Abstract
Chemical isotopic analyses were carried out on high burn-up PWR-UO2, BWR- UO2 and PWR-MOX spent fuels, and ORIGEN2/82 code was verified with the original libraries and new libraries (ORLIBJ32) based on JENDL-3.2. The C/E values evaluated in the literatures were also reviewed. The burn-up and void dependency of the C/E for major actinides and fission products were discussed. The difference of branch ratio from 241Am to 242mAm by (n, γ) reaction between libraries suggests the main reason of underestimation of the C/E of 244Cm with ORLIBJ32.
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