一个预测核事故后果的动态食物链模式与程序

A DYNAMIC FOODCHAIN MODEL AND PROGRAM FOR PREDICTING THE CONSEQUENCES OF NUCLEAR ACCIDENT

描述了一个新近建立与开发的能预测核事故后果的动态食物链模式与程序。它既适用于西方饮食谱，也适用于中国居民的饮食谱。此模式考虑了干、湿沉积截获和初始滞留、易位、入渗、根部吸收、耕作等过程对事故释放导致的植物可食部位中核素浓度的影响。也考虑了动物对核素的摄入、食品加工的影响及人体食入途径对核素的摄入率。在干沉积中考虑了有效叶面积指数对干沉积量的影响，在湿沉积中考虑了事故期间不同时段不同降雨强度对湿沉积量的贡献的计算方法。程序由１个主程序和５个子程序组成，分别计算植物与土壤表面的干、湿沉积量；核素在植物中的易位，植物可食部分及动物产品中的核素浓度及人体的摄入量等。

A dynamic foodchain model and program for predicting the radiological consequences of nuclear accident has been developed.They are not only suitable to the west foodchain but also to the chinese food chain.The following processes which will make an impact on radionuclide concentration in the edible parts of vegetable caused by accident release are considered:dry and wet deposition interception and initial retention,translocation,percolation,root uptake and tillage.Intake rate of animal,effects of processing and intake rate of man through ingestion pathway were also considered in calculation.The effect of leaf area index(LAI)of vegetable was considered in dry deposition model.A method to calculate the contribution of rain with different periods and different intensities to total wet deposition was established.The program contains 1 main code and 5 subcodes to calculate dry and wet deposition on surface of vegetable and soil,translocation of nuclides in vegetable,nuclide concentration in the edible parts of vegetable and in animal products and intake rate of man and so on.