Accelerated physical modelling of radioactive waste migration in soil
Accelerated physical modelling of radioactive waste migration in soil
复制标题
放射性废物在土壤中迁移的加速物理模拟
DOI：
10.1139/t94-080
复制
发表时间：
1994
影响因子：
3.6
通讯作者：
A. De
中科院分区：
文献类型：
--
作者：
T. Zimmie;M. Mahmud;A. De
100克吨土工离心机被用来研究污染物和放射性示踪剂通过饱和土壤介质的长期迁移。 离心机的使用模拟了原型中的走时加速度，该加速度比模型大N倍N2，其中N是期望的g水平。对于在60 g下运行5 h，测试模拟了比测试的小规模模型大60倍的原型的约2年的迁移时间。 碘131（I-131），作为示踪剂，被注入到土壤的表面，并允许通过饱和土壤的恒定水头迁移。使用端窗盖革-缪勒（G-M）管来测量流过土壤的放射性示踪剂的计数率。从一个G-M管的峰值响应到另一个G-M管的峰值响应的时间表示流域中两点之间的走时。使用放射性示踪剂获得的结果与在相同的模型装置上使用钾渗透剂进行的试验吻合得很好。
A 100 g-tonne geotechnical centrifuge was used to study the long-term migration of a contaminant and radioactive tracer through a saturated soil medium. The use of the centrifuge simulates the acceleration of traveltime in the prototype, which is N times larger than the model, by N2, where N is the desired g level. For a 5 h run at 60 g, the test modelled a migration time of about 2 years for a prototype 60 times larger than the small-scale model tested. Iodine 131 (I-131), used as the tracer, was injected onto the surface of the soil, and was allowed to migrate with a constant head of water through the saturated soil. End window Geiger–Mueller (G–M) tubes were used to measure the count rate of the radioactive tracer flowing through the soil. The time from the peak response of one G–M tube to the other denotes the traveltime between the two points in the flow domain. The results obtained using the radioactive tracer are in good agreement with the test performed on the same model setup using potassium perm...