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Impactassessmentofthermal - dischargefrom powerplantsbasedoncombinationof
numericalsimulationandprototypeobservation
CHENXiaoli,DUANYafei,ZHAOYijun,JIPing,YUANJue
(DepartmentofHydraulics,ChinaInstituteofWaterResourcesandHydropowerResearch,Beijing 100038,China)
Abstract:Separationofthenaturalinhomogeneousbackgroundfromtheobservedtemperaturefieldiscrucialinthe
postevaluationofthermaldischargeimpact.Inthispaper ,aheattransportmodel,basedonthemultiplenested
gridtechnology,isconstructedtosimulatetheseawatertemperaturevariationincrossscalesunderthecombined
actionofthehydrologicandatmosphericfactors.Combinedwiththetide ,current,andremoteseasurfacetemper
aturedata ,amethodisproposedtoextractthethermaldischargeimpactfrom theinhomogeneousbackgroundand
appliedtothepostevaluationofthermalimpactofacoastalnuclearpowerplant.Theproposedmodelandevalua
tionmethodshowgoodperformanceindescribingthecharacteristicsofthethermalplumeandthenaturalback
groundhigh - temperaturemassdrivenbythecomplexmarineandmeteorologicaldynamics.Thenearshoreback
groundtemperatureshowsasimilartemporalandspatialvariationrangewiththe1℃ temperaturerisingareacaused
bythethermaldischarge.Theinhomogeneityofthebackgroundshouldbefullyconsideredintheassessmentsofthe
thermaldischargeinthe1℃ risingscale.Theproposedsimulationandevaluationmethodcansupporteco - environ
mentalimpactassessmentsofthermaldischargefromthermalpowerplantsundercomplexenvironmentalconditions.
Keywords:coolingwater;numericalsimulation;backgroundtemperature;transportanddiffusion;postevalua
tion
(责任编辑:李福田)
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