05000325/LER-1982-106-03, /03L-0:on 821026,primary Containment Oxygen Analyzer 1-CAC-AT-1263-2 Indicated Drywell Oxygen Concentration 3% Less than Indicated by Redundant Analyzer 1-CAC-AT-1259.Caused by Instrument Output Shift

/03L-0:on 821026,primary Containment Oxygen Analyzer 1-CAC-AT-1263-2 Indicated Drywell Oxygen Concentration 3% Less than Indicated by Redundant Analyzer 1-CAC-AT-1259.Caused by Instrument Output Shift

ML20028B856
Person / Time
Site:	Brunswick
Issue date:	11/24/1982
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20028B851	List: 05000325/LER-1982-106, Forwards LER 82-106/03L-0 05000325/LER-1982-106-03, /03L-0:on 821026,primary Containment Oxygen Analyzer 1-CAC-AT-1263-2 Indicated Drywell Oxygen Concentration 3% Less than Indicated by Redundant Analyzer 1-CAC-AT-1259.Caused by Instrument Output Shift
References
LER-82-106-03L-01, LER-82-106-3L-1, NUDOCS 8212070118
Download: ML20028B856 (1)

LER-1982-106, /03L-0:on 821026,primary Containment Oxygen Analyzer 1-CAC-AT-1263-2 Indicated Drywell Oxygen Concentration 3% Less than Indicated by Redundant Analyzer 1-CAC-AT-1259.Caused by Instrument Output Shift

Event date:
Report date:
3251982106R03 - NRC Website

text

NRC FORM 366 U. S. NUCLE A*1 REGULATORY COMMISSION (7 77)

LICENSEE EVENT REPORT A

CONT HOL BLOCK: l l

l l

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lh (PLEASE PRINT CR TYPE ALL REQUIRED INFORMATION) 1 6

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7 8 9 LICENSEE CODE 14 15 LICENSE NUMBEM 25 26 LICENSE TYPE JO 67 LAT 68 CON'T 10111 E iC l L hl Ol 5 l 0l -l 013 l 2 l 5 @l 1 l 012 l 6 l 812 l@l 1l1 l 2l 4l 8 l 2 l@

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60 61 DOCKET NUMBER 6b 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h O 2 l During plant operation, routine surveillance revealed that primary containment or.ynen l 10 l 3 l l analyzer, 1-CAC-AT-1263-2, indicated a drywell oxygen concentration which was 3% less l j

l than was indicated by redundant analyzer 1-CAC-AT-1259.

On 10-27-82 the 1263-2 l

O 4 Iolsll analyzer tripped and wouldn't restart. Neither event affected the health and safety l O o l of the public.

l o 2 l

Technical Specifications 3.3.5.3, 3.6.6.4, 6.9.1.9b l

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40 41 42 43 44 47 CAUSE DESCHIPTION AND CORRECTIVE ACTIONS h

> o l The 10-26-82 event resulted from an instrument Outnut shift in the 1263-2 analyzer I

i i 1 electromagnetic unit.

The analyrer was calibrated and returned to service. The l

l10-27-82 event resulted from a blown 1263-2 analyzer control power fuse.

The fuse wasl

, 7 l replaced and the monitor was returned to service. These CAC analyzers, Model No. F3M3L i 3 l will be replaced by an approved plant modification.

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% POWE R OTHER STATUS ISC R

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8 9 to II 44 45 80 PEHSONNEL EXPOSUHES NUMBEH TYPE DESCHIPTION NA l

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