[1M15-19] JENDL-5 Examination

[1M15] Effect of thermal scattering law data for H in H₂O of JENDL-5 at several moderator temperatures on neutronics calculation

*Kenichi Tada¹, Tomoaki Watanabe¹, Tomohiro Endo², Akio Yamamoto² (1. JAEA, 2. Nagoya Univ.)

Keywords:JENDL-5, Thermal Scattering Law data, H in H2O, Moderator temperature

The PWR pin-cell calculations using the cross section data of each evaluated nuclear data library were compared at several moderator temperatures for the verification of the thermal scattering law data for H in H₂O of JENDL-5. Compared with the commonly used evaluated nuclear data libraries JENDL-4.0 and ENDF-B/VII.1, the relative differences of k-infinity varied with the moderator temperature. This difference may affect the moderator temperature coefficient. However, it is difficult to judge which library is good since there are not so much experimental data for the cross section and double differential cross section measurement of high-temperature H in H₂O data. Additional experimental data are required to improve the prediction accuracy of the thermal scattering law data for H in H₂O data.