摘要
高水平放射性废物处置的主要方法是深埋在地质岩石中。在研究放射性核素随地下水穿过岩石缝隙网的迁移中,扩散法起着重要的作用。本文测定了^(75)SeO_3^(2-)在花岗岩和石灰岩(取自北京郊区)中的扩散系数,并详细叙述了实验技术和分析方法。
A most promising way being considered for the disposal of radioactive waste is deep geological burial in rocks, such as granite and limestone.Diffusion measurements have been made on granite and limestone sampled from the suburbs of Beijing. 75Se(SeO32-) is used as a tracer simulating the long-lived 79Se. The diffusion experiment is carried out in a diffusion cell which is designed and fabricated in this laboratory. Details of the experimental technique and method of analysis are described and the most important diffusion parameters, namely, intrinsic diffusion coefficient Diy rock capacity factor and sorption coefficient K are given. The implications of the results are discussed.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
1991年第4期213-217,共5页
Journal of Nuclear and Radiochemistry
关键词
扩散系数
吸附系数
岩石
同位素
Diffusion coefficient, (75)~Se, Sorption coefficient.
