一、问题的提出离散坐标法作为求解中子输运方程的数值方法在反应堆物理与屏蔽研究设计中占有重要的地位。我们用高阶各向异性散射的二维离敞坐标法,编制了扩展FORTRAN程序。该程序适用于(x,y),(r,θ),(r,Z),几何坐标,并含有真空边界、全反射边界、白边界、周期边界和入射源边界等五种可选择的边界条件。可以计算齐次或非齐次的稳态问题。 First, the problem proposed Discrete coordinate method as a numerical solution to the neutron transport equation in the reactor physics and shielding research and design occupy an important position. We have developed an extended FORTRAN program using the two-dimensional open-spaced coordinate method of high-order anisotropic scattering. This program is suitable for (x, y), (r, θ), (r, Z), geometric coordinates and contains five selectable boundaries of vacuum boundary, total reflection boundary, white boundary, periodic boundary and incident source boundary condition. Can calculate homogeneous or non-homogeneous steady-state problems.