1. Nuclear Engineering Program, Federal University of Rio de Janeiro, Av. Horácio Macedo, 2030, Bloco G, Sala 206—CT, Fundão, Rio de Janeiro, RJ, Brazil
2. Polytechnic School, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos, 149—CT, Fundão, Rio de Janeiro, RJ, Brazil