放射性核素大气扩散程序SDUG的开发与初步验证  

Development and Preliminary Verification of Atmospheric Dispersion Code SDUG of Radionuclide

作　　者：曹博[1] 杨晔[1] 陈义学[1] 

机构地区：[1]华北电力大学核科学与工程学院,北京102206

出　　处：《原子能科学技术》2013年第B12期472-476,共5页Atomic Energy Science and Technology

基　　金：国家重大专项子课题资助项目(2011ZX06004-008);中央高校基本科研业务费专项资金资助项目(12MS61);北京市高等学校青年英才计划资助项目(YETP0717)

摘　　要：放射性核素大气扩散过程模拟是进行核事故后果评价和应急决策的主要内容之一。高斯烟羽模式计算方法简单便捷,在核事故放射性核素释放的后果评价中获得了广泛应用。本工作在高斯烟羽模式的基础上,考虑了核素粒子的重力沉降、雨洗作用以及放射性衰变等因素的影响,开发了放射性核素大气扩散程序SDUG。该程序可计算正常工况和事故工况下,连续点源和瞬时点源在不同气象和地形条件下的放射性核素浓度分布。通过与参考程序的数值结果比较发现,SDUG程序计算结果符合较好,能满足早期核应急和后果评价的需要。Simulation of atmospheric dispersion of radionuclides is one of the main contents of radioactive consequence assessment and emergency decision to nuclear accidents. Gaussian plume model is simple and convenient, and it has been applied widely for assessing the radioactive consequence of nuclear accidents. The atmospheric dispersion code SDUG of radionuclides was developed based on the Gaussian plume model considering gravitational settling of particles, rain washing and the decay of radioactive species. The SDUG can calculate the radionuclide concentration distribution in different meteorological and topographical situations for instantaneous and continuous point sources under normal and accident conditions. The results of SDUG are in good agreement with the reference code values and can meet the requirements for early nuclear emergency and consequence assessment.

关 键 词：SDUG 高斯烟羽模式 放射性核素 大气扩散 

分 类 号：TL732[核科学技术—辐射防护及环境保护]