Benchmark on Beam Interruptions in an Accelerator-driven System: Final Report on Phase II Calculations

A second phase of benchmark calculations is proposed for the Beam Interruptions in a Lead-bismuthcooled and MOX-fuelled Accelerator-driven System computational problem. This second phase of calculations aims to extend the beam interruption investigation to prototypical ADSs characterised by larger fuel power densities. To this aim, the computational benchmark is no longer limited to an XADS-type system, but has been extended to include a MYRRHA ADS-type. Moreover, this second phase of calculations will investigate the impact on the fuel and coolant temperature results of different assumptions relevant to heat transfer correlations, material properties, fuel channel geometry or any other thermal-hydraulic calculation assumption. A further benchmark extension specifically devoted to irradiated fuel conditions is foreseen in the near future.