Institut de recherche sur les lois fondamentales de l'Univers

EURISOL DS project aims at the design of the next generation European RIB facility able to deliver secondary beams 1013 pps at energy up to 150 MeVu-1. The intense beam as well the accessibility to heavier nuclear system will provide many new opportunities opening a wide field for physicists. The purpose of the presentation is to give an overview of the work carried out within Task#5 “Safety and Radioprotection” and Task#11 “Beam Intensity Calculations” with special emphasis to the main issues and conclusions derived. Benchmark studies were performed initially in order to verify the accurate description of the reaction models used by the MCNPX and PHITS codes and to choose the best options to be used for the present work requirements. The predictions of the code tested against measured data are briefly presented. Radiological characterisation of the Multi MW target station is further reported: sizing of the shielding, magnitude of the activation vector and it spatial distribution map, classification of the radioactive wastes generated at the shut-down of the facility, source term of the contaminant migration. Lay-out of the heavy ion postaccelerator design is also described. Dedicated safety & radioprotection studies were carried-out for the optimisation of the linac shielding and the characterisation of the radiation environment inside the tunnel, the design of the beam dumps and their associated shielding. The experimental hall hosting the AGATA germanium array detector was selected as the conservative case to configure the shielding and the management of the access to the controlled areas. The fission yields estimates together with the characterization of the residual activity in the actinide fission modules of the MMW target station are finally reported.