核电厂址事故大气弥散因子计算的实验与理论研究

在目前常用的计算核电厂事故概率大气扩散因子的模式基础上提出了考虑内边界层影响的计算模式，根据某待建滨海核电厂址大气弥散实验的实测参数，分别采用本模式和常用模式估算了厂址边界０．５ｋｍ外的最终评价用事故概率扩散因子和各途径的剂量及有效剂量。计算结果表明，无论是事故概率扩散因子还是个人有效剂量，本模式给出的值都是常用模式的５．９倍。因此，在不能忽略内边界层出现频率的滨海厂址，必须考虑内边界层对事故扩散

Calculation of atmospheric dispersion factor for accident release from coastal nuclear power

A model of calculating the probabilistic atmospheric dispersion factor for accident release from nuclear power plant (NPP),in which the effect of internal bound layer was taken into account,was proposed.The final accident probabilistic dispersion factor used to evaluate dose,the dose for each pathway and the individual effective dose at the bound of a coastal NPP (0.5?km from the coastline) were estimated.The measured parameters from field atmosphere dispersion experiment on site of a NPP were applied.The result showed that not only the value of accident probabilistic dispersion factor but also the value of individual effective dose predicted were 5.9 times higher than those derived by a traditional model.Hence,the effect of internal bound layer on the accident dispersion factor and dose must be taken into account for coastal NPP when the frequency occurring internal bound layer is too high to be neglected.