05000366/LER-1980-017-03, /03L-0:on 800219,during Instrument Check,B Drywell Dihydrogen Dioxide Recorder Found Reading Low.Caused by Diaphragm Failure in B Analyzer Vacuum Pump.Diaphragms Replaced.Analyzer Recalibr & Returned to Svc

/03L-0:on 800219,during Instrument Check,B Drywell Dihydrogen Dioxide Recorder Found Reading Low.Caused by Diaphragm Failure in B Analyzer Vacuum Pump.Diaphragms Replaced.Analyzer Recalibr & Returned to Svc

ML19305D729
Person / Time
Site:	Hatch
Issue date:	03/13/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19305D724	List: 05000366/LER-1980-017, Forwards LER 80-017/03L-0 05000366/LER-1980-017-03, /03L-0:on 800219,during Instrument Check,B Drywell Dihydrogen Dioxide Recorder Found Reading Low.Caused by Diaphragm Failure in B Analyzer Vacuum Pump.Diaphragms Replaced.Analyzer Recalibr & Returned to Svc
References
LER-80-017-03L-01, LER-80-17-3L-1, NUDOCS 8004150460
Download: ML19305D729 (2)

LER-1980-017, /03L-0:on 800219,during Instrument Check,B Drywell Dihydrogen Dioxide Recorder Found Reading Low.Caused by Diaphragm Failure in B Analyzer Vacuum Pump.Diaphragms Replaced.Analyzer Recalibr & Returned to Svc

Event date:
Report date:
3661980017R03 - NRC Website

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80 61 DOCKET NUMSER 88 88 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROS ABLE CONSEQUENCES h f

l'o'TT1 l During an instrument check. the "B" Drvve11 H2 - 02 recorder was found l

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reading low. An investigation revealed a failure of the vacuum pump l

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L ITTTl i Reportable Occurrence No. 50-366/1979-104.

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NARRATIVE

REPORT Ceorgia Power Company Plant E. I. Hatch Baxley, Georgia 31513 Reportable Occurrence Report No. 50-366/1980-017.

While doing an instrument check, the "B" Drywell H2 - 02 Analyzer Recorder was found reading low.

In investigating the low recorder reading, it was discovered that the vacuum pump for the "B" analyzer was not working.

Therefore, the "B" analyzer was declared inoperable. However the "A" analyzer was operable.

The reactor was at steady state operation. The operation of the plant was not affected. There were no effects upon public health and safety due to this event. The failure of the analyzers is a repetitive event as last reported on Reportable Occurrence Report No. 50-366/1979-104.

The cause of this occurrence has been attributed to diaphragm failure in the vacuum pump of the "B" analyzer.

The diaphragms were replaced and the analyzer was calibrated and placed into service. Unit II is the only unit that utilizes this type of analyzer, Comsip Delphi Model K-4.

The instrument failure review did not indicate that there are any generic problems with these diaphragms. The past failures were due to hydrogen cell failures.

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