Abstract
The use of neutron shielding materials is essential in nuclear reactors to ensure safety and minimize radiation exposure. Conventional materials like lead and concrete pose environmental concerns, leading to the need for more sustainable alternatives. In this study, we have investigated the usage of borated polyethylene as an eco-friendly neutron shielding material using the Monte Carlo simulation code, FLUKA. Borated polyethylene slabs of varying thicknesses were evaluated for neutron attenuation, focusing on key parameters such as mass attenuation coefficient, mean free path, and half-value layer (HVL). Simulation results showed that borated polyethylene achieved a mass attenuation coefficient of 0.150 cm²/g at 0.025 MeV, which is 25% higher than that of conventional concrete. The mean free path for thermal neutrons was 6.67 cm, while the half-value layer was 3.34 cm, indicating effective neutron shielding, especially for thermal neutrons. Increased material thickness led to significant reductions in neutron fluence and transmission, with neutron fluence reduced to 5.0E+5 n/cm² at 15 cm thickness. These findings suggest that borated polyethylene is highly effective in attenuating neutron radiation and offers a more sustainable alternative to traditional materials.
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