EVALUATION OF SCALE 6.1.2 TSUNAMI MODULE FOR SELECTION OF REPRESENTATIVE BENCHMARKS FOR VALIDATION OF CRITICALITY SAFETY STUDIES

摘要

The validation process of the codes used in criticality safety studies is an indispensable step in determining the permissible criteria for the criticality safety calculations. Several methods exist to choose critical experiments representative of the configuration of calculation leading to the maximum of reactivity, including one, the so-called "expert" approach, based on macroscopic physical parameters (physicochemical material, average energy of neutron leading to a fission, ...). Although this approach is most commonly used by criticality experts in France, it has the disadvantage of having to know, in the most exhaustive way possible, all the criticality experiments available to select the experiments representative of the case of computation studied. Consequently, the search for tools enabling a pre-selection of the critical experiments that are closest neutronically to the situation studied would make it possible to reduce this step in the development of a criticality safety study. The objective of the paper is to present, on a set of configurations resulting from criticality calculation notes where validation process has already been done using expert approach, a comparison of the results of correlation coefficient produced by SCALE 6.1.2 TSUNAMI module in regards to benchmarks selected by "expert" approach.