Title of article
ACFDapproachtotheatmosphericdispersionofradionuclidesinthevicinityofNPPsOriginalResearchArticle
Author/Authors
PauloA.B.deSampaio، نويسنده , , MiltonA.G.Junior، نويسنده , , CelsoM.F.Lapa، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
24
From page
250
To page
273
Abstract
MoststudiesofatmosphericdispersionofradionuclidesreleasedfromNuclearPowerPlants(NPPs)arebasedonGaussianplumemodelsorontheuseofaconvection–diffusionequation.Suchmethods,whichdonotinvolvesolvingtheflowproblem,areusefulintheatmosphericmesoscale,oftheorderof2–2000kmfromtheNPP.However,theydonotaccountfortheturbulencegeneratedbytheinteractionofthewindwithobstaclesandwiththereleasedmaterialstream,whicharethedominantfactorsinthelocalscale,oftheorderof0–2kmfromthesourceofemission.Here,theauthorsadvocatetheuseofcomputationalfluiddynamics(CFD)tostudythedispersionproblem.ThephysicalmodelcomprisestheNavier–Stokesequations,aconvection–diffusionenergyequation,andtransportequationsfortheradionuclides.Thepaperdetailsthestabilizedfiniteelementformulationused,stressingitsconnectionwiththevariationalmultiscale/largeeddysimulationapproach.Adaptivetechniquescombiningerrorestimationandremeshingarealsoemployed.ThemethodisimplementedonaBeowulfparallelcomputingsystemusingdomaindecompositionandthemessagepassinginterface(MPI).Controlledemissionsfromachimneyandreleasefromsevereaccidentshavebeensimulated,showingtheimportanceofthelocalphenomenaonthedispersionproblem.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
894999
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