Microstructure Evolution of UO2 Impacted by Simulated Thermal Spike

作者：Shang Jiacheng^*; Liu Ying; Tu Mingjing

来源：Rare Metal Materials and Engineering, 2013, 42(9): 1884-1888.

• uranium dioxide
• molecular dynamics
• thermal spike

A thermal spike model has been established and the high energy damage of UO2 was simulated by a molecular dynamics method. Different input temperatures and different input radii were set in single thermal spike simulation. The atoms in the central zone are activated by the thermal energy and passes to the outer layer with pressure wave style fast. The recovery happens simultaneously with a vast number of departure atoms. The final configurations are three types including amorphous, semi-amorphous and crystal. The simulation results can reproduce the physical process of thermal spike irradiation well. The affected zone which is too tiny to be viewed by experimental instruments can be observed directly.

• 出版日期2013-9
• 单位中国核动力研究设计院