Analyses of fusion integral benchmark experiments at JAEA/FNS with FENDL-2.1 and other recent nuclear data libraries

The integral benchmark experiments (iron, SS316, copper, beryllium, lithium oxide) at Japan Atomic Energy Agency/Fusion Neutronics Source (JAEA/FNS) were analyzed with JENDL-3.3, FENDL-2.1, JEFF-3.1 and ENDF/B-VII.0 for comparison. As a result, the following conclusions are obtained: (1) Iron: ENDF/B-VII.0 is the best. JEFF-3.1 is slightly better than FENDL-2.1. JENDL-3.3 is not good. (2) SS316: All the libraries for nuclei included in SS316 seem to be good except for molybdenum, which may have some problems for low energy neutrons. (3) Copper: All the libraries are not good, particularly for low energy neutrons. (4) Beryllium: JEFF-3.1 is slightly better. All the libraries cause overestimation of low energy neutrons. (5) Lithium oxide: All the libraries are good.