FLUKA Monte Carlo Assessment of Fe₂B-Based Shielding Materials for Secondary Neutrons in a 1000 MeV Proton Accelerator
DOI:
https://doi.org/10.22399/ijcesen.4544Keywords:
Neutron shielding, FLUKA, Dose distribution, FerroboronAbstract
High-energy proton accelerators generate high-energy neutrons through spallation processes, and these neutrons represent one of the most challenging particle types in terms of radiation shielding. In this study, secondary neutron dose distributions in the tunnel air environment at different distances and within the surrounding shielding structures were calculated for a 1000 MeV proton accelerator using FLUKA Monte Carlo simulations. Standard concrete, ferroboron (Fe₂B), and concrete doped with 20% Fe₂B were considered as shielding materials, and their shielding performances at various thicknesses were comparatively evaluated. The simulation results demonstrate that Fe₂B provides superior shielding performance compared to standard concrete and 20% Fe₂B-doped concrete, owing to its high effectiveness in moderating fast neutrons and absorbing thermal neutrons. In addition, an increase in shielding thickness was found to significantly reduce the measured dose levels. The findings indicate that Fe₂B-based materials constitute an effective and viable alternative for optimized shielding design in high-energy proton accelerator facilities
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