Benchmark experiments of accelerator-driven systems (ADS) in Kyoto university critical assembly (KUCA)

The ADS benchmark problems in the KUCA were based on both the 14-MeV neutrons generated from pulsed neutron generator and 150-MeV protons generated from the FFAG accelerator. Among the benchmark problems, the valuable and important information on the neutron spectrum measurement of 14-MeV neutrons using the foil activation method was described. The experiments and the numerical analyses by MCNP-4C2 with ENDF/B-VI.2 revealed that the 27Al foil was experimentally confirmed to be one of suitable activation foils for obtaining the neutron spectrum information in the ADSR. For the high-energy protons generated from FFAG accelerator, the foil activation method was found to be a useful measuring technique for examining the neutron spectrum of the ADSR through the reaction rates obtained by MCNPX with LA150 and the unfolding analyses by SANDII with ENDh/B-V1.2. (authors)