非均匀溶液系统的临界安全分析是核燃料后处理工艺研究中的一个非常关键的问题。对于解决这一类不稳定、瞬态过程中的临界安全问题,蒙特卡罗模拟方法儿乎是唯一的分析手段。为了有效地解决这一复杂问题,尝试将其作为一类微扰问题来考虑,利用蒙特卡罗方法在解次微扰问题方面的一些独特的方法技巧,以进一步发挥蒙特卡罗模拟技术在核燃料后处理复杂工艺过程中临界安全分析中的作用。 The critical safety analysis of heterogeneous solution systems is a key issue in the research of nuclear fuel aftertreatment process. Monte Carlo simulation is almost the only analytical tool to solve this type of unstable, transient critical safety issue. In order to solve this complex problem effectively, we try to consider it as a kind of perturbation problem and use some unique method techniques of Monte-Carlo method in solving perturbation problems so as to make further use of Monte Carlo simulation technology in nuclear fuel The role of post-processing in complex process critical safety analysis.