摘要
在自行设计的吸附槽、扩散槽和渗透槽中分别做了核素￣（７５）Ｓｅ（以模拟裂片核素￣（７９）Ｓｅ）在整块花岗岩（取自北京周口店）中的吸附、扩散和渗透实验，测得了含￣（７５）Ｓｅ岩石平衡水在岩石中的孔隙流速、弥散系数和迟滞因子。根据核素在花岗岩中迁移过程的吸附、弥散和流动提出了数学模型，并用计算机求解得到核素￣（７５）Ｓｅ在花岗岩中随时空变化的分布函数。
The migration behaviour of nuclide ￣(75)Se,representing the long lived fission product ￣(79)Se,inBeijing granite is studied by means of sorption,diffusion and permeability measurement in a self-designed cells.The interstitial flow velocity,the longitudinal dispersion coefficient and the effec-tive interstice fraction are obtained.Based on the sorption,longitudinal dispersion and flow,adifferential equation describing the migration behaviour of nuclide in granite is suggested.Thedistribution function and numerical solution of nuclide ￣(75)Se in granite are also given by using com-puter.
出处
《核化学与放射化学》
CSCD
北大核心
1994年第4期193-198,共6页
Journal of Nuclear and Radiochemistry
基金
核工业科学基金资助项目
关键词
裂片核素
硒75
花岗岩
迁移
^(75)Se
Interstitial flow velocity
Longitudinal dispersion coefficient
Effective interstice fraction
