The objective of this work is to determine which of the main three fuel types (UO₂, (Th,U)O₂ and MOX fuel) can burn minor actinides (MAs) effectively and at the same time sustain the main operating parameters at an acceptable level. The effect of adding 1 wt % of MAs to the main three fuel types on the infinity multiplication factor (K_inf), thermal neutron flux and the actinides’ concentration is investigated using MCNPX code version 2.7. The MAs can be used to regulate the excess reactivity of the reactor. The variation of the MAs concentration with burnup is studied to distinguish the fuel type that has the ability to burn a large amount of MAs. The transmutations of MAs in the pressurized water reactor (PWR) affect the level of radioactivity of the spent fuel. The main operating parameters are calculated to assess the possibility of burning MAs in the PWR. A comprehensive mathematical study of the results is performed to assess the performance of three fuel types after adding the MAs. Hence, determine the best fuel type. The mathematical study utilizes one of the known multi-criteria decision-making methods, the technique of order preference by similarity to an ideal solution (TOPSIS).

这项工作的目的是确定三种主要燃料类型（UO ₂，（Th，U）O ₂和MOX燃料）中的哪一种可以有效燃烧次act系元素（MAs），并同时维持主要运行参数在可接受的水平。在三种主要燃料中添加1 wt％的MA对无穷倍增系数（K _inf），热中子通量和the系元素的浓度使用MCNPX代码2.7版进行了研究。MA可以用于调节反应器的过量反应性。研究了MAs浓度随燃耗的变化，以区分具有燃烧大量MAs能力的燃料类型。MA在压水堆（PWR）中的变影响乏燃料的放射性水平。计算主要工作参数以评估在压水堆中烧毁MA的可能性。添加结果后，将对结果进行全面的数学研究，以评估三种燃料类型的性能。因此，确定最佳燃料类型。数学研究利用了一种已知的多准则决策方法，