水泥固化体中核素浸出模型的比较研究  

Comparative Research on Leaching Models of Radionuclides in Cement Solidified Waste Forms

作　　者：李玉香[1] 全明[1] 易发成[1] 肖正学[1] 陈雅斓[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《辐射防护》2010年第4期214-219,共6页Radiation Protection

基　　金：国防基础科研项目(A3120080126);西南科技大学国防重点学科实验室重点培育项目

摘　　要：基于水泥固化体中放射性核素浸出的扩散机制,根据Fick第二定律及初始和边界条件建立了二维衰变浸出模型。通过修正表观扩散系数,用二维衰变浸出模型对实验室规模碱矿渣-黏土复合胶凝材料及工业规模抗硫酸盐水泥固化137Cs的浸出行为进行了预测,并与已有的一维浸出模型和一维衰变浸出模型进行了比较。结果表明,二维衰变浸出模型预测值与实验值的符合度较好。Based on the diffusion mechanism of radionuclide leaching from cement-solidified waste forms,a two-dimension decay leaching model （T-DLM） was established,according to Fick＇s second law and the initial and boundary conditions.The leaching behavior of 137 Cs in the lab-scale alkali-activated slag-clay minerals composite cement and full scale sulfate resistant cement waste forms was predicted using the T-DLM,via correcting its apparent diffusion coefficient.It was compared with the one-dimension leaching model and one-dimension decay leaching model available.The results indicate that the values calculated using the T-DLM are in a better agreement with the experimental values.

关 键 词：水泥固化体 放射性核素 浸出行为 浸出模型 

分 类 号：TL941[核科学技术—辐射防护及环境保护]