05000321/LER-1980-014-03, /03L-0:on 800130,during Steady State power,hi-low Flow Reactor Bldg Vent Stack Radiation Monitor Annunciator Alarm Occurred Because Gas Sample Flow Had Stopped.Caused by Solenoid Valve Stuck in Closed Position

/03L-0:on 800130,during Steady State power,hi-low Flow Reactor Bldg Vent Stack Radiation Monitor Annunciator Alarm Occurred Because Gas Sample Flow Had Stopped.Caused by Solenoid Valve Stuck in Closed Position

ML19296D186
Person / Time
Site:	Hatch
Issue date:	02/18/1980
From:	Rogers W GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19296D182	List: 05000321/LER-1980-014, Forwards LER 80-014/03L-0 05000321/LER-1980-014-03, /03L-0:on 800130,during Steady State power,hi-low Flow Reactor Bldg Vent Stack Radiation Monitor Annunciator Alarm Occurred Because Gas Sample Flow Had Stopped.Caused by Solenoid Valve Stuck in Closed Position
References
LER-80-014-03L, LER-80-14-3L, NUDOCS 8002290453
Download: ML19296D186 (2)

LER-1980-014, /03L-0:on 800130,during Steady State power,hi-low Flow Reactor Bldg Vent Stack Radiation Monitor Annunciator Alarm Occurred Because Gas Sample Flow Had Stopped.Caused by Solenoid Valve Stuck in Closed Position

Event date:
Report date:
3211980014R03 - NRC Website

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Vent Stack Radiation Fonitor annunciator alarm occurred.

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stack effluent gas.

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l iMRRATIVE REPORT l

Georgia Power Co.npany Plant E.

I. Hatch Baxley, Georgia 31513 Reportable Occurrence Report l10. 50-321/1980-014 j

During steady state power operation at 2385 t'Wt, a Hi-Low flow Reactor i

Building Vent Stack Radiation Monitor annunciator alann occurred.

An investigation revealed that the gas sample flow to the Reactor Duilding l

Vent Stack Radiation lbnitors had stopped rendering the n;onitors inoper-i able.

E. T. S. Section 2.1. 4. b wa r. complied with by obtaining and analyzing a grab sample of the reactor building vent stack effluent gas.

I The cause was determined to bn a solenoid valve stuck in the closed position.

This vclve is used for purging the radiation monitor when f

performing a rianitor theck sour ce calibration.

The valve was replaced and the monitors returnad to service within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

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This type solenoid valve is cox.an to other gasc ous ef flunnt sampling systems witFin the plant.

Hov;ewr, since this is the first valve to i

f ail, the failure rate is not such that a generic proble.r, is evident.

i lhere were no effects upon the public health and sa f ety due to this i

event.

This is a non-repetitive event. for this systen.

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