05000324/LER-1980-065-03, /03L-0:on 800906,during Normal Startup,Containment Atmospheric monitor,2-CAC-AT-1259,discovered Not Running Due to Low Sample Flow Through Analyzer Units.Caused by Open Relay Contact in Monitor Photohelic Gauge

/03L-0:on 800906,during Normal Startup,Containment Atmospheric monitor,2-CAC-AT-1259,discovered Not Running Due to Low Sample Flow Through Analyzer Units.Caused by Open Relay Contact in Monitor Photohelic Gauge

ML19338F045
Person / Time
Site:	Brunswick
Issue date:	09/30/1980
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19338F039	List: 05000324/LER-1980-065, Forwards LER 80-065/03L-0 05000324/LER-1980-065-03, /03L-0:on 800906,during Normal Startup,Containment Atmospheric monitor,2-CAC-AT-1259,discovered Not Running Due to Low Sample Flow Through Analyzer Units.Caused by Open Relay Contact in Monitor Photohelic Gauge
References
LER-80-065-03L-01, LER-80-65-3L-1, NUDOCS 8010070449
Download: ML19338F045 (2)

LER-1980-065, /03L-0:on 800906,during Normal Startup,Containment Atmospheric monitor,2-CAC-AT-1259,discovered Not Running Due to Low Sample Flow Through Analyzer Units.Caused by Open Relay Contact in Monitor Photohelic Gauge

Event date:
Report date:
3241980065R03 - NRC Website

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U. S. NUCLEAM RE!ULATC".Y COMMISSION

RC FORM 366

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8 EVENT OESCRIPTION AND PROB ABLE CONSEQUENCES h ITTTl I During a normal reactor startup. it was discovered that the ennenfnmane nemannhat4r j

i ITTT1 I monitor, 2-CAC-AT-1259, would not run due to low sample flow through the analyzer ITTTl l units. This type monitor has a history of similiar problems involving sample flow.

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This event did not affect the health or safety of the public.

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS lilOll The low sample flow was caused by an open relav contact in the monitor photohelic I

Due to a lack of new photohelic gauges in stock a spare relav contact on the I i i i gauge.

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fiTT] I affected photohelic gauge was utilized to return the monitor to satisfactory gl The photohelic gauges on the other CAC monitors of both units were checked and found l I

mI operating satisfactorily.

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D LER ATTACHMENT - RO # 2-80-65 Facility: BSEP Unit No. 2 Event Date: 09-06-80 Presently all photohelic gauges on both units are checked quarterly for proper operation as per an approved plant procedure.

In addition, the CAC monitors on both units undergo periodic preventative maintenance every two weeks to ensure reliable operation. The failure of the photohelic gauge relay is attributed to normal end of life.

Due to a history of similar problems involving this type of analyzer, Engineering has written a plant modification to replace the monitors with more reliable monitors. The replacement equipment is scheduled to arrive in February 1981, and it will be installed during the first available outage following its receipt.

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