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一、引言大型动力堆的迅速发展对反应堆物理计算的精度和速度提出了更高的要求,为了满足这一要求,近十几年来,迅速发展起各种粗网格计算法。在所有粗网法中,先进节块法具有高速度、高精度的特点,因而得到了广泛的应用。以节块格林函数法为例,在相同的物理、几何条件下,对于一维中子扩散问题,节块格林函数法的计算速度比有限差分法快十倍。三维可以快一千倍。而且节块的平均功率最大误差小于1.0％,是目
I. INTRODUCTION The rapid development of large power reactors puts forward higher requirements on the accuracy and speed of reactor physics calculations. In order to meet this requirement, various coarse grid computing methods have been rapidly developed over the past decade. In all the coarse mesh method, advanced nodules method has the characteristics of high speed and high precision, and has been widely used. Taking the nodal Green’s function method as an example, under the same physical and geometric conditions, the nodal Green’s function method is ten times faster than the finite difference method for one-dimensional neutron diffusion. Three-dimensional can be a thousand times faster. And nodal average power maximum error of less than 1.0%, is the goal