Critical benchmarks in multigroup neutron transport

Space eigenfunction expansions are used within the multigroup neutron transport model in order to solve the criticality problem for homogeneous multiplying structures, without introducing any numerical space discretization. The solutions that can be produced by truncating the series are highly reliable, and can be considered, when calculated for a sufficiently high order of approximation as analytical benchmarks. Some significant sample results will also be presented, in order to demonstrate the convergence trend of the methodology that is herewith proposed. (author)