Speaker
Description
Neutron shielding calculations have complex challenges that require conservative planning in designing shielding to meet radiation protection standards. Formerly, hydrogenous materials such as concrete, water, and polyethylene have been chosen to against neutron radiation. However, in high energy neutron sources, the use of these materials will require a very thick shielding design so that it has an impact on increasing the footprint and cost requirements. Therefore, in this paper, a multi-layer shielding scenario will be modelled for high-energy neutron sources using metal and hydrogenous materials such as Fe, Cu, concrete, and borated polyethylene. Parameter data from simulation results are distribution of neutron flux, spectrum energy, neutron depth dose, and ambient dose H(10) equivalent. The simulation results show that Cu has the best effectiveness in attenuating high-energy neutrons even though it has the highest build-up factor value. Meanwhile, the multilayer combination of Fe-Fe-BPE and Fe-concrete-BPE provides the best choice compared to other material combination scenarios with the lowest flux values and ambient dose H(10) equivalent.