A comparison of neutron resonance absorption in thermal reactor lattices in the AUS neutronics code system with Monte Carlo calculations

Abstract

The calculation of resonance shielding by the subgroup method as incorporated in the MIRANDA module of the AUS neutronics code system is compared with Monte Carlo calculatons for a number of thermal reactor lattices. For the large range of single rod and rod cluster lattices considered AUS results for resonance absorption were high by up to two per cent.