Validation of new fission yield by analysis of post-irradiation examination

Fission yield is an important physical quantity to evaluate the amount of fission products after irradiation. Tokyo Institute of Technology (Tokyo Tech) newly evaluated fission yield. It is necessary to confirm the validity of the fission yield evaluated by Tokyo Tech because the fission yield is expected to be included in the next Japanese Evaluated Nuclear Data Library (JENDL). In this study, the analysis of post-irradiation examination using JENDL FP Fission Yields Data File 2011 (FPY-2011) and new fission yield was performed. The integrated burnup calculation code system SWAT4.0 was used for the analysis. BM5 sample of the Swiss Beznau-1 PWR was used in this study. It was found that the C/E values using new fission yield for Sm151, Sm152 and Eu151 are improved more than 10%. The improvement of the C/E value of Sm151, Sm152 and Eu151 mainly come from the updating fission yield of Pu241. (author)