05000325/LER-1979-092-03, /03L-0:on 791204,during Normal Plant Operation, Operator Noticed Containment Atmospheric Monitor CAC-ATH-1263 Was Reading Downscale.Caused by Blown Power Supply Fuse & Shift in Instrument Zero.Fuse Replaced

/03L-0:on 791204,during Normal Plant Operation, Operator Noticed Containment Atmospheric Monitor CAC-ATH-1263 Was Reading Downscale.Caused by Blown Power Supply Fuse & Shift in Instrument Zero.Fuse Replaced

ML19256G153
Person / Time
Site:	Brunswick
Issue date:	12/20/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19256G146	List: 05000325/LER-1979-092, Forwards LER 79-092/03L-0 05000325/LER-1979-092-03, /03L-0:on 791204,during Normal Plant Operation, Operator Noticed Containment Atmospheric Monitor CAC-ATH-1263 Was Reading Downscale.Caused by Blown Power Supply Fuse & Shift in Instrument Zero.Fuse Replaced
References
LER-79-092-03L, LER-79-92-3L, NUDOCS 7912270528
Download: ML19256G153 (2)

LER-1979-092, /03L-0:on 791204,during Normal Plant Operation, Operator Noticed Containment Atmospheric Monitor CAC-ATH-1263 Was Reading Downscale.Caused by Blown Power Supply Fuse & Shift in Instrument Zero.Fuse Replaced

Event date:
Report date:
3251979092R03 - NRC Website

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8 60 61 DOCKET NUVBER 6d 69 EVENT OATE 74 15 REPORT DATE do EVENT DESCRIPTICN AND PROBABLE CONSEOUENCES h o

2 During normal plant operation, the onerator noticed that the containment atmospheric l monitor CAC-ATH-1263 was reading downscale.

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43 44 47 23 CAUSE CESCRIPTION ANC CCAPECTIVE ACT;CNS h l The power supply fuse was found blown and the instrument zero had shifted.

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LER CONTINUATION - Ro# l-79-92 Facility: BSEP Unit #1 Event Date:

12-4-79 assistance in determining the cause for the zero shifts,and engineering is eval-uating other systems to determine a qualified replacement for the system now in use, e

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