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The polymethacrylate additives with enhanced functionality were obtained in this work. The influence of the concentration of the additives on the viscosity-temperature, depressor and anti-wear properties of industrial oil I-20A were studied. The obtained lubricant can be used for friction reduction and wear protection of equipment elements of power plants. Кеуwordslauryl methacrylate, methyl acrylate, polymethacrylate additive, alloyed industrial lubricant I-20A, operational properties.
Operating conditions were analyzed, thermophysical characteristics were calculated as applied to VVER-1000 fuel rods in four-year cycle for unified core.Models for calculating gas release, pressure of gases within fuel rod cladding, fuel swelling and thermal conductivity, fuel-cladding gap conductance are briefly described. The thermophysical condition of fuels in a reactor core is one of the main factors that determine their serviceability. The stress-strained condition of fuel claddings under design operating conditions is closely related to fuel rod temperature, swelling, gas release from fuel pellets and the mode in which they change during the cycle and transients. Aside from this, those parameters are an independent goal of studies since their ultimate values are governed by the system of design criteria.
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