Numerical wind tunnel simulation of pollutant diffusion in coastal nuclear power plant
To assess the impact of nuclear power plants on the surrounding environment,a CFD numerical wind tunnel software is integrated,AutoCAD is used for pre-processing modeling,and Paraview software is used for post-processing analysis to study the migration and diffusion of pollutants in the atmosphere.The numerical wind tunnel software was evaluated using the IOP9 observation data from the 2003 joint field study in Oklahoma City.The results of the numerical wind tunnel and the IOP9 field experiment on the volume fraction of the downwind axis at the pollutant release source point and the wind field at the monitoring point were compared.The wind field comparison results show that the performance statistical index values were FAC5=FAC2=1,FB=-0.23,MG=0.75,ENMS=0.07,and SAA=11.9;The volume fraction comparison results show that FAC5=1.These statistical indicators are close to perfect values,which shows that the simulation results are in good agreement with the observed data.Taking a coastal nuclear power plant site as an object,the impact of pollutant diffusion in the atmosphere of nuclear power plants on the surrounding environment is studied.The results of numerical simulationshow that the pollutant volume fraction perpendicular to the incoming wind direction is generally Gaussian distribution,and the volume fraction will drop sharply at the ridge and other locations affected by the terrain.Finally,the volume fraction of numerical simulation was compared with the results ofwind tunnel experiments.The results show that the coincidence factor of comparison results at each vertical profile monitoring point was 10,and the coincidence factor of comparison results at each horizontal profile monitoring point was 3.5.The numerical simulation results are in good agreement with the wind tunnel test results.The numerical wind tunnel simulation results have a certain reference value and can be a convenient tool for pollutant diffusion simulation research in nuclear power plants when combined with field experiments and wind tunnel experiments.
environmental engineeringnuclear power plantCFDnumerical wind tunnel
NETL
NSTL
万方数据
维普
