Title of article
Impurityconcentrationbehaviorsinaboilingtubesheetcrevice:PartII.PackedcreviceOriginalResearchArticle
Author/Authors
ChiBumBahn، نويسنده , , SiHyoungOh، نويسنده , , ByungGiPark، نويسنده , , IlSoonHwang، نويسنده , , InHyoungRhee، نويسنده , , UhChulKim، نويسنده , , JungWonNa، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2003
Pages
13
From page
145
To page
157
Abstract
Theimpurityconcentrationbehaviorofaboilingcrevicepackedwithmagnetiteparticleswasinvestigatedwiththermocouplesandelectrodesforthemeasurementoftemperatureandelectrochemicalcorrosionpotential(ECP),respectively,inordertounderstandchemicalchangeinapressurizedwaterreactor(PWR)steamgenerator(SG)crevice.Asecondarysolutioncomposedof50ppmNaand200ppbhydrogenwassuppliedataflowrateofabout4l/h.Sodiumhydroxide(NaOH)concentrationprocessinthecreviceandtheresultantboilingpointelevationbehaviorwerecharacterizedwithtemperatureandECPdata.Thetemperatureinthepackedcrevicewasabout2–3°Chigherthanthatfortheopencrevice.Inthesameconditions,themagnetite-packedcreviceshowedagreateramountofboilingpointelevationwithalongertimetoreachasteadystatecomparedwiththecaseofanopencrevice.Itwasfoundthatthebottomregionofthecrevicewasinitiallyfilledwithsteam,andthentheconcentratedliquidregioninitiallylocatedatthemiddleofcreviceexpandedtoboththecrevicebottomandtheupperregion.Toanalyticallyestimatethewettedlength,aclosedformmodelwasintroduced.Themodelresultsestimatedtheinitialwettedlengthshorterascomparedwiththemeasurementresults.MeasuredECPresultsofpackedcreviceshowedsimilarbehaviorsascomparedwithcalculatedresultsbyusingNernstequation.ECPresultsreasonablycoincidedwiththeboilingpointelevationestimatedfromthetemperaturedataexceptoneunusualcase.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2003
Journal title
Nuclear Engineering and Design Eslah
Record number
894603
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