1. Nuclear Technology Department, CEA, 13108 Saint Paul lez Durance Cedex, France
2. Imaging and Simulation for Control Department, CEA, 91191 Gif-sur-Yvette Cedex, France
3. EDF, SEPTEN, 12-14 Avenue Dutrievoz, 69628 Villeurbanne Cedex, France
4. Nuclear Power Division, AREVA, 10 rue Juliette Récamier, 69456 Lyon Cedex 06, France