核废料处置库近场的热-水-力耦合分析

Numerical analysis for coupled thermo-hydro-mechanical processes in near field of nuclear waste repository

为研究高放射性核废料地质处置的热-水-力耦合过程,以FEBEX原位试验为计算模型,利用有限元软件code-bright进行数值模拟分析,得到热-水-力耦合作用下处置库关闭后近场膨润土和岩石内温度、饱和度、吸力、应力及位移的变化规律,其结果可为核废料处置库的规划、设计以及缓冲/回填材料的选取提供参考.

To analyze coupled thermo-hydro-mechanical process for geological disposal of high level radioactive nuclear waste,a numerical analysis taking the FEBEX in-situ test for geological disposal of high level radioactive nuclear waste as the modeling object was carried out by using code-bright program. The variations of temperature, saturation degree, the suction, the stress and the displacement in bentonite and rock under the coupled thermo-hydro-mechancial action after the closure of nuclear waste repository are obtained. Valuable reference is presented for planning,designing of the nuclear waste repository and the selection of the buffer material.