Browsing by Author "Sariyer D."
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Item Neutron shielding properties of concrete and ferro-boron(Polska Akademia Nauk, 2015) Sariyer D.; Küçer R.; Küçer N.The problem of shielding against high-energy neutrons has always attracted a great deal of attention. Neutron shielding requires slowing down energetic neutrons and absorbing with a shield material. Concrete is one of the best known materials for neutron shielding and ferro-boron is described as an alternative shielding material in this study. FLUKA Monte Carlo simulation code was used for the application of shielding calculation. When the simulation results are compared, it is clear that ferro-boron is more effective in neutron shielding than the concrete.Item Development of neutron shielding concrete containing iron content materials(American Institute of Physics Inc., 2018) Sariyer D.; Küçer R.Concrete is one of the most important construction materials which widely used as a neutron shielding. Neutron shield is obtained of interaction with matter depends on neutron energy and the density of the shielding material. Shielding properties of concrete could be improved by changing its composition and density. High density materials such as iron or high atomic number elements are added to concrete to increase the radiation resistance property. In this study, shielding properties of concrete were investigated by adding iron, FeB, Fe2B, stainless - steel at different ratios into concrete. Neutron dose distributions and shield design was obtained by using FLUKA Monte Carlo code. The determined shield thicknesses vary depending on the densities of the mixture formed by the additional material and ratio. It is seen that a combination of iron rich materials is enhanced the neutron shielding of capabilities of concrete. Also, the thicknesses of shield are reduced. © 2018 Author(s).Item Double-layer neutron shield design as neutron shielding application(American Institute of Physics Inc., 2018) Sariyer D.; Küçer R.The shield design in particle accelerators and other high energy facilities are mainly connected to the high-energy neutrons. The deep penetration of neutrons through massive shield has become a very serious problem. For shielding to be efficient, most of these neutrons should be confined to the shielding volume. If the interior space will become limited, the sufficient thickness of multilayer shield must be used. Concrete and iron are widely used as a multilayer shield material. Two layers shield material was selected to guarantee radiation safety outside of the shield against neutrons generated in the interaction of the different proton energies. One of them was one meter of concrete, the other was iron-contained material (FeB, Fe2B and stainless-steel) to be determined shield thicknesses. FLUKA Monte Carlo code was used for shield design geometry and required neutron dose distributions. The resulting two layered shields are shown better performance than single used concrete, thus the shield design could leave more space in the interior shielded areas. © 2018 Author(s).Item Investigation of neutron attenuation through FeB, Fe2B and concrete(Polish Academy of Sciences, 2020) Sariyer D.Neutrons produced in high-energy nuclear facilities are very penetrative and travel deeply through many materials. Neutron shielding slows down the high-energy neutrons to thermal energies and absorbing them with suitable materials is an important problem. Neutron attenuation in the shielding is accomplished through elastic and inelastic scattering reactions. For shielding to be efficient, minimum thickness needs to be achieved. To shield from these neutrons, concrete and iron are important materials. In this study, the neutron attenuation effects through shielding materials (concrete, FeB, and Fe2B) were investigated for various thicknesses of the materials. The high-energy neutrons were generated from the interaction protons with energies of 50–1000 MeV and copper target. Neutron dose rate attenuation curves were determined by using FLUKA Monte Carlo code. The results show that the extent of attenuation related to neutron energy depends on the density and thickness of the shielding material. © 2020 Polish Academy of Sciences. All rights reserved.Item Effect of different materials to concrete as neutron shielding application(Polish Academy of Sciences, 2020) Sariyer D.; Küçer R.Neutron shielding is used to protect personnel and equipment from the effect of neutron radiation. The effective neutron shielding should reduce the neutron energy by elastic and inelastic scattering until they can be absorbed. The interaction of neutron with the matter depends on neutron energy and the density of the shielding material. The best known construction and shielding material is concrete. The composition of concrete has an important effect on its neutron shielding properties. Neutron shielding performance of concrete can be improved by adding different materials such as ferro-boron and iron. In this study, neutron shielding properties of concrete were investigated by adding boron carbide B4C, ferro-boron FeB, and iron Fe in concrete. Neutron dose rate attenuation curves were determined by using FLUKA Monte Carlo code complemented with analytical predictions. The simulation results clearly showed that shielding performance of concrete was enhanced depending on the amounts of additional material and density. © 2020 Polish Academy of Sciences. All rights reserved.