Neutronics Assessment of the Spatial Distributions of the Nuclear Loads on the DEMO Divertor ITER-like Targets: Comparison between the WCLL and HCPB Blanket

The Plasma Facing Components (PFCs) of the divertor target contribute to fundamental functions heat removal and particle exhaust during fusion operation, being subjected a very hostile complex loading environment characterized by intense particles bombardment, high fluxes (HHF), varying stresses loads significant neutron irradiation. development well-designed target, which represents crucial step in realization DEMO, needs assessment all these as accurately possible, provide pivotal data indications for design structural performance prediction PFCs. In particular way, this study is fully devoted comprehension distributions on main nuclear due irradiation, performed first time using an extremely detailed approach. This work has been carried-out considering latest configuration DEMO reactor, including updated ITER-Like PFCs geometry, blanket layout (Water Cooled Lithium Lead—WCLL Helium Pebble Bed—HCPB), thus evaluating impact different concept above-mentioned distributions. Neutronics analyses have with MCNP5 Monte Carlo code JEFF3.3 libraries. 3D MCNP models created, focusing thorough representation PFCs, allowing loads: radiation damage (dpa/FPY), He-production rate (appm/FPY) heating density (W/cm3) total power deposition (MW). These results are presented means 2D maps plots each sub-component both WCLL HCPB case: W-monoblocks, Cu-interlayers\CuCrZr-pipe PFC-CB (Cassette Body) supports made Eurofer steel.