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Information × Registration Number 0222U000917, 0119U101682 , R & D reports Title Impact of radiation on structural and thermophysical properties of materials of 4th generation reactors popup.stage_title Head Bulavin Leonid A., Доктор фізико-математичних наук Registration Date 21-01-2022 Organization Institute for Safety Problems of Nuclear Power Plants of the National Academy of Sciences of Ukraine popup.description2 The aim of the work is to study the influence of radiation on changes in the structural and thermodynamic characteristics of materials of 4th generation reactors (supercritical water, concrete composites) and to determine the causes and mechanisms of these changes. Research methods - computer modeling, theoretical and analytical. Main results - Molecular dynamics methods have been used to study changes in the structural characteristics and thermodynamic properties of a model water system under the influence of radiation under supercritical external conditions. Changes in radial distribution functions are determined. It is established that the change under the action of radiation of thermodynamic properties of water in the supercritical state, as well as the peculiarities of its interaction with structural materials is determined by structural changes in the system. A systematic analysis of the results of existing experimental studies of the effects of neutron and gamma radiation on the structure and mechanical properties of concrete (such as compressive strength, tensile strength in bending, modulus of elasticity, volume change and dimensional change). With the help of neutrophysical Monte Carlo code Serpent developed a three-dimensional model of the core for the first fuel loading of the model water reactor, which includes detectors on the inner layer of concrete biological protection, where the radiation intensity is highest. The neutron flux density at the control points for the construction of two types of concrete (Serpentinite concrete and Serpentinite concrete with the addition of 12% basalt fiber) was calculated and neutron fluence for biological protection for 40 years of reactor operation was calculated. It has been shown for the first time that the addition of basalt-boron fiber to biological protection concrete not only improves the mechanical properties of concrete, but also reduces the destructive effects of neutron fluence. Product Description popup.authors Vlasenko Tetiana S. Golyuk Maryna I. Gulik Volodymyr I. Kudin Eugeniia M. Romanenko Irina Mykolayivna Cherevko Kostyantyn V. popup.nrat_date 2022-03-09 Close