Effect of glass cooling method on thermal shock behavior of nuclear waste container

Abstract It is proposed to simulate the injection process of glassy nuclear waste in ANSYS Workbench simulation platform combined with life and death element method. After verifying the feasibility of the simulation method in COMSOL Multiphysics software, the influence and law of different cooling environments on the thermal shock behavior of the container are discussed, and the thermal-structural characteristics of the container during the injection process of high temperature glassy nuclear waste are understood. The results show that the temperature change trend of the model obtained by the heat transfer coefficient function simulation method and the simulated external flow method is consistent. In order to simplify the calculation, the heat transfer coefficient method is used to simulate the injection process of the container. The thermal calculation results show that the temperature on the side wall of the container is not uniform during the injection process, and the material above the liquid surface will produce large stress due to mutual restraint, and the container will undergo plastic deformation when heated. Compared with the results of injection in the natural environment, the external wall of the container is cooled more obviously after forced convection cooling, which effectively alleviates the stress concentration in the upper head and reduces the deformation of the upper head. The water cooling method makes the upper head almost no downward concave deformation, but the stress concentration at the lower head position is more obvious.