【摘要】 本文介绍的粗网有限差分法求解二维双群中子扩散方程，可用于反应堆燃料管理中的燃耗计算，计算结果与通用的细网有限差分法、节块格林函数方法作了比较，其有效增殖系数的相对误差小于０．０８％，该方法具有计算时间短、满足一定精度要求等特点，适用于工程初步设计的燃料管理分析。更多还原

【Abstract】 A coarse mesh finite difference method for solving neutron diffusion equation is presented in this paper. It is used for the burn up calculation in fuel management of reactors. its calculation results are compared with the results of general fine mesh finite differential method and nodal Green’s function method (NGFM). The relative error of their effective multiplication factor Keff is less than 0.08%. The method is considered to use for the calculation of fuel management in the engineering preliminary design, which uses less CPU time, and its calculation results have certain accuracy.更多还原