拉格朗日法模拟华东核电厂^(137)Cs大气扩散特征影响因子

Impact factors Analysis of ^(137)Cs Atmosphere Dispersion from Huadong Nuclear Power Plant Basing on Lagrange Method

用拉格朗日法模拟了不同因子对核电厂^(137)Cs大气扩散特征的影响。对华东核电厂在建筑物影响、粒子释放率和释放高度不同参数设置情景下^(137)Cs大气扩散时空分布特征进行模拟。结果表明:考虑建筑物时核电厂80 km范围核素浓度是不考虑建筑物情景的1.0倍。释放高度为65 m时,^(137)Cs浓度是80 m处的1.2倍。粒子释放率对放射性核素浓度的影响甚微。在研究区域尺度核素大气扩散特征时,应重点关注建筑物和释放高度的影响。

This study aims at identifying the effects of different impact factors on radionuclide dispersion discharging from nuclear power plant based on Lagrange simulation method of atmosphere atmosphere dispersion. LASAT software is used to simulate atmosphere dispersion characters of radionuclide of Huadong nuclear power plant under different parameters setting scenarios including different building setting, particle release rate and release height scenarios. It is shown that the radionuclide concentration of 137Cs with building setting is 1.0 times that without building setting. The radionuclide concentration of 137Cs in the 80 km region range under release height being 65 m（H--65）is 1.2 times than that being 80 re（H= 80）. The effect of release rate of particle on radionuclide concentration is not obvious. When radionuclide atmosphere dispersion characters in region is studied, more attention should be paid to the effect of building and release height on radionuclide atmosphere dispersion.