Reactor benchmark tests for JENDL-5

Tada, Kenichi   

The latest version of Japanese Evaluated Nuclear Data Library, JENDL-5, was released in December of 2021. To investigate the prediction accuracy of JENDL-5 for criticality of reactor cores, we performed benchmark tests by using the International Criticality Safety Benchmark Evaluation Project (ICSBEP) handbook. Judging from the overall results, we confirmed that JENDL-5 gave the better results than JENDL-4.0. The burn-up calculations using JENDL-5 for LWR pin cell and assembly geometries were also carried out and the calculation results were compared to the other nuclear data libraries. The calculation results indicate that the differences of Pu-239, Gd-155, and Gd-157 affect the burn-up calculations.