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Information × Registration Number 0225U001927, (0122U001317) , R & D reports Title III-77-22 Development of scientific and technical foundations of effective and safe extraction and processing of uranium and zirconium ores and rational management of radioactive waste popup.stage_title Вдосконалення методів розрахунку параметрів процесів видобутку та переробки уранових і цирконієвих руд та поводження з радіоактивними відходами Head Shevchenko Volodymyr H., Доктор технічних наук Registration Date 11-02-2025 Organization Institute of Geotechnical Mechanics named after MS Polyakova of the National Academy of Sciences of Ukraine popup.description1 Establishing patterns, improving methods, tools and technologies for efficient and safe extraction and processing of uranium and zirconium ores and rational management of radioactive waste popup.description2 Objects of research: examination of geological conditions for uranium and zirconium deposits within the Ukrainian Shield; analysis of rock movement in pipelines influenced by vibroaerodynamic forces; investigation of ionizing radiation interactions with composite materials for radiation-resistant containers; study of zirconium-niobium alloys and hafnium metal quality indicators. Research objectives: identification of ore mineralogical associations related to accumulation conditions; evaluation of rock movement resistance in vibropneumatic transport systems; advancement of sustainable uranium mining methods; enhancement of environmental protection from ionizing radiation; analysis of quality indicators and technological improvements for zirconium and hafnium alloys. A refined equation was developed to assess the resistance coefficient of air mixture movement in pipelines and correlate ring ejector design parameters with operational performance. A mathematical model was established for vibropneumatic transportation of bulk materials and gas dynamics of turbulent jet mixing. A methodology was created to examine surfactant and explosive charge effects on fine dust particle yield, revealing charge design dependencies. The feasibility of producing 99.95% pure zirconium alloys via calcium-thermal reduction of zirconium tetrafluoride is validated. Reactor tests demonstrated that zirconium and hafnium alloys produced through calcine-thermal technology meet standards and are suitable for prolonged reactor testing. Product Description popup.authors Ishchenko Kostiantyn S. Baranov Volodymyr A Bulat Anatolii F. Kliuiev Eduard S. Korovin Vadym Yu. Lysytsia Mykola I. Skipochka Serhii I. Shevchenko Volodymyr H. popup.nrat_date 2025-02-11 Close