Title of article
PredictionoftheperformanceofanionchamberamplifierunderγradiationOriginalResearchArticle
Author/Authors
VivekAgarwal، نويسنده , , Sundarsingh، نويسنده , , V.Ramachandran، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2005
Pages
15
From page
1373
To page
1387
Abstract
Theionchamberamplifier(ICA)playsamajorroleintheproperfunctioningofanuclearreactorasitmonitorstheradiationsfromthenuclearreactorbymeasuringtheionicactivityinsidetheionchamber.ThesignalconditioningcircuitryoftheICAdetectsandconditionstheweakioniccurrentscomingfromtheionchamberdome.DegradationintheperformanceofthesemiconductordevicesusedinthispartoftheICA,canleadtoinaccuratemonitoringofthereactoroperation,resultinginapossiblecatastropheduetomalfunction.Further,theresponseoftheICAunderirradiationalsodependsuponthestrengthoftheinputsignal(ionic)currentitisrequiredtohandle.TheactivedevicesusedintheICAunderstudyareoperationalamplifiers(Op-Amps)suchasDN8500AandOPA111,instrumentationamplifierINA101,transistor2N2920Aandavoltagereferencedevice,AD584.Sincethesedevicesmaybesensitivetoradiation,onemustknowtheirradiationbehavioursothattheperformanceoftheICAcanbepredicted.ThispaperexaminestheperformanceoftheICAbycharacterisingtheradiationprofilesofitsvitalcomponents,viz.theOp-Amps,instrumentationamplifiers,transistors,etc.bymonitoringtheirparametricchangeson-line,i.e.whenthesourceison,andthedevicesarebiased.ThesimulationrunsinvolvethesimulationoftheentireICAcircuitryusingthechangedvaluesofthevitalparameterssuchasinputbiascurrentandinputoffsetvoltage.ThemainadvantageofthismethodisthatitobviatesirradiatingthewholeICAcircuittostudyitsirradiationperformance,andsimulatesanenvironmentofradiationleakagearoundtheICA.Basedonthisstudy,resultsarepresentedtopredicttheperformanceoftheICA.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2005
Journal title
Nuclear Engineering and Design Eslah
Record number
894931
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