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本文在TOUGH2源程序的基础上,改进了用于模拟放射性核素在饱和-非饱和地下水中运移的模块EOS7R,使之可以同时计算多种核素组分。改进后的程序经检验运行正常。本文同时设计一个理想算例,考虑多种常见低中放核素,按半衰期与分配系数等特征分类比较。结果表明,吸附作用是核素通过包气带过程中的主要影响因素。本文提出的针对TOUGH2源程序的改进思路,实现了多种核素组分模拟的目的,并且有效节省了计算时间。
Based on the TOUGH2 source code, this paper improves the EOS7R module for simulating radionuclide migration in saturated-unsaturated groundwater so that it can simultaneously calculate a variety of radionuclide components. The improved program is tested and operates normally. In the meantime, we design an ideal case to consider a variety of common low-level radionuclides and classify them according to half-life and distribution coefficients. The results show that the adsorption is the main influencing factor of the radionuclide through the aeration zone. In this paper, aiming at the improvement of TOUGH2 source program, it realizes the simulation of many kinds of nuclide components and saves the calculation time effectively.