05000325/LER-1979-090-03, /03L-0:on 791027,shift in Output Occurred in Atmospheric Monitor 1-CAC-1263-3.Caused by Intermittent Failings of Magnetic Amplifier.Amplifier Replaced & Monitor Returned to Svc

/03L-0:on 791027,shift in Output Occurred in Atmospheric Monitor 1-CAC-1263-3.Caused by Intermittent Failings of Magnetic Amplifier.Amplifier Replaced & Monitor Returned to Svc

ML19210D264
Person / Time
Site:	Brunswick
Issue date:	11/21/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19210D261	List: 05000325/LER-1979-090, Forwards LER 79-090/03L-0 05000325/LER-1979-090-03, /03L-0:on 791027,shift in Output Occurred in Atmospheric Monitor 1-CAC-1263-3.Caused by Intermittent Failings of Magnetic Amplifier.Amplifier Replaced & Monitor Returned to Svc
References
LER-79-090-03L, LER-79-90-3L, NUDOCS 7911260210
Download: ML19210D264 (2)

LER-1979-090, /03L-0:on 791027,shift in Output Occurred in Atmospheric Monitor 1-CAC-1263-3.Caused by Intermittent Failings of Magnetic Amplifier.Amplifier Replaced & Monitor Returned to Svc

Event date:
Report date:
3251979090R03 - NRC Website

text

NRC FORM 366 U. S NUCLEAR REGULATORY COMMISSION (7 77),.

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LICENSEE EVENT REPORT CONTROL BLOCK: l l

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3 60 61 OOCKET NUMBER 66 69 EVENT OATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h O

2 l During normal operation, the operator noticed that the containment O

3 l atmospheric monitor 1-CAC-1263-2 had an unexplained shif t in its output.

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[ An investigation determined that the mannetic amolifier was failine intermittent 1v. I 1

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dryers were installed on these instruments two years ago, the problems with the I

gl magnetic amplifiers have been significantly reduced. Due to the problems being l

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LER CONTINUATION - RO# 1-79-90 Facility: BSEP Unit No. 1 Event Date:

10-27-79 instrumentation to replace that now in use.

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