R&D for accuracy improvement of neutron nuclear data on minor actinides, 10; High quality evaluation via bouncing ideas off measurement and evaluation

Iwamoto, Osamu  ; Iwamoto, Nobuyuki  ; Mizuyama, Kazuhito

Under Innovative Nuclear Research and Development Program, "R&D for accuracy improvement of neutron nuclear data on minor actinides", present status of measurements and evaluations for MA nuclear data has been reviewed for "High quality evaluation via bouncing ideas off measurement and evaluation". The important MAs of Np-237 and Am-241, 243 were investigated in the thermal to fast neutron region. It was found that measured data for the thermal neutron cross sections of Np-237 and Am-241 were converging to a value with 5 to 6% discrepancies. The errors in evaluated nuclear data library were checked by comparing with the experimental data. Data for important FPs of Tc-99, I-129 etc. were also reviewed. In this presentation, a plan and result of review for a part of nuclear data evaluation of the program will be reported.