An ADS irradiation facility for fast and slow neutrons

We studied a flexible ADS-based irradiation facility with fast neutrons inside the core and slow neutrons in the composite reflector containing light materials. The fast reactor core has been designed using MCNP-6 code with a mixed reflector formed by three concentric cylindrical layers (lead+graphite+lead) in order to have different neutrons spectra to perform various types of measurements without perturbing the ADS core fast characteristics. We also included in the ADS design three irradiation points external to the core, in positions such to have different neutron spectra, for measurements to be performed out of the ADS system. Moreover, we performed a thermal-hydraulic assessment of the behavior of target and core cooling systems. In order to investigate the capabilities of the system, we studied different kinds of possible measurements that could be performed in various positions, both inside and outside the ADS.