Nuclear data sensitivity analysis for isotopic generation using JEFF-3.1.1 and -3.2

In burn-up calculations, accuracy of isotopic generation prediction strongly depends on the nuclear data. In this study, we perform burn-up calculations using neutron cross section data from JEFF-3.1.1 and -3.2, and compare the calculation results with PIE (Post Irradiation Examination) data. We also perform burn-up sensitivity analysis based on the generalized perturbation theory to clarify the cause of differences on the isotopic generations between the libraries. As a result, except some nuclides, there have not been so large discrepancies generally between JEFF-3.1.1 and -3.2. Furthermore, we clarify the causes of the discrepancies which are over 5%. Cross sections of some nuclides have large differences between JEFF-3.1.1 and -3.2, and they have given relatively large impacts on specific isotopic generation predictions. (author)