POSSIBILIITY OF URANIUM EXTRACTION FROM SPENT NUCLEAR FUEL IN FUSED ELECTROLITES CONTAINING RARE ELEMENTS
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
POSSIBILIITY OF URANIUM EXTRACTION FROM SPENT NUCLEAR FUEL IN FUSED ELECTROLITES CONTAINING RARE ELEMENTS
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| Автор |
Nikitin, D. I.
Polovov, I. B. Rebrin, O. I. |
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| Тематика |
CATHODE CURRENT DENSITY
ELECTROLYTIC EXTRACTION ELECTROREFINING MODEL SPENT NUCLEAR FUEL SPENT NUCLEAR FUEL PROCESSING URANIUM ALLOYS |
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| Описание |
The relevance of the research is caused by the plans of using electrolytic separation of metalized spent nuclear fuel as a stage in pyrochemical reprocessing of mixed nitride uranium-plutonium fuel. The main aim is to determine the parameters of uranium electrolytic separation from an alloy with simulators of fission products (precious metals and rare earth elements) simulating spent nuclear fuel in salt mixtures based on 3LiCl–2KCl with additives of rare earth element chlorides. Objects: model spent nuclear fuel – uranium alloy with simulators of fission product (precious metals and rare earth elements) with a mass compound of Pd:Ru:Ag:Rh=25:1:3:3, Nd:Ce:La:Pr:Sm:Y=15:10:5:5:5:1). Methods: electrorefining, X-ray fluorescence and X-ray diffraction method of analysis, inductively coupled plasma mass spectrometry, assessment of distribution of components in the system. Results. The data obtained showed that uranium deposits have dendrite formations of alpha-uranium at 550 °C in orthorhombic crystal system toward needle cathode current density. The resulting cathode deposits are free from impurities of ruthenium, rhodium, molybdenum, praseodymium and yttrium. The purification coefficient for palladium reaches 3000, and for silver 1700. Noble metals accumulate in the anode sludge, and even with the complete depletion of the anode material. The concentration of noble metals in the cathode deposit does not exceed 0,0015 wt %. Despite the high concentration of rare-earth chlorides in the electrolyte, which simulates the accumulation of rare-earth ions during repeated reprocessing of spent nuclear fuel, the concentration of rare-earth metals in the cathode product did not exceed 0,007 wt %. During uranium electrowinning from a model spent nuclear fuel in the 3LiCl–2KCl–UCl3 electrolyte (10,1 wt %) with REE chlorides, which imitate their accumulation in the electrolyte during repeated processing, at 550 °C, as well as the initial cathode current density of 0,2 A/cm2, the specific amount of electricity is 1,0 A∙h/cm2. A cathode uranium deposit is released with a current efficiency exceeding 90 % with all anode mass depletion, and purification coefficient 1800 for the sum of precious metals and for the sum of rare earth metals. © 2023 Tomsk Polytechnic University, Publishing House. All rights reserved.
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| Дата |
2024-04-05T16:37:22Z
2024-04-05T16:37:22Z 2023 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) |info:eu-repo/semantics/publishedVersion |
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| Идентификатор |
Никитин, ДИ, Половов, ИБ & Ребрин, ОИ 2023, 'ВОЗМОЖНОСТЬ ИЗВЛЕЧЕНИЯ УРАНА ИЗ ОТРАБОТАВШЕГО ЯДЕРНОГО ТОПЛИВА В РАСПЛАВЛЕННЫХ ЭЛЕКТРОЛИТАХ, СОДЕРЖАЩИХ РЕДКИЕ ЭЛЕМЕНТЫ', Известия Томского политехнического университета. Инжиниринг георесурсов, Том. 334, № 10, стр. 210-218. https://doi.org/10.18799/24131830/2023/10/4183
Никитин, Д. И., Половов, И. Б., & Ребрин, О. И. (2023). ВОЗМОЖНОСТЬ ИЗВЛЕЧЕНИЯ УРАНА ИЗ ОТРАБОТАВШЕГО ЯДЕРНОГО ТОПЛИВА В РАСПЛАВЛЕННЫХ ЭЛЕКТРОЛИТАХ, СОДЕРЖАЩИХ РЕДКИЕ ЭЛЕМЕНТЫ. Известия Томского политехнического университета. Инжиниринг георесурсов, 334(10), 210-218. https://doi.org/10.18799/24131830/2023/10/4183 2500-1019 Final All Open Access, Gold https://www.scopus.com/inward/record.uri?eid=2-s2.0-85179101644&doi=10.18799%2f24131830%2f2023%2f10%2f4183&partnerID=40&md5=fdb40bbdb6204bab7e483d12d2b771ce https://izvestiya.tpu.ru/archive/article/download/4183/3066 http://elar.urfu.ru/handle/10995/131032 54798177 10.18799/24131830/2023/10/4183 85179101644 001110204000003 |
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| Язык |
ru
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| Права |
Open access (info:eu-repo/semantics/openAccess)
cc-by-nc https://creativecommons.org/licenses/by-nc/4.0/ |
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| Формат |
application/pdf
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| Издатель |
Tomsk Polytechnic University, Publishing House
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| Источник |
Bulletin of the Tomsk Polytechnic University Geo Assets Engineering
Bulletin of the Tomsk Polytechnic University, Geo Assets Engineering |
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