水泥固化体的非饱和浸出实验  

LEACHING EXPERIMENT OF CEMENT SOLIDIFIED WASTE FORM UNDER UNSATURATED CONDITION

作　　者：王志明[1] 姚来根[1] 李书绅[1] 赵英杰[1] 蔡匀[1] 李丹[1] 韩新生[1] 安永锋[1] 

机构地区：[1]中国辐射防护研究院,太原030006

出　　处：《辐射防护》2003年第3期156-162,共7页Radiation Protection

摘　　要：采用自行研制的非饱和浸出实验装置 ,用石英砂作蓄水介质 ,将 8种规格 (体积在 4 0 .2～1 694 5 .5cm3 之间 )的水泥固化体试块置于密封容器中 ,进行了非饱和浸出实验。实验的含水量系列有5种 ,在 0 .1 5～ 0 .4 0之间。非饱和浸出实验结果表明 ,在固化体试块体积 4 5 86.7cm3 时 ,累积浸出份额F随固化体周围介质含水量θ的增加而增大 ,例如 ,含水量在 0 .35和 0 .1 5时 ,不同体积固化体其 360d的累积浸出份额之比在 1 .2 4～ 1 .4 1之间 ;累积浸出份额随固化体体积V的增大而减少 ;含水量较高时的浸出实验结果接近于饱水浸出实验结果 ;历时 1年的浸出实验显示 ,固化体试块的最大浸出深度约为 2 .2 5cm ;另外 ,浸出实验中间取样与否 ,对最后的累积浸出份额影响不大。A device for unsaturated leaching experiments was designed and built up. 8 different sizes, ranging from 40.2 cm3 to 16 945.5 cm3, of solidified waste form were tested in the experiment. 5 different water contents, from 0.15 to 0.40, were used for the experiment. The results show that the cumulative leaching fraction increases with water content when the sizes of the forms are equal to and less than 4 586.7 cm3, for example, the ratios of the cumulative leaching fractions are between 1.24～1.41 under water content of 0.35 and 0.15 on 360 day of Teaching. It can also be seen that the cumulative leaching fraction under higher water content is close to that under saturated condition. The cumulative leaching fraction decreases with size of the form. Maximum leached depth of the solidified waste forms is about 2.25 cm after one year Teaching. Moreover, it has no clear effect on cumulative leaching fraction that sampling or non-sampling during the experiment.$$$$(

关 键 词：水泥固化体 非饱和浸出实验 含水量 放射性废物 处置 

分 类 号：TL942[核科学技术—辐射防护及环境保护]