核电厂事故核素扩散有效剂量影响因子模拟研究

Simulation Analysis of Effect of Impact Factor on Effective Dose of Radionuclide Atmosphere Dispersion From Nuclear Power Plant Accident

介绍了核电厂事故后果评价影响因素模拟分析方法,以某内陆核电厂址为研究对象,应用核电厂事故后果计算程序模拟了不同扩散参数和源项变化情景下核电厂事故短期大气弥散因子和有效剂量对其响应特征。结果表明,水平扩散参数情景下短期大气弥散因子的最大值发生频率相对于垂直扩散参数情景较低,有效剂量最大值发生频率源项情景远高于扩散参数情景,有效剂量对扩散参数的响应程度要比对源项变化的响应程度要高。多种因子对核电厂核素大气扩散特征的综合效应还需进一步研究。

Simulation analysis method about the effect of impact factor on accident consequence assessment of nuclear power plant is presented in this study. Taking an inland nuclear power plant site as the research region, the accident consequence assessment model is applied to simulate the response characters of accident atmos- phere dispersion factor and effective dose of nuclear power plant to diffusion characters and source term change. Results show that the happen frequency of maximum atmosphere dispersion factor under horizontal diffusion scenario is lower than that under vertical diffusion scenario. The happen frequency of maximum effective dose under source term change scenario is higher than that under diffusion parameter change scenario, but the effect of diffusion parameter on effective dose is higher than that of source term change The complex effect of multi impact factors on atmosphere dispersion of radionuclide of nuclear power plant need to be studied in further research.