Detailed burnup analysis for assemblies of the supercritical light water reactor

For the present design variant of fuel assemblies of the High Performance Light Water Reactor with coolant and moderator in supercritical state assembly and assembly cluster burnup calculations were performed to get information about k-infinity vs. burnup and power distributions for different moderator and coolant states. The analysis was performed in 2D for UOX and MOX fuel by the Monte Carlo code MCNP5 coupled with the burnup code ''ABBRAND'' developed at IKE. The moderator and coolant state parameters were varied according to typical values in coolant and moderator regions of a three pass core. Single assemblies were moved inside a cluster to simulate bending effects due to temperature gradients etc. to get information about the influence on the power distribution. (orig.)