Acceleration method for neutron transport equation with highly anisotropic scattering

SN method is wildly used to solve neutron transport equation, but SN method is very slow with highly anisotropic scattering.In this paper, the modified PN synthetic acceleration (MPSA) method is used to accelerate SN method, and applied to the code of ANISN which is internationally used. MPSA method not only can accelerate the computation with low-order of angular flux moments, but also with high-order of angular flux moments. So MPSA method is more efficient than DSA method. Numerical results for the test problems demonstrate that MPSA method is quiet efficient and robust, especially for the problems with highly anisotropic scattering. (authors)