Abstract: To demonstrate the feasibility and accuracy of the ANSYS software for temperature field prediction in High-level radioactive waste (HLW) repository, ANSYS workbench is used as a platform for 2D model and 3D model simulation based on the self-designed thermal effect device and its corresponding experimental parameters. The results show that the simulation data has a high goodness of fit to the experimental data. The average of the relative difference between simulation data and experiment data for the three concerned sensors are 0.68%, 0.60% and 0.50%, respectively, during the heating stage, while the average of relative difference is 1.34% during the balance stage. It is indicated that the ANSYS thermal analysis is feasible for temperature field prediction of the disposal unit in HLW repository.

Key words: HLW, disposal unit, ANSYS simulation, temperature field