\section*{Copyright Notice for TRIVAC} The development of TRIVAC is financially supported, directly or indirectly, by various organizations including \'{E}cole Polytechnique de Montr\'{e}al, Hydro--Qu\'{e}bec and the Hydro--Qu\'{e}bec chair in nuclear engineering, the Natural Science and Engineering Research Council of Canada (NSERC), Atomic Energy of Canada limited (AECL) and the CANDU Owners Group (COG). The code TRIVAC and its users guide are and will remain the property of \'{E}cole Polytechnique de Montr\'{e}al. \vskip 0.15cm Trivac is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. \vskip 0.15cm Permission is granted to the public to copy TRIVAC without charge. \'{E}cole Polytechnique de Montr\'{e}al, makes no warranty, express or implied, and assumes no liability or responsibility for the use of TRIVAC.