FEMSYN - A Code System to Solve Multigroup Diffusion Theory Equations Using a Variety of Solution Techniques. Part 2: DIFXYZ - The Finite Difference Module

摘要

A code called DIFXYZ has been developed for the finite difference solution of diffusion theory equations in 1-D, 2-D and 3-D Cartesian geometry. It uses central differencing scheme. DIFXYZ can be used for determining the eigenvalue, fluxes, their adjoint and power distribution. Homogeneous as well as inhomogeneous boundary conditions can be applied in all directions. The code is written in variable dimensions so that any combination of number of energy groups and number of spatial meshes can be considered. Diagonal or octant symmetry can be used in radial plane. Acceleration techniques like successive line over relaxation with optimum parameter determined by program, two parameter Chebyschev acceleration for fission source, row or column rebalancing etc. are incorporated in DIFXYZ and facilitate fast convergence of eigenvalue and flux profile. 4 refs. (Atomindex citation 17:036518)