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| {{Adams
| | #REDIRECT [[05000324/LER-1981-026-03, /03L-0:on 810220,primary Containment Atmospheric Monitor Oxygen Analyzer 2-CAC-ATH-1259-2 Falsely Indicated Low Drywell Oxygen Concentration.Caused by Defective Photohelic Gauge.Gauge Replaced]] |
| | number = ML20003D569
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| | issue date = 03/20/1981
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| | title = LER 81-026/03L-0:on 810220,primary Containment Atmospheric Monitor Oxygen Analyzer 2-CAC-ATH-1259-2 Falsely Indicated Low Drywell Oxygen Concentration.Caused by Defective Photohelic Gauge.Gauge Replaced
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| | author name = Pastva M
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| | author affiliation = CAROLINA POWER & LIGHT CO.
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| | addressee name =
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| | addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
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| | docket = 05000324
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| | license number =
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| | contact person =
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| | document report number = LER-81-026-03L, LER-81-26-3L, NUDOCS 8103270674
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| | package number = ML20003D565
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| | document type = LICENSEE EVENT REPORT (SEE ALSO AO,RO), TEXT-SAFETY REPORT
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| | page count = 2
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| }}
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| =Text=
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| {{#Wiki_filter:c=. .
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| LICENSEE EVENT REPDHI (PLEASE PRINT CR TYPE ALL REQUIRED INFORMATION) 4 couTr.ot stoCx: l i
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| [o iT} l N l C l B l E l P l 2 l@l 0 l 0 l- l 0 l 0 l 0 l 0 l 0 l- l 025 l 026l@lLICkNSE 4 l1 l1 TYPE l141 JO l@j 57 GA T ks l@
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| 84 13 LsCENsE NUMDEM
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| '7 8 9 LICENSEE Coot CON'T .
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| o 1 EyYeE l L @l 0 l 5 l 0 l- l 0 l 364l 269l 4 j@l EVENT oATE 0 l 2 l 2 l 0 l 8 lREPORT 74 7% 1 l@l OAT E 0 l 3 80 ( 2 l 0 l 8 l
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| ,7 8 60 Gl ooCKET NuvutM EVENT DESCRIPTION AND PROSABLE CONSEQUENCES h i
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| .4 2 l During a normal reactor startup with the drvwell do-inerted, the primarv containment o l atmospheric monitor oxygen analyzer' 2-CAC-ATH-1259-2 indicated a drywell ox" gen con- I I
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| g Icentration of 16.5% while the other primary containment atmospheric monitor _oxvgen This l g l analyzer, 2-CAC-ATH-1263-2 indicated the actual oxygen concentration of 19.5%.
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| l 0 6 1 event did not affect the health or safety of the public.
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| * o 7 I l
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| i Technical Specifications 3.3.5.3, 6.9.1.9b 80 o
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| 1 89 *
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| " suBCo'o'E s of
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| 'EE Yo$I ssCi5E COMPONENT CooE Q l Sl E j@ W@ W@ II lN lS lT lR lU l@ l Cl@ W @ 13 18 19 20 i 8 9 to 13 12 OCCUR RENCE REPORT Revision stouENTIAL TYPE No.
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| REPORT No. Cood W
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| LER
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| @ , reg'Ro g EVENT YE AR g 10 l2 l6 l y* lo l3 l n
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| ltl M 31
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| [oj 22
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| _ l28 8l22 1l M 24 26 21 3
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| : 8. MANUF L RER P NT MET hours 22 s8 i FoR sVPPL1 AEE A Q lZl@' lM Zl@ l0l0l0l0l y@ l42Yl@ l43Nl@ lBl1l3[5l@
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| IX 34 l@ 3s J1 40 48 u 47 CAUSE OESCRIPTION AND CORRECTIVE ACTIONS 1 o l A defective photohelic gauge in the 1259-2 analyzer caused the monitor to f alselv indi1-l
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| @ lcate a low drywell oxTaen concentration. Fo11 ovine the renincement of the !?59 9 found within tolernnee f g ]photchelic gauge, both monitors were checked for calibration.
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| exvgen concentration. I
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| @ l and were returned to service indicatin"z the correct I
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| l i A I 80
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| -i S s s power oTwERsTATus bEsEoNRv' oiscovERv otsCR PTroN @
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| 'sY2E Operator ' Surveillance l l" Al@L NA l f i 5 W @ l0l0l0l@l '* " " **
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| l e4 TEw LOCATION oP RELEASE @
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| l W
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| t a RELEASED @oP RELEASE AMoUNToP [Z,,,j@lNA ACTIVITY l NA @ l l
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| PERSONNEL ExPosVEEs NuMeE R TYPE oEsCRiPrioN @ NA l i 7 l 010 l O l@[, Zj@l "
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| ' ER , o El'imV4Es NUweeR oEsCRiPrioN@ EA l i R 8 9 l 0l 010l@l 11 12 80 7
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| Loss of on D'AuAGE To FACILITY TYPE oEsCRIPTroN l NA i 9
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| [JJ@li, **
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| RIPTION n i IIIIIIII1III12 1ssU]E LN, l @oE "" "'I 10 b 27'D W M. J.
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| NAME OP PniEPAHER Pastva, Jr.
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| PHONE:
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| (919) 457-9521 s,
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| .=
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| LER ATTACHMENT - RO #2-81-26 Facility: BSEP Unit No. 2 Event Date: 2-20-81 This event occurred when the 1259-2 analyzer photohelic gauge failed causing the analyzer monitor to indicate a drywell oxygen concentration that was 3*. less than the actual concentration. During the investigation of this event plant Maintenance examined the failed gauge and determined it had failed as a result of excess moisture in the sample flow. As presently designed, these monitors encounter significant moisture in their sample flow due to the design of the piping configuration to the monitors. Due to a history of sin ilar events involving moisture problems, a plant modification has been developed to replace-these monitors with others of a more reliable design. The sacple piping will also be modified to help remove the moisture problem of the monitored sample.
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