Monte Carlo fission matrix acceleration method based on redistributing mesh

The fission matrix acceleration method based on redistributing mesh is proposed in this paper. The mesh used to tally the fission matrix is always fixed in previous fission matrix acceleration methods. When the mesh is redistributed in the process of iteration, the convergence rate of fission matrix acceleration method increases. The basic theory of redistributing mesh method is introduced. We analyze its efficiency and give some suggestions to enhance its stability. Numerical simulations of 1D slab geometries demonstrate that the fission matrix acceleration method based on redistributing mesh is more efficient.