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Information × Registration Number 0220U001363, 0116U005094 , R & D reports Title The physical mechanisms study of radiation-induced degradation of the functional properties of existing and future nuclear-generating complexes of the new generation to ensure the Ukraine energy safety popup.stage_title Head Voyevodin Victor Mykolayovych, Доктор фізико-математичних наук Registration Date 12-03-2020 Organization National Science Center "Kharkiv Institute of Physics & Technology" popup.description2 The Ovruch deposit quartzite is found to be represented by alpha-quartz grains (90% by volume) and semi-amorphous silica cement (10% by volume). It is revealed that the crystalline structure of the original alpha-quartz remains after electron irradiation up to 10 ^ 8 Gy. It has been established that the improvement of the crystalline structure of alpha-quartz when irradiated with electrons in a stream of water is observed at smaller doses (10 ^ 7 Gy) compared to irradiation in air (probably it is so due to the presence of the products of water dissociation - H * and OH* ions). It is found that the density and microhardness of quartzite as a result of irradiation (both in air and water) up to 10 ^ 8 Gy practically don't change. It has been established that during irradiation in the dose range (10 ^ 7-10 ^ 8 Gy), the crystal structure and properties of quartzite don't degrade. This fact indicates the high resistance of this rock to the influence of ionizing radiation by radioactive waste, including the possible long-term (up to 1000 years) contact with groundwater. The studies demonstrate the prospect of using natural quartzite as a geological environment for radioactive waste disposal. Experimentally established the dependence of mechanical characteristics of microlamines on the number of their layers and parameters of heat treatment is presented. The mechanism of interrelation between the structure and mechanical characteristics of microlamines and the model of their evolution in the process of thermal treatment of composites are proposed. It was found that at a surface density of 0.4 g / cm^2 copper samples the attenuation coefficient k of the beta-radiation flux exceeds 0.9 (further increase in the surface density does not give a significant increase for k). It was found that the mixture rule cannot be applied to the radiation-protective properties of composites (the radiation protection of the resultant material is not the sum of the components properties). The effect of a sequence of materials with different Z on the attenuation factor k upon electron irradiation was experimentally confirmed. It is established that the properties of multilayer materials Al-Pb with respect to gamma radiation are influenced mainly by the number of layers, not by the increase in their thickness. Product Description popup.authors Ільченко Микола Iванович Березняк Олена Петрiвна Воєводін Віктор Миколайович Колодій Ігор Вікторович Ростова Ганна Юріївна Ходирєва Юлія Сергіївна popup.nrat_date 2020-07-03 Close