Comparison of nuclide evolution analyses between Japanese and French codes

摘要

Benchmark problem based on Japanese Post Irradiation Experiment (PIE) data was analyzed by Japanese nuclide evolution analysis code and French one under the cooperative research program between the Japanese University Association (JUA) in Japan and Commissariat a l'Enegie Atomique (CEA) in France. Significant discrepancies over 10% were found between the Japanese and French results for ~(238)Pu, ~(243)Am, ~(244)Cm, ~(125)Sb, ~(154)Eu, ~(134)Cs and ~(144)Ce. It was found that those differences were almost caused by the differences of the cross sections and the fission yields. Furthermore, as for the effect to critical safety, multiplication factors were analyzed based on the isotopic compositions calculated by the codes. However, no significant effect to the multiplication factors was observed between Japan and French results.