辐射防护2012，Vol.32Issue(3)：134-139,6.
内陆代表性厂址事故扩散因子不同估算方法的比较
Comparison of Different Estimation Methods of Accident Atmospheric Dispersion Factors for a Representative Inland Nuclear Power Plant
摘要
Abstract
The applicability of atmospheric diffusion models in complex terrains and low wind speed conditions was discussed in this paper. The accident atmospheric dispersion factors （ATFs） of Taohuajiang nuclear power plant were calculated by using two methods： the probabilistic method recommended by the U.S. Nuclear Regulatory Commission （NRC） and the three dimensional objective diagnostic wind field model coupled with Lagrangian trajectory puff model to simulate the 8 760 hourly emissions of radioactive nuclides. The results indicate that the maximum hourly accident ATFs calculated by the probabilistic method are conservative in exclusion area boundary （EAB） . However, in some directions, accident ATFs calculated using probabilistic method is smaller than that using Lagrangian puff model, as well as some accident ATFs in remote sectors are larger than those in close sectors. Moreover, results calculated by probabilistic method are smaller in long-term release situation. Therefore, accident ATFs obtained according to the regulatory guides may not conservative in some cases, and atmospheric diffusion model should be selected carefully when a nuclear plant is located at a site with complex environmental conditions.关键词
事故扩散因子/Lagrangian烟团模型/小静风/复杂地形Key words
accident atmospheric dispersion factors/lagrangian puff model/calm/complex terrains分类
资源环境引用本文复制引用
范丹,郝宏伟,姚仁太,乔清党,段皓..内陆代表性厂址事故扩散因子不同估算方法的比较[J].辐射防护,2012,32(3):134-139,6.基金项目
国家自然科学基金资助项目（11175161）. （）
