空间区域分解适合于大规模并行求解中子输运方程,但是子区域的增多会导致收敛变慢。为了克服这一缺点,采用粗网有限差分(CMFD)技术对空间区域分解的并行特征线方法(MOC)进行加速。使用ScaLAPACK求解CMFD粗网扩散方程;CMFD的粗网解既用来修正细网标通量,又用于修正内界面角通量。一维MOC数值结果表明,对于区域分解并行的MOC,CMFD技术是一种十分高效的加速方法,可以显著提高收敛速度。 Spatial region decomposition is suitable for large-scale parallel solver neutron transport equations, but the increase of sub-regions will lead to slow convergence. To overcome this shortcoming, coarse-line Finite Difference (CMFD) technique is used to speed up the parallel characteristic line method (MOC) of spatial domain decomposition. The ScaLAPACK was used to solve the CMFD coarse-mesh diffusion equation. The coarse mesh solution of CMFD was used to correct both the fine mesh flux and the internal interface flux. The one-dimensional MOC numerical results show that CMFD is a very efficient acceleration method for regional decomposition parallel MOC, which can significantly improve the convergence rate.