PROSPECTS FOR THE USE OF THORIUM WASTE AS PART OF MONAZITE IN THE ENERGY INDUSTRY

In the context of growing global demand for environmentally friendly and sustainable energy, the use of thorium as a nuclear fuel attracts special attention. This research work is aimed at a comprehensive analysis of the possibilities of processing mining industrial waste containing thorium, with a view to their use in thorium energy. The paper considers the mineral monazite as a key source of thorium formed in the dumps of the gold mining and rare earth industries. Theoretical studies have been conducted aimed at developing mathematical models of the thorium reactor core using the ANSYS and COMSOL Multiphysics software systems. The models take into account the processes of neutron transfer, heat transfer, coolant flow, and mechanical stresses. Physico-chemical methods of thorium extraction from waste have also been investigated in order to minimize environmental risks. Data on the geology and reserves of thorium in Kazakhstan are presented, where promising deposits have been identified, including in the Mangystau region, South Kazakhstan region and North Kazakhstan region. The results of the study emphasize the high technological and environmental feasibility of developing thorium energy in the Republic of Kazakhstan and create a scientific basis for the introduction of fourth-generation thorium-based reactors.

1. Manchanda V.K. Thorium as an abundant source of nuclear energy and challenges in separation science // Radiochimica Acta. – 2023. – T. 111, № 4. – R. 243-263. (In English).

2. Emblemsvag J. Safe, clean, proliferation resistant and cost-effective Thorium-based Molten Salt Reactors for sustainable development // International Journal of Sustainable Energy. – 2022. – T. 41, № 6. – R. 514-537. (In English).

3. Houghton J. Molten Salt Reactors: Overview and Comparison of Uranium and Thorium Fuel Cycles. – 2020. (In English).

4. Li D. TruUtilization and MA transmutation in thorium-based fluorinated molten salt fast reactor / D. Li // Progress in Nuclear Energy. – 2024. – T. 168. – R. 105015. (In English).

5. Occurrence of uranium, thorium and rare earth elements in the environment: A review / K.S. Patel et al // Frontiers in environmental science. – 2023. – T. 10. – R. 1058053. (In English).

6. Aziman E.S. Investigation of thorium separation from rare-earth extraction residue via electrosorption with carbonbased electrode toward reducing waste volume / E.S. Aziman // Nuclear Engineering and Technology. – 2021. – T. 53, № 9. – R. 2926-2936. (In English).

7. A safer and cleaner process for recovering thorium and rare earth elements from radioactive waste residue / J. Su et al // Journal of Hazardous Materials. – 2021. – T. 406. – R. 124654. (In English).

8. Aziman E.S. Remediation of thorium (IV) from wastewater: Current status and way forward / E.S. Aziman, A.H.J. MohdSalehuddin, A.F. Ismail // Separation & Purification Reviews. – 2021. – T. 50, № 2. – R. 177-202. (In English).

9. Thorium resources as Co- and By-products of rare earth deposits. – IAEA-Tecdoc-1892, Vienna, 2019, 68 p. (In English).

10. Kelley D.D. The US Department of Energy (DOE) is considering a proposal to operate an integrated pit disassembly and conversion demonstration process at the Los Alamos National Laboratory (LANL) / D.D. Kelley // DOE has prepared an Environmental Assessment, Pit Disassembly and Conversion Demonstration (DOE/EA-1207). (In English).

11. The chemistry of the actinide and transactinide elements / M.S. Wickleder et al. – 2006. – R. 52-160. (In English).

12. Ligun A., Afroz N. Radioactive Waste. – 2023. (In English).

13. Thorium resources as Co- and By-products of rare earth deposits. IAEA-Tecdoc-1892. – Vienna, 2019. – 68 p. (In English).

14. Mezhdunarodnoe agentstvo po atomnoi ehnergii (2023). Informatsionnaya Sistema ehnergeticheskikh reaktorov – v ehkspluatatsii i priostanovlennaya ehkspluatatsiya. Dostupno onlain: https://pris.iaea.org/PRIS/WorldStatistics/OperationalReactorsByCountry.aspx (data obrashcheniya: 05.01.2023). (In Russian).

15. Understanding rare earth elements as critical raw materials / W.L. Filho et al // Sustainability. – 2023. – T. 15, № 3. – R. 1919. (In English).

16. Thorium: geology, occurrence, deposits and resources / Barthel F.H. et al // International Symposium on Uranium Raw MAterial for the Nuclear Fuel Cycle: Exploration, Mining, Production, Supply and Demand, Economics and Environmental Issues (URAM 2014). – Vienna. Proceedings. – 2014. (In English).

17. Chemical and mineralogical characterization of Malaysian monazite concentrate / S. Udayakumar et al // Mining, Metallurgy & Exploration. – 2020. – T. 37. – R. 415-431. (In English).

18. Balaram V. Sources and applications of rare earth elements / V. Balaram // Environmental Technologies to Treat Rare Earth Elements Pollution: Principles and Engineering; IWA Publishing: London, UK. – 2022. – R. 75-113. (In English).

19. Quantification of thorium and rare earth elements in Perak’s ex-mining monazite / C.R.C. Hak et al // JurnalSainsNuklear Malaysia. – 2020. – T. 32, № 1. – R. 10-19. (In English).

20. REE and Th potential from placer deposits: a reconnaissance study of monazite and xenotime from Jerai pluton, Kedah, Malaysia / F.A. Fauzi et al // Thai Geoscience Journal. – 2021. – T. 2, № 2. – R. 43-60. (In English).

21. Suwannapura V. The Influence of Rare Earth Elements on Thermal Infrared Spectra of Monazite: University of Twente, 2024. (In English).

22. Singer D.A. Long-Term Copper Production to 2100 / D.A. Singer // Mathematical Geosciences. – 2024. – T. 56, № 4. – R. 711-722. (In English).

23. Phillips N. Formation of gold deposits. – Singapore: Springer, 2022. – T. 10. (In English).

24. A responsible mining approach to the economic modeling of small-scale gold mining / O.M.S. Nico et al // World Development Perspectives. – 2024. – T. 33. – R. 100561. (In English).

25. Chitadze N. World Natural Resources and Their Impact on the Environmental Conditions of Our Planet / N. Chitadze // Perspectives on Ecological Degradation and Technological Progress. – IGI Global, 2023. – R. 42-78. (In English).

26. Meißner S. The impact of metal mining on global water stress and regional carrying capacities— a GIS-based water impact assessment / S. Meißner // Resources. – 2021. – T. 10, № 12. – R. 120. (In English).

27. Global carbon dioxide removal potential of waste materials from metal and diamond mining / L.A. Bullock et al // Frontiers in Climate. – 2021. – T. 3. – R. 694175. (In English).

28. Yıldız T.D. How can the state rights be calculated by considering a high share of state right in mining operating costs in Turkey? / T.D. Yıldız // Resources Policy. – 2022. – T. 75. – R. 102509. (In English).

29. The implication of thorium fraction on neutronic parameters of pebble bed reactor / Z. Zuhair et al // Kuwait Journal of Science. – 2021. – T. 48, № 3. (In English).

30. The absence of metamictisation in natural monazite / L. Nasdala et al // Scientific reports. – 2020. – T. 10, № 1. – R. 14676. (In English).

31. Monazite-type SmPO4 as potential nuclear waste form: insights into radiation effects from ionbeam irradiation and atomistic simulations / J.M. Leys et al // Materials. – 2022. – T. 15, № 10. – R. 3434. (In English).

32. Review of rare-earth phosphate materials for nuclear waste sequestration applications / M.R. Rafiuddin et al // ACS omega. – 2022. – T. 7, № 44. – R. 39482-39490. (In English).

33. Zglinicki K. Monazite-bearing post processing wastes and their potential economic significance / K. Zglinicki, K. Szamałek, G. Konopka // gospodarkasurowcamimineralnymi. – 2020. – T. 36. (In English).

34. Chemical and mineralogical characterization of Malaysian monazite concentrate / S. Udayakumar et al // Mining, Metallurgy & Exploration. – 2020. – T. 37. – R. 415-431. (In English).

35. Annan C.A. Mineralogical and geochemical characterisation of monazite placers in the neufchâteau syncline (Belgium). – 2021. (In English).

36. Echeverry-Vargas L. Recovery of light rare earth elements, cerium, lanthanum, and neodymium from alluvial gold mining waste from the Bagre-Nechí mining district in Colombia using acid leaching, oxalate precipitation and calcination / L. Echeverry-Vargas, N.R. Rojas-Reyes, L.M. OcampoCarmona // Hydrometallurgy. – 2023. – T. 216. – R. 106009. (In English).

37. Abaka-Wood G.B. The use of mining tailings as analog of rare earth elements resources: Part 1–characterization and preliminary separation / G.B. Abaka-Wood, J. Addai-Mensah, W. Skinner // Mineral Processing and Extractive Metallurgy Review. – 2022. – T. 43, № 6. – R. 701-715. (In English).

38. Prayogo D. Identification of Mineral Zircon (ZrSiO4) Rare Earth Metal (REM) As Smart Material for Electric Tactical Motor Bike Battery / D. Prayogo, R. Murniati, C. Likitaporn // International Journal of Applied Mathematics, Sciences, and Technology for National Defense. – 2024. – T. 2, № 1. – R. 29-36. (In English).

39. Kazakhstan mozhet stat' osnovnym postavshchikom toriya 28 maya 2014 altaynews.kz https://www.atomic-energy.ru/news/2014/05/28/49202. (In Russian).

40. Rossypi zolota Kazakhstana / X.A. Bespaev i dr. // Spravochnik Almaty, 1999, 228 s. (In Russian).

41. Ermұkhanbetov E.E. Veshchestvennyi sostav vmeshchayushchikh porod i korennykh rud na mestorozhdenii Verkhnii Irgiz / E.E. Ermұkhanbetov, M.K. Kembaev // trudy Satpaevskikh chtenii «Satpaevskie chteniya – 2020» Almaty 2020. S.27-30. (In Russian).

42. Eekrasoba R.L. Kularit – autigennaya raznovidnost' monatsita / R.L. Eekrasoba, E.E. Eekrasob // DAN. – 1983. – T. 268. – S. 688-693. (In Russian).

43. O vozmozhnosti sozdaniya redkozemel'noi otrasli v RK zhurnale «Promyshlennost' KazakhstanA», №5, oktyabr' 2008 g.) MadalINaimanbaev https://proza.ru/2009/02/05/425. (In Russian).