L-0:on 801103,during Mode 1 Operation Sigma Indicators on Remote Shutdown Panel 2C80 Discovered Inoperable.Caused by Mechanically Stuck Indicator.Serva Motor Replaced & Indicator Calibr

/03L-0:on 801103,during Mode 1 Operation Sigma Indicators on Remote Shutdown Panel 2C80 Discovered Inoperable.Caused by Mechanically Stuck Indicator.Serva Motor Replaced & Indicator Calibr

ML19345B982
Person / Time
Site:	Arkansas Nuclear
Issue date:	11/25/1980
From:	Pendergraft R ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19345B980	List: 05000368/LER-1980-082-03, /03L-0:on 801030,during Mode 1 Operation Plant Computer Failed.Caused by Grounding Problems Due to Voltage Spikes.Welding Grounds Relocated & Computer Returned to Svc ML19345B979
References
LER-80-083-03L, LER-80-83-3L, NUDOCS 8012030643
Download: ML19345B982 (1)

LER-1980-083, /03L-0:on 801103,during Mode 1 Operation Sigma Indicators on Remote Shutdown Panel 2C80 Discovered Inoperable.Caused by Mechanically Stuck Indicator.Serva Motor Replaced & Indicator Calibr

Event date:
Report date:
3681980083R03 - NRC Website

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'N REPORT OATE AJ EVENT DESCRIPTION AND PROBABLE CONSECUENCES h 19121 I noring mode one operation while making routine operational tours the S/U,

io o i Ichannel reading (2JI-9000) and "B" S/G level (2LI-ll33) were found to be,

r o i41 l inoperable. Both of these instruments are Sigma indicators located on thg i o !s1 i remote shutdown panel 2C80.

Similar to LER 50-368/79-048.

This l o !s i t occurrence is reportable per Tech. Spec. 6.9.1.9b.

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The indicator was' freed and the instrument was calibrated.

rrrn 12LI-ll33 had a bad servo motor for the indicator.

The servo motor was i, i a l Ireplaced and' the indica tor calibra ted.

Replacement of sigma indicators ii n i lis under evaluation.

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