Analysis of the EBR-II SHRT-45R Neutronics Benchmark with ERANOS-2.0

This paper discusses our calculations of the neutronics benchmark of the EBR-II Shutdown Heat Removal Test 45R (SHRT-45R). The SHRT-45R experiment was performed about 30 years ago in the EBR-II and involved an Unprotected Loss of Flow (ULOF). The experiment is now evaluated as a benchmark in a Coordinated Research Program of the IAEA. The SHRT-45R neutronics benchmark was analyzed with the ERANOS v2.0 code using cross sections based on JENDL-4.0. Calculated results include the multiplication factor, several feedback coefficients, as well as kinetics parameters and the power distribution throughout the core. Where possible, the uncertainty of the calculated parameters is also calculated. Results obtained with ERANOS v2.0 are generally in line with results from other benchmark participants. The energy deposition due to gamma rays in the core is not well calculated. Results with ERANOS v2.0 are generally satisfactory. Recommendations are included. (author)