05000324/LER-1981-089-03, /03L-0:on 810817,primary Containment Atmospheric Oxygen Analyzer 2-CAC-AT-1263-2,Model F3M3 Found W/Drywell Oxygen Concentration High.Probably Caused by Instrument Drift.Analyzer Recalibr.Analyzers to Be Replaced

/03L-0:on 810817,primary Containment Atmospheric Oxygen Analyzer 2-CAC-AT-1263-2,Model F3M3 Found W/Drywell Oxygen Concentration High.Probably Caused by Instrument Drift.Analyzer Recalibr.Analyzers to Be Replaced

ML20010F131
Person / Time
Site:	Brunswick
Issue date:	08/31/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010F126	List: 05000324/LER-1981-089, Forwards LER 81-089/03L-0 05000324/LER-1981-089-03, /03L-0:on 810817,primary Containment Atmospheric Oxygen Analyzer 2-CAC-AT-1263-2,Model F3M3 Found W/Drywell Oxygen Concentration High.Probably Caused by Instrument Drift.Analyzer Recalibr.Analyzers to Be Replaced
References
LER-81-089-03L, LER-81-89-3L, NUDOCS 8109090403
Download: ML20010F131 (1)

LER-1981-089, /03L-0:on 810817,primary Containment Atmospheric Oxygen Analyzer 2-CAC-AT-1263-2,Model F3M3 Found W/Drywell Oxygen Concentration High.Probably Caused by Instrument Drift.Analyzer Recalibr.Analyzers to Be Replaced

Event date:
Report date:
3241981089R03 - NRC Website

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FIRC FOdM 366 U. S. NUCLEAR REGULATORY COMMISSION (7 77)

LICENSEE EVENT REPORT i

CONTROL BLOCK: l l

l l

l l lh (FLEASE PRINT OR TYPE alt. REQUIRED INFORMATION) 1 6

l Nl Cl Bl El Pl 2j@l 0 l Cl -l 6 l 0 ! 0 l 0 l 0 ! - l 0 l 0 l@l 4 l 1 l 1 l 1 l 1 l@l l

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8 9 LICENSEE CODE 14 lb LICENSE NUMBEM 25 26 LICENSE TYPE JO 57 CAT 58 l CON'T lloltl ggy l L@Lol 51 ol -l ol 312141@l o l 8 I 1171811 C1018131118J1J@

P 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 l_ i EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES h 1012 l l During plant operation, routine surveillance revealed that primarv containment l

) at:nospheric oxygen analyzer, 2-CAC-AT-1263-2, Model No. F3M3, was giving indication l

lO l3 l l l 0 l4 l l of drywell oxygen concentration that was 1.5% higher than the indication shown by the l l0lsl l other primary containment atmospheric oxygen analyzer, 2-CAC-Ar-1259-2.

Thig event l

[9 l6 l l did not affect the health and safety of the public.

l l0 l7j l I

1O Ia l 1 Technical Specification 3.3.5.3, 3.6.6.4. 6.9.1.9b i

80 7

8 9 SYSTEM

CAUSE

CAUSE COMP.

VALVE COJY CODF SU8 CODE COMPONENT CODE 5UBCODE SUBCODE l Sl El@ Wh Wh lI lN lS lT lR lU lh W@ [_Z,j h O 9 7

8 9

10 11 12 13 18 19 20 SEQUENTIAL oCCU7,RE NCE REPORT REVISION LE R,Ro EVENT YE AR REPC NT NO.

CODE TYPE NO.

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CAUSE DESCRIPTION AND CORREcllVE ACTIONS 27

! l 1 l o l l A calibration check of both analyzers revaled that the 1259-2 analyzer was operating l l

l properly and the 1263-2 analyzer was out of calibration, apparently due to instrument I t

i i

,, l drift. The analyzer was recalibrated and was returned to service.

Due to a history I

D TT1 I of similar instrument drif t and moisture-related problems, a plant modification has I

l been developed to replace these analyzers with others of a more reliable design.

I i 4 7

8 9 80 STA S

% POWER OTHER STATUS DIS O RY DISCOVERY DESCRIPTION il M dh l 0l 8 l 2 l@l NA l

l A l@l Operator Surveillance l

ACTIVITY CONTENT RELE ASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELTASE l 1 l 6 l d h (,J_}hl NA l

l NA l

7 8 9 10 tt 44 45 80 l

PER50NNEL EXPOSURES I

NOV8 E tt TYPE 39 I l 1 l 7 l l 0l O! 0lhdhl DESCRIPTION l

NA PERSONNEL.NJU IES l

NUMBER

DESCRIPTION

LLlaJ LoLeLd@l NA I

7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILtTY Q TYPE DE SCRIPTION v

(Jf._jh! NA l

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M. J. Pastva, Jr.

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NAME OF PREPAHER