Effects of different initial porosities on waste repository of buffer material with high-level radioactivity
Received date: 2017-09-05
Online published: 2019-09-04
采用高放射性核废料处置库(high-level radioactive nuclear waste repsitory, HLWR)模型试验, 以核废料处置库近场的缓冲层 GMZ01 膨润土为研究对象, 建立轴对称模型. 采用有限元(finit element method, FEM)软件 Code-Bright, 考虑热-水-力(thermo-hydro-mechanical, THM)耦合作用, 研究作为缓冲层的 GMZ01 膨润土在处置库关闭后, 不同压实度(初始孔隙率)对处置库渗流场、应力、温度的影响, 得到了不同初始孔隙率膨润土在处置库封闭运行后温度、饱和度、吸力、 应力等性状随时间的变化. 实验结果可为中国北山核废料处置库的规划、设计、可行性分析提供一定的参考.
关键词： GMZ 膨润土; 热-水-力耦合; 压实度变化; 有限元软件 Code-Bright; 孔隙率变化
秦爱芳, 贾旭 . 初始孔隙率对高放射性废物处置库缓冲材料性状的影响[J]. 上海大学学报(自然科学版), 2019 , 25(4) : 516 -525 . DOI: 10.12066/j.issn.1007-2861.1971
A model test for high-level radioactive nuclear waste repository (HLWR) was carried out to study the GMZ01 bentonite nuclear waste repository in the near field. An axisymmetric model was established, and the full thermo-hydro-mechanical (THM) coupling considered using the finit element method (FEM) software Code-Bright. With the repositories closed, the effect of different degrees of compaction (porosity) on disposal of seepage, stress and temperature were observed. Variations in temperature, saturation, suction, and stress with time on different initial porosity were obtained. The results provide references for the analysis of planning, design, feasibility of China Beishan Nuclear Waste Repository.
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