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Science and Technology of Nuclear Installations
Volume 2012 (2012), Article ID 878174, 10 pages
Research Article

Heat and Mass Transfer during Hydrogen Generation in an Array of Fuel Bars of a BWR Using a Periodic Unit Cell

Área de Ingeniería en Recursos Energéticos, Universidad Autónoma Metropolitana, Unidad Iztapalapa Avenida San Rafael Atlixco 186, Col. Vicentina, 09340 México, DF, Mexico

Received 18 December 2011; Accepted 1 February 2012

Academic Editor: Alejandro Nuñez-Carrera

Copyright © 2012 H. Romero-Paredes 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 paper presents, the numerical analysis of heat and mass transfer during hydrogen generation in an array of fuel cylinder bars, each coated with a cladding and a steam current flowing outside the cylinders. The analysis considers the fuel element without mitigation effects. The system consists of a representative periodic unit cell where the initial and boundary-value problems for heat and mass transfer were solved. In this unit cell, we considered that a fuel element is coated by a cladding with steam surrounding it as a coolant. The numerical simulations allow describing the evolution of the temperature and concentration profiles inside the nuclear reactor and could be used as a basis for hybrid upscaling simulations.