A methodology to a DB-MHR fuel recharge evaluation—A basic comparison between WIMSD-5B and MCNPX codes

The deep burn modular helium reactor (DB-MHR) belongs to the new generation of nuclear power plants. Such reactor presents the possibility to use reprocessed fuels and a special refueled based on shuffling scheme that displaces the fuel pins after each cycle. This work presents a simplified methodology to evaluate qualitatively the shuffling scheme of these reactors using the WIMSD-5B code. The keff behavior during the burnup was verified by the WIMSD-5B and the MCNPX 2.6.0 codes using three types of core geometry. The WIMD-D5 and the MCNP presented very similar results.