Simulation of radiation properties of Al(wt. %30 B4C) and polyethylene-7%B composites used for shield of thermal neutrons

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عنوان دوره: اولین دوره بین المللی و بیست و هشتمین دوره ملی (1400)
The aim of this study is to compare the neutron absorption properties of composites made of Al(wt.%30 B4C), fabricated in this study through hot pressing process, with borated polyethylene (PE+%7B). Powders of Aluminum and B4C were milled by a planetary mill machine. Then mixed powder was sintered by hot pressing machine at different temperatures. The experimental test was carried out through Neutron radiography. The simulation was performed by MCNP code. The results showed that at equal neutron attenuation intensities, Al(wt.%30 B4C) composite is equivalent to the PE+%7B with half of the thickness. It was found that the composite with uniform distribution of boron carbide particles and higher density has a higher neutron shield property. At low thicknesses, the simulation and practical results confirmed each other and the Al-30% B4C composite has a better neutron-protective behavior than polyethylene-7%B.
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