反应堆压力容器(RPV)钢作为压水堆核电厂中唯一不可更换的关键核心设备,是防止核电厂放射性泄漏的最主要屏障,其使用寿命决定了核电厂的使用寿命,从而影响了核电厂的经济性和安全性。材料中空洞、位错环和富铜析出物等缺陷会阻碍位错的运动,从而引起材料硬化。本文利用分子动力学方法研究了RPV钢中 Reactor Pressure Vessel (RPV) steel, as the only non-replaceable key core equipment in PWR nuclear power plant, is the most important barrier to prevent radioactive leakage of nuclear power plant. Its service life determines the service life of nuclear power plant, which affects the Economic and security. Defects in the material such as voids, dislocation loops, and copper-rich precipitates can hinder the movement of dislocations, causing the material to harden. In this paper, molecular dynamics method was used to study RPV steel