In this paper, the nuclear accident radioactive pollutants after the diffusion model are discussed, finally chooses to spread radioactive pollutants Gaussian model simulated research. At the same time, according to spread simulation analysis process in calculation and analysis process complex problems, an application example the ALOHA software comprehensive analysis of calculation and drawing, for public safety department quickly and effectively disposal of nuclear accident to have important theoretical guidance. However, the application software have some limitations, without considering the radioactive pollutants to the half-life of special properties, numerical simulation to bring not accuracy, in the next work will further improve.%对核电事故发生以后放射性污染物的扩散模式进行了讨论,最终选用高斯模型对放射性污染物扩散进行了模拟研究.同时,针对扩散模拟分析过程中存在计算和分析过程复杂的问题,实例应用了ALOHA软件进行综合分析计算与绘图,对于公共安全部门快速、有效地处置核事故具有重要的理论指导.然而,此应用软件也有一定的局限性,未考虑到放射性污染物特有的半衰期性质,给数值模拟带来了不准确性,在接下来工作中将进一步改进.
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