核临界安全是核科技工业的特殊安全问题。临界安全研究对确保核工业的安全性和提高核工业的经济性具有重要意义。其中,临界实验是临界安全研究必不可少的基础工作。本工作是为模拟核 Nuclear criticality safety is a special safety issue for the nuclear science and technology industry. Critical safety research is of great importance to ensure the safety of nuclear industry and improve the economy of nuclear industry. Among them, the critical experiment is an essential basic work of critical safety research. This work is for the simulation of nuclear