Title of article
Thermalhydrauliceffectoffuelplatesurfaceroughness
Author/Authors
DonnaPostGuillen، نويسنده , , TimothyS.Yoder، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
4
From page
2480
To page
2483
Abstract
Thisstudypresentssurfaceroughnessmeasurementscharacteristicofthepre-filmlayerappliedtoatypicalAdvancedTestReactor(ATR)fuelplate.ThisdataisusedtoestimatethefrictionfactorforthermalhydraulicflowcalculationsofaGasTestLoop(GTL)systemproposedforincorporationintoATRtoprovideafastneutronfluxenvironmentforthetestingofnuclearfuelsandmaterials.Toattaintherequiredneutronflux,thedesignincludesboosterfuelplatescladwiththesamealuminumalloyastheATRdriverfuelandcooledwithwatersuppliedbytheATRprimarycoolantpumps.Theobjectivesofthisstudyareto(1)determinethesurfaceroughnessoftheprotectiveboehmitelayerappliedtotheATRdriverfuelpriortoreactoroperationsinordertospecifythemachiningtolerancesforthesurfacefinishonsimulatedboosterfuelplatesinaGTLhydraulicflowtestmodeland(2)assesstheconsequentthermalhydraulicimpactduetosurfaceroughnessonthecoolabilityoftheboosterfuelwithasimilarpre-filmlayerapplied.Whilethemaximumroughnessofthiscoatingisspecifiedtobe1.6μm(63μin.),noprecisedataontheactualroughnesswereavailable.ArepresentativesamplecouponautoclavedwiththeATRdriverfueltoproducethepre-filmcoatingwasanalyzedusingopticalprofilometry.Measurementsyieldedameansurfaceroughnessof0.53μm(21μin.).Resultsfromasensitivitystudyshowthata±15%deviationfromthemeanmeasuredsurfacefinishwouldhaveaminimaleffectoncoolanttemperature,coolantflowrate,andfueltemperature.However,frictionallossesfromroughnessesgreaterthan1.5μm(∼60μin.)produceamarkeddecreaseinflowrate,causingfuelandcoolanttemperaturestorisesharply.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
895206
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