Criticality calculations of the HTR-10 pebble-bed reactor with SCALE6/CSAS6 and MCNP5.

Highlights: [•] Comparisons of the HTR-10 criticality calculations with SCALE6/CSAS6 and MCNP5 were performed. [•] The DOUBLEHET unit-cell treatment provides the best k eff estimation among PBR criticality calculations using SCALE6. [•] The continuous-energy SCALE6 calculations present a non-negligible discrepancy with MCNP5 in three PBR cases. [ABSTRACT FROM AUTHOR]