Table of Contents
International Journal of Nuclear Energy
Volume 2014, Article ID 186189, 12 pages
Research Article

Analysis of Loss of Flow Events on Brazilian Multipurpose Reactor Using the Relap5 Code

1Departamento de Engenharia Nuclear, Universidade Federal de Minas Gerais, Campus UFMG, Avenida Antônio Carlos 6627, PCA1, Anexo Engenharia, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
2Instituto Nacional de Ciências e Tecnologia de Reatores Nucleares Inovadores/CNPq, UFRJ, Avenida Pedro Calmon 550, Cidade Universitária, 21941-901 Rio de Janeiro, RJ, Brazil
3Centro de Desenvolvimento da Tecnologia Nuclear, Comissão Nacional de Energia Nuclear, Campus UFMG, Avenida Antônio Carlos 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil

Received 3 October 2013; Revised 21 February 2014; Accepted 24 February 2014; Published 3 June 2014

Academic Editor: Adem Acir

Copyright © 2014 Humberto V. Soares et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This work presents the thermal hydraulic simulation of the Brazilian multipurpose reactor (RMB) using a RELAP5/MOD3.3 model. Beyond steady state calculations, three transient cases of loss of flow accident (LOFA) in the primary cooling system have been simulated. The RELAP5 simulations demonstrate that after all initiating events, the reactor reaches a safe new steady state keeping the integrity and safety of the core. Moreover, a sensitivity study was performed to verify the nodalization behavior due to the variation of the thermal hydraulic channels in the reactor core. Transient calculations demonstrate that both nodalizations follow approximately the same behavior.