The reactivity-equivalent physical transformation method transforms the double heterogeneity problem into the traditional single heterogeneity problem, which has the advantages of simplicity and efficiency. However, the current reactivity-equivalent physical transformation methods mainly focus on rod-type fuel elements rather than plate-type elements. Therefore, an optimization research is conducted for the reactivity-equivalent physical transformation method applicable to fuel plates containing dispersed particles in this paper. First, this method is obtained by identifying three important ge...