水流速度对锶迁移影响的实验研究  

Experiment on Effect of Water Flow Velocity on Migration of Strontium

作　　者：王志明[1] 郭谦[1] 李书绅[1] 焦志兰[1] 孟莉萍[1] 郭志明[1] 

机构地区：[1]中国辐射防护研究院,山西太原030006

出　　处：《原子能科学技术》2003年第4期320-324,共5页Atomic Energy Science and Technology

摘　　要：分别采用不饱水和饱水黄土土柱对稳定元素锶的迁移进行了示踪实验,结果发现,锶在两类未扰动土柱中的延迟系数可以很好地衔接。对锶的延迟系数进行研究的结果表明:无论在不饱水土柱还是饱水土柱,锶在黄土中的延迟系数Rd不是常数,而随水流速度的增加而增大;无论按峰位还是按质心位置计算,单位喷淋强度下锶的迁移速度随水的喷淋强度的增加而减小。这表明,为了描述锶在黄土中的迁移,使用平衡吸附模式是不合适的。Tracer migration experiment of stable element, strontium, is conducted in both unsaturated and saturated columns with undisturbed loess. It is found from the experiment that retardation coefficient, Rd, of Sr can be joined up very well. It can be seen that retardation coefficient, Rd, of Sr in loess is not constant and increases with water flow velocity either in unsaturated columns or in saturated columns, as well as migration velocity of Sr at unit sprinkling rate decreases with sprinkling rate according to positions of either peaks or mass centers. It is shown that to use equilibrium adsorption model is not proper for describing migration of Sr in loess.

关 键 词：水流速度 锶 迁移 影响 黄土土柱 延迟系数 喷淋强度 平衡吸附模式 放射性废物处置 

分 类 号：TL942.1[核科学技术—辐射防护及环境保护]