05000324/LER-1981-038-03, /03L-0:on 810302,primary Containment Atmospheric Monitor Oxygen Analyzer Observed Showing Downscale Indication of Drywell Oxygen Concentration While Other Oxygen Analyzer Indicated Expected Concentration

/03L-0:on 810302,primary Containment Atmospheric Monitor Oxygen Analyzer Observed Showing Downscale Indication of Drywell Oxygen Concentration While Other Oxygen Analyzer Indicated Expected Concentration

ML19345G554
Person / Time
Site:	Brunswick
Issue date:	03/31/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19345G551	List: 05000324/LER-1981-038, Forwards LER 81-038/03L-0 05000324/LER-1981-038-03, /03L-0:on 810302,primary Containment Atmospheric Monitor Oxygen Analyzer Observed Showing Downscale Indication of Drywell Oxygen Concentration While Other Oxygen Analyzer Indicated Expected Concentration
References
LER-81-038-03L-01, LER-81-38-3L-1, NUDOCS 8104070517
Download: ML19345G554 (2)

LER-1981-038, /03L-0:on 810302,primary Containment Atmospheric Monitor Oxygen Analyzer Observed Showing Downscale Indication of Drywell Oxygen Concentration While Other Oxygen Analyzer Indicated Expected Concentration

Event date:
Report date:
3241981038R03 - NRC Website

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60 61 DOCK ET NUM8 ER 68 69 EVENT QATE 74 75 REPORT OATE 80 EVENT DESCRIPTION AND PROSABLE CONSEQUENCES h lDuring normal plant operation, the primary containment atmospheric monitor oxygen j

o 2 [b TT1 l analyzer, 2-CAC-ATH-1259-2, was observed showing a downscale indication of the drywelig g i oxygen concentration while the other oxygen analyzer, 2-CAC-ATH-1263-2, indicated the l TbTTI I expected concentration. This event di! not affect the health or safety of the public.;

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'o LER A'ITACHMENT - RO #2-81-38 Facility: BSEP Unit No. 2 Event Date: March 2,1981 i'

This event occurred as a result of moisture buildup in the sample line air-dryer of the 1259 monitor. As presently designed, the sample piping configuration permits excess moisture to build up in the piping. This excess coisture then accumulates in the monitor air-dryer and if not removed causes decreased sample flow to the monitor and resultant monitor indication problems. Due to a history of similar events involving moisture problems, a plant modification has been developed to replace these monitors with others of a more reliable design. The sample piping to these monitors will also be modified to help remove.'the moisture problem of the monitored sample.

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