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Information × Registration Number 0126U000813, R & D request Title Development, calculation of parameters, research and testing to substantiate the increase in reliability and performance of elements in the form of fuel rods, absorber rods under normal operating conditions, design and severe accidents of the cores of VVER and PWR reactors, which are operated and planned for commissioning in the structure of the nuclear power industry of Ukraine Head Volodymyr S. Krаsnorutskyi, Кандидат фізико-математичних наук Registration Date 26-01-2026 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description1 1. Development of process operations for manufacturing pellet fuel with a gadolinium burnable absorber. Development of methods for determining fuel pellet characteristics. Investigation of uranium-gadolinium fuel characteristics depending on gadolinium content. Performance of calculations and tests to substantiate operability of gadolinium fuel rods. 2. Analysis of data based on the operational experience of fuel rods in the reactor core to develop a list of proven structural materials that can be recommended for use as cladding. Analysis of fuel rod sealing methods used by global nuclear fuel manufacturers. Performance of calculations for preliminary evaluation of changes in rod geometry during long-term operation. Identification of nuclear signatures to identify nuclear material of different enrichment levels obtained through different technological processes—depleted, low-enriched, or high-enriched uranium. 3. Development of new fuel assemblies for the KhNPP-3, 4 VVER-1000 reactor units with different neutronic and thermal-hydraulic characteristics compared to those currently in use. Determination of the design characteristics of the proposed fuel rod design and substantiation of the choice of its materials, type of welded joints, and welding method. Analysis of fuel rod sealing methods used by global nuclear fuel manufacturers. 4. Calculations and analysis of available operational data to determine a list of materials, designs, and manufacturing processes used in the production of absorber rods for further substantiation of their service life/operational characteristics required for the transition to extended fuel cycles. 5. Development of production processes for RCCA absorber rods for VVER-1000 reactors, manufacturing of a batch of RCCA absorber rods. Development of advanced absorber rod designs with metallic hafnium to increase the service life of RCCA popup.nrat_date 2026-01-26 Close