05000325/LER-1979-057-03, /03L-0:on 790926,containment Atmospheric Monitor Found Erratic.Cause Unknown.Instrument Calibr & Returned to Svc.Investigation Underway to Determine Best Replacement Sys

/03L-0:on 790926,containment Atmospheric Monitor Found Erratic.Cause Unknown.Instrument Calibr & Returned to Svc.Investigation Underway to Determine Best Replacement Sys

ML19262A504
Person / Time
Site:	Brunswick
Issue date:	10/25/1979
From:	Tollison A CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19262A503	List: 05000325/LER-1979-057, Forwards LER 79-057/03L-0 05000325/LER-1979-057-03, /03L-0:on 790926,containment Atmospheric Monitor Found Erratic.Cause Unknown.Instrument Calibr & Returned to Svc.Investigation Underway to Determine Best Replacement Sys
References
LER-79-057-03L, LER-79-57-3L, NUDOCS 7910310391
Download: ML19262A504 (1)

LER-1979-057, /03L-0:on 790926,containment Atmospheric Monitor Found Erratic.Cause Unknown.Instrument Calibr & Returned to Svc.Investigation Underway to Determine Best Replacement Sys

Event date:
Report date:
3251979057R03 - NRC Website

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LICENSEE EVENT REPORT

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60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o

2 lDuring normal plant operation. the operator noticed that the containment atmospheric lo la i monitor CAC-AT-1263 was erratic. The same indication occurred on October 2, 1979 l

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40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i

o lIn both instances, the zero reference had shifted upscale. The instrument was cali-l 1

i brated both times and returned to service. Engineering is now investicating other I

f7TTl Isystems to determine the best replacement for our system, which has a history of l

lil3l l calibration problems.

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% POWER OTHER STA TUS ISCO RY DISCOVERY DESCRIPTION y@ l 0 9 l 4 l@l NA l

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80 LOSS OF OR DAMAGE TO FACILITY TYPE D E SCRIP TION Lu2J Lz_J@l NA l

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8 9 to 68 69 80 5 NAME Or PREPARER PHONE-