Avanços Recentes na Aplicação de um Método Numérico Espectronodal para Solução de Problemas Unidimensionais de Blindagem de Nêutrons

In this work, it is presented the application of a spectral nodal method (coarse-mesh) in the solution of one-dimensional neutron shielding problems, in the discrete ordinates and energy multigroup formulations. This method, named Modifed Spectral Deterministic (MSD), represents a modification of the calculation structure of the neutron angular flux in the sweeping process used in the Spectral Deterministic Method (SDM). The numerical results for 3 model-problems are shown, with different dimensions, number of energy groups and types of boundary conditions in using a computational application developed in the programming language C++.