Radioprotection shielding for neutrons induced by the reaction (²H(40 MeV), ¹²C)

In the framework of design studies for SPIRAL2, the simulation of the neutron flux generated by 40 MeV deuterons on a thick ¹²C target was performed and compared to experimental data. After deuteron stripping, neutrons emerge from the target as a continuous spectrum. The calculation of the dose rate of these neutrons has allowed us to compare four materials being considered for radioprotection shielding: barite, gypsum, ordinary concrete and heavy concrete. The calculated dose rates showed that gypsum and heavy concrete are good materials for the attenuation of very fast neutrons. The simulated map of the neutron dose rate in the production building shows a very high dose rate around the neutron source and in the environment of some of the accelerator equipment