Some remarks on the solution of the multigroup diffusion equation system by GALERKIN's method

Some applications of the GALERKIN method are described in a previous paper by Cermak et al. concerning the use of the system of coordinate functions which fulfil accurately the boundary and transition conditions at any finite number of these functions. Such a choice of coordinate functions often leads to some consequences which may influence the method's reliability and the convergence rate from the viewpoint of the number of coordinate functions. These effects are shown for a fast reactor in one-dimensional cylindrical geometry in the 26-group approximation. (author)