聚变-裂变混合能源堆球模型中子学对算研究

利用蒙特卡罗程序和自主开发的蒙特卡罗-燃耗耦合程序MOCouple-s，对北京应用物理与计算数学研究所提出的聚变-裂变混合能源堆球模型进行了对算研究。对初始时刻及各燃耗时刻下的有效增殖因数、能量倍增因子、氚增殖比、中子源强度等堆芯参数进行了比较，结果总体符合较好。对寿期末重要核素的成分进行了详细比较，除个别核素外，偏差很小，表明所采用的计算程序与核参数库一致性良好。对核参数库的选择、铀水体积比等对燃耗计算结果的影响进行敏感性分析，并对外中子源驱动的次临界堆芯的燃耗计算进行详细讨论，提出可行的燃耗计算基准。

Comparative Study on Spherical Model of Fusion-Fission Hybrid Energy Reactor

The comparative study on fusion-fission hybrid spherical model proposed by the Institute of Applied Physics and Computational Mathematics was performed with Monte-Carlo code and MOCouple-s code.Comparisons of reactor parameters,such as neutron effective multiplication factor,energy multiplication factor,tritium breeding ratio and neutron source intensity,were made.The results agree well with the reference as a whole.The concentrations of important isotopes were also compared in detail.Most of the biases are very small except a tiny fraction of the iotopes.It proves that both codes and nuclear data library have very good consistency.In calculation of the model used,the burnup sensitivity of nuclear data and uranium-water ratio employed in the simulation model were analyzed.For such a fixed external source driven subcritical reactor core,detailed discussion was made about the burnup calculation method,and a feasible burnup calculation benchmark was proposed.