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Etudes de la faisabilité d'utiliser une grille universelle en énergie en ponctuel ou un découpage multigroupe fin dans les calculs de criticité avec le code MORET 5


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Titre du congrès :Mathematics & Computations and Supercomputing in Nuclear Applications (M&C+SNA 2007) Ville du congrès :Monterey Date du congrès :15/04/2007

Type de document > *Congrès/colloque

Mots clés > criticité, Monte Carlo, MORET (code), ponctuel, woodcock

Unité de recherche > IRSN/DSU/SEC/LERD

Auteurs > FORESTIER Benoit, HAECK Wim, JACQUET Olivier, MISS Joachim, VERBOOMEN Bernard

Date de publication > 19/04/2007

Résumé

So far, the cross-sections used by the MORET code (developed by IRSN) could only be taken from external multi-group libraries. Then, it has been decided to plan new developments in MORET 5 to control the whole criticality calculation process, from the reading of nuclear data to the Monte Carlo simulation itself. The features related to this new version will allow to perform criticality calculations either with a multi-group or a continuous energy treatment based on different nuclear data evaluations. However, these improvements tend to increase simulation calculation times, in particular for non homogenized calculations. That is why some reflections were made in order to find various means to reduce the computing times. The purpose of this research is to study the feasibility and the efficiency of performing MORET 5 calculations with two types of optimized cross sections libraries: one for a very fine multi-group treatment and another for a universal continuous energy treatment. First results of the new Woodcock tracking implementation are also presented in this paper.