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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">cvmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия вузов. Цветная металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Non-Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-3438</issn><issn pub-type="epub">2412-8783</issn><publisher><publisher-name>НИТУ МИСИС</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0021-3438-2022-2-33-42</article-id><article-id custom-type="elpub" pub-id-type="custom">cvmet-1356</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Металлургия цветных металлов</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Metallurgy of Non-Ferrous Metals</subject></subj-group></article-categories><title-group><article-title>ВЯЗКОСТЬ РАСПЛАВЛЕННЫХ СОЛЕЙ НА ОСНОВЕ СИСТЕМЫ LiF–BeF2</article-title><trans-title-group xml:lang="en"><trans-title>Viscosity of molten salts based on the LiF–BeF2 system</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ткачева</surname><given-names>О. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Tkacheva</surname><given-names>O. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ткачева О.Ю. – докт. хим. наук, вед. науч. сотрудник лаборатории электродных процессов; профессор кафедры технологии электрохимических производств </p><p>620990, г. Екатеринбург, ул. Академическая, 20; 620002, г. Екатеринбург, ул. Мира, 19 </p></bio><bio xml:lang="en"><p>Tkacheva O.Yu. – Dr. Sci. (Chem.), Leading researcher of the Laboratory of electrode processes; Professor of the Department of technology of electrochemical processes</p><p>620990,  Ekaterinburg, Akademicheskaya str. 20; 620002, Russia, Ekaterinburg, Mira str., 19</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Руденко</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Rudenko</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Руденко А.В. – науч. сотрудник лаборатории электрокристаллизации и высокотемпературной гальванотехники  </p></bio><bio xml:lang="en"><p>Rudenko A.V. – Researcher of the Laboratory of electrocrystallization and high temperature galvanotechnics</p></bio><email xlink:type="simple">lrizonl@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Катаев</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kataev</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Катаев А.А. – канд. хим. наук, науч. сотрудник лаборатории электродных процессов </p></bio><bio xml:lang="en"><p>Kataev A.A. – Dr. Sci. (Chem.), Researcher of the Laboratory of electrode processes</p></bio><email xlink:type="simple">aleksandr_kataev@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мушников</surname><given-names>П. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Mushnikov</surname><given-names>P. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мушников П.Н. – мл. науч. сотрудник лаборатории радиохимии ИВТЭ УрО РАН и лаборатории пирохимических технологий и материалов для закрытого ядерного топливного цикла УрФУ</p></bio><bio xml:lang="en"><p>Mushnikov P.N. – Junior researcher of the Laboratory of radiochemistry; Junior researcher of the Laboratory of pyrochemical technologies and materials for closed nuclear fuel cycle</p></bio><email xlink:type="simple">p.mushnikov@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Холкина</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kholkina</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Холкина А.С. – канд. хим. наук, науч. сотрудник лаборатории радиохимии ИВТЭ УрО РАН и научной лабораторииэлектрохимических устройств и материалов УрФУ</p></bio><bio xml:lang="en"><p>Kholkina A.S. – Cand. Sci. (Chem.), Researcher of the Laboratory of radiochemistry; Researcher of the Scientific laboratory of electrochemical devices and materials</p></bio><email xlink:type="simple">a.kholkina@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зайков</surname><given-names>Ю. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Zaikov</surname><given-names>Yu. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Зайков Ю.П. – докт. хим. наук, профессор, науч. руководитель ИВТЭ УрО РАН, зав. кафедрой технологии электрохимических производств УрФУ</p></bio><bio xml:lang="en"><p>Zaikov Yu.P. – Dr. Sci. (Chem.), Prof., Scientific director ; Head of the Department of technology of electrochemical processes</p></bio><email xlink:type="simple">dir.zaikov@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт высокотемпературной электрохимии (ИВТЭ) УрО РАН; Уральский федеральный университет (УрФУ)&#13;
имени первого Президента России Б.Н. Ельцина</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences  (IHTE UB RAS); Ural Federal University named after B.N. Yeltsin (UrFU)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт высокотемпературной электрохимии (ИВТЭ) УрО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences  (IHTE UB RAS)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>15</day><month>04</month><year>2022</year></pub-date><volume>28</volume><issue>2</issue><fpage>33</fpage><lpage>42</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ткачева О.Ю., Руденко А.В., Катаев А.А., Мушников П.Н., Холкина А.С., Зайков Ю.П., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Ткачева О.Ю., Руденко А.В., Катаев А.А., Мушников П.Н., Холкина А.С., Зайков Ю.П.</copyright-holder><copyright-holder xml:lang="en">Tkacheva O.Y., Rudenko A.V., Kataev A.A., Mushnikov P.N., Kholkina A.S., Zaikov Y.P.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://cvmet.misis.ru/jour/article/view/1356">https://cvmet.misis.ru/jour/article/view/1356</self-uri><abstract><p>Методом ротационной вискозиметрии с использованием высокотемпературного реометра FRS 1600 («Anton Paar», Австрия) получены температурные зависимости динамической вязкости расплавов солей фторидов лития и бериллия, рассматриваемых в качестве кандидатных составов топлива и теплоносителя для жидкосолевого реактора (ЖСР) сжигателя долгоживущих актинидов из отработавшего ядерного топлива водо-водяного энергетического реактора 1000/1200. Применительно к промежуточному и топливному контурам ЖСР исследованы расплавленные солевые смеси 0,66LiF–0,34BeF2 и (0,73LiF–0,27BeF2) + UF4, содержащие 1 и 2 мол.% UF4. Солевые смеси получены методом прямого сплавления компонентов и аттестованы с помощью рентгенофазового и элементного анализов. Выбор параметра «скорость сдвига» (γ) проведен по кривым вязкости, полученным в исследуемых расплавах при температуре 700 °С. Выявлено, что вязкость не зависит от скорости сдвига в интервале γ = 6÷20 с–1. При измерениях температурной зависимости вязкости величина γ составляла 11 с–1. Экспериментально полученные значения вязкости расплавов LiF–BeF2–UF4 в температурном интервале от ликвидуса до 800 °С описываются линейным уравнением lgη = a + b/t, однако их температурные коэффициенты заметно отличаются, что указывает на существенную зависимость вязкости этих расплавов от состава и температуры. Полученные значения вязкости расплава 0,66LiF–0,34BeF2 согласуются с известными литературными данными в пределах 7–10 % в температурном интервале 650–750 °С. С увеличением содержания LiF вязкость расплава падает: она на 20 % ниже в расплаве 0,73LiF–0,27BeF2 при t = 650 °С. Однако при добавлении в него 2 мол.% UF4 при этой же температуре вязкость топливной соли 0,73LiF–0,27BeF2 + + UF4 возрастает на 10 %</p></abstract><trans-abstract xml:lang="en"><p>Rotational viscometry with the FRS 1600 (Anton Paar, Austria) high-temperature rheometer was used to obtain temperature dependences of the dynamic viscosity of molten lithium and beryllium fluoride salts considered as candidate fuel and coolant compositions for the molten salt reactor (MSR) for burning long-lived actinides from the spent nuclear fuel of the PWR 1000/1200 pressurized water reactor. 0.66LiF–0.34BeF2 and (0.73LiF–0.27BeF2)+UF4 molten salt mixtures containing 1 and 2 mol.% UF4 were investigated with regard to the MSR intermediate and fuel circuits. Salt mixtures were prepared by the direct melting of components and certified using X-ray phase and elemental analysis. The «shear rate» parameter was selected according to the viscosity curves obtained in the studied melts at 700 °C. It was found that the viscosity does not depend on the shear rate in the range of γ = 6÷20 s–1. When measuring the temperature dependence of viscosity, the shear rate was 11 s–1. Viscosity values of LiF–BeF2–UF4 melts obtained from experiments in the temperature range from liquidus to 800 °C are described by the linear equation logη = a + b/t, but their temperature coefficients differ evidently, which indicates a significant dependence of the viscosity of these melts on composition and temperature. Viscosity values obtained for the 0.66LiF–0.34BeF2 melt agree with the available literature data within 7–10 % in the temperature range of 650–750 °C. With an increase in the LiF content, melt viscosity decreases: it is lower by 20 % in the 0.73LiF–0.27BeF2 melt at t = 650 °C. However, when 2 mol.% UF4 is added, the 0.73LiF–0.27BeF2+UF4 fuel salt viscosity increases by 10 % at the same temperature.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>динамическая вязкость</kwd><kwd>ротационная вискозиметрия</kwd><kwd>скорость сдвига</kwd><kwd>расплавы солей фторидов лития</kwd><kwd>бериллия и урана</kwd><kwd>топливная соль</kwd><kwd>промежуточный теплоноситель</kwd><kwd>жидкосолевой ядерный реактор</kwd></kwd-group><kwd-group xml:lang="en"><kwd>dynamic viscosity</kwd><kwd>rotational viscometry</kwd><kwd>shear rate</kwd><kwd>molten salts of lithium</kwd><kwd>beryllium and uranium fluorides</kwd><kwd>fuel salt</kwd><kwd>intermediate coolant</kwd><kwd>molten salt nuclear reactor</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Williams D.F., Britt P.F. 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