核废料处置库近场热-水-力耦合性状

采用高放射性核废料处置库模型试验,以核废料处置库近场的膨润土及岩石为研究对象,建立轴对称模型,选用适当的热、水、力本构方程,运用有限元软件code-bright对核废料处置库关闭后处置库近场的温度场、渗流场、应力场进行考虑TH, HM, TM部分耦合与THM完全耦合的数值模拟分析。得到处置库关闭后近场膨润土及岩石内温度、液体饱和度、应力的变化规律及不同耦合对这些性状影响的敏感度。结果可为核废料处置库的规划、设计以及数值分析时耦合类型的选择提供参考。

Coupled Thermo-Hydro-Mechanical Properties in Field near Nuclear Waste Repository

A model test for high-level radioactive nuclear waste repository is adopted. An axisymmetric model test on the bentonite and rock in the near-field of the nuclear waste repository is established. By considering the thermo-hydro-mechanical coupled process, the temperature field, seepage field, and stress field in near-field after the closure of nuclear waste repository are simulated through partially coupled TH, HM, TM and the fully coupled THM method with using code-bright software. By comparing the results including bentonite and rock temperature, liquid saturation, variation of stress of the partially coupled method with those of fully coupled method, and analyzing their sensitivity of different coupled methods influencing these traits. valuable reference is presented for planning, designing of the nuclear waste repository and coupled type choice in the numerical analysis.