A response matrix high-order nodal method for rectangular and hexagonal lattices

A nodal method for the solution of the multidimensional neutron group-diffusion equations in rectangular and hexagonal geometries is presented. A set of coupled one-dimensional integral equations is expanded in high order Legendre polynomials, and solved by weighted-residual procedures. Interface average partial curents are coupled through a Response Matrix formulation. This formalism has been programmed as a computer code called RHENO, and rectangular and hexagonal benchmark problems were tested, showing the capability of the method to yield accurate predictions. (author)