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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">vestift</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-технических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physical-technical series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8358</issn><issn pub-type="epub">2524-244X</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8358-2022-67-1-65-74</article-id><article-id custom-type="elpub" pub-id-type="custom">vestift-722</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>ЭНЕРГЕТИКА, ТЕПЛО- И МАССООБМЕН</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>POWER ENGINEERING, HEAT AND MASS TRANSFER</subject></subj-group></article-categories><title-group><article-title>Моделирование процесса смешения теплоносителя в опускном участке и напорной камере смешения ВВЭР-1200 (В-491)</article-title><trans-title-group xml:lang="en"><trans-title>Modeling the process of mixing the coolant in the lower section and pressure mixing chamber of VVER-1200 (V-491)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4716-6123</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чорный</surname><given-names>А. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Chorny</surname><given-names>A. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чорный Андрей Дмитриевич – кандидат физико-математических наук, доцент, заведующий лабораторией турбулентности</p><p>ул. П. Бровки, 15, 220072, Минск</p></bio><bio xml:lang="en"><p>Andrei D. Chorny – Ph. D. (Physics and Mathematics), Associate Professor, Head of the Turbulence Laboratory</p><p>15, P. Brovka Str., 220072, Minsk </p></bio><email xlink:type="simple">anchor74@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2979-5284</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Михеенко</surname><given-names>С. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Mikheenko</surname><given-names>S. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михеенко София Дмитриевна – младший научный сотрудник сектора анализа эксплуатационного опыта отдела ядерной безопасности</p><p>ул. Шпилевского, 59-7Н, 220067, Минск</p></bio><bio xml:lang="en"><p>Safiya D. Mikheyenka – Junior Researcher of the Operational Experience Analysis Sector of the Nuclear Safety Department</p><p>59-7N, Shpilevsky Str., 220067, Minsk </p></bio><email xlink:type="simple">mikheyenka@bcnrs.by</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3251-3647</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сперанский</surname><given-names>Ф. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Speransky</surname><given-names>P. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сперанский Филипп Александрович – научный сотрудник</p><p>ул. Бобруйская, 11, 220006, Минск</p></bio><bio xml:lang="en"><p>Philip A. Speransky – Research Assistant</p><p>11, Bobruiskaya Str., 220006, Minsk </p></bio><email xlink:type="simple">PhilSA2.71@gmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2069-3153</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мостовенко</surname><given-names>А. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Mostovenko</surname><given-names>A. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мостовенко Андрей Леонидович – и. о. директора</p><p>ул. Шпилевского, 59-7Н, 220067, Минск</p></bio><bio xml:lang="en"><p>Andrey L. Mostovenko – Acting Director</p><p>59-7N, Shpilevsky Str., 220067, Minsk </p></bio><email xlink:type="simple">mostovenko@bcnrs.by</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7705-9893</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Крысин</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Krysin</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Крысин Александр Иванович – заведующий сектором эксплуатационного опыта отдела ядерной безопасности</p><p>ул. Шпилевского, 59-7Н, 220067, Минск</p></bio><bio xml:lang="en"><p>Alexander I. Krysin – Head of the Operational Experience Sector of the Nuclear Safety Department</p><p>59-7N, Shpilevsky Str., 220067, Minsk </p></bio><email xlink:type="simple">krysin@bcnrs.by</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4413-8904</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Баранова</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Baranova</surname><given-names>T. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Баранова Татьяна Анатольевна – научный сотрудник лаборатории турбулентности</p><p>ул. П. Бровки, 15, 220072, Минск</p></bio><bio xml:lang="en"><p>Tatiana A. Baranova – Researcher of the Laboratory of Turbulence</p><p>15, P. Brovka Str., 220072, Minsk </p></bio><email xlink:type="simple">bartat@tut.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1219-6373</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жукова</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhukova</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Жукова Юлия Владимировна – кандидат физико-математических наук, доцент, ведущий научный сотрудник лаборатории турбулентности</p><p>ул. П. Бровки, 15, 220072, Минск</p></bio><bio xml:lang="en"><p>Yulia V. Zhukova – Ph. D. (Physics and Mathematics), Associate Professor, Leading Researcher of the Laboratory of Turbulence</p><p>15, P. Brovka Str., 220072, Minsk </p></bio><email xlink:type="simple">julia_zhukova@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5824-3473</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кухарчук</surname><given-names>И. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Kukharchuk</surname><given-names>I. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кухарчук Игорь Григорьевич – научный сотрудник лаборатории турбулентности</p><p>ул. П. Бровки, 15, 220072, Минск</p></bio><bio xml:lang="en"><p>Ihar G. Kukharchuk – Researcher of the Laboratory of Turbulence</p><p>15, P. Brovka Str., 220072, Minsk </p></bio><email xlink:type="simple">doomer1979@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт тепло- и массообмена имени А. В. Лыкова Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>A. V. Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Центр по ядерной и радиационной безопасности</institution></aff><aff xml:lang="en"><institution>Center for Nuclear and Radiation Safety</institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Институт ядерных проблем Белорусского государственного университета</institution></aff><aff xml:lang="en"><institution>Institute for Nuclear Problems of Belarusian State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>07</day><month>04</month><year>2022</year></pub-date><volume>67</volume><issue>1</issue><fpage>65</fpage><lpage>74</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Чорный А.Д., Михеенко С.Д., Сперанский Ф.А., Мостовенко А.Л., Крысин А.И., Баранова Т.А., Жукова Ю.В., Кухарчук И.Г., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Чорный А.Д., Михеенко С.Д., Сперанский Ф.А., Мостовенко А.Л., Крысин А.И., Баранова Т.А., Жукова Ю.В., Кухарчук И.Г.</copyright-holder><copyright-holder xml:lang="en">Chorny A.D., Mikheenko S.D., Speransky P.A., Mostovenko A.L., Krysin A.I., Baranova T.A., Zhukova Y.V., Kukharchuk I.G.</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://vestift.belnauka.by/jour/article/view/722">https://vestift.belnauka.by/jour/article/view/722</self-uri><abstract><p>Определен наиболее представительный аварийный сценарий и разработана физико-математическая модель для исследования смешения неизотермических потоков теплоносителя в конструктивных элементах реакторной установки В-491 (ВВЭР-1200), в которой движение среды описывается в трехмерной нестационарной постановке. Исходя из аналитических оценок перечня исходных событий, выбран сценарий с подключением неработающей петли главного циркуляционного трубопровода к трем работающим без предварительного снижения мощности. Разработаны расчетная методика и численный метод для анализа выбранного аварийного сценария и обоснования безопасности эксплуатации реакторной установки В-491 (ВВЭР-1200). При проведении численного моделирования использован метод RANS, заключающийся в решении осредненных по Рейнольдсу уравнений Навье–Стокса, уравнения неразрывности и уравнения энергии. Для замыкания уравнений использована SST k–ω модель турбулентности Флориана Ментера. Проведена верификация разработанной физико-математической модели и процедуры расчета посредством моделирования теплогидравлических процессов в моделях как с относительно простой геометрической конструкцией (тройниковое соединение), так и в масштабной модели корпуса реактора (эксперимент ROCOM), включающего опускной участок и напорную камеру смешения. Показано качественное согласование численных результатов моделирования с доступными данными физических экспериментов. Представлены результаты численного моделирования процесса смешения неизотермических потоков теплоносителя на участке от патрубка «холодной» нитки главного циркуляционного трубопровода до нижней границы топлива активной зоны ВВЭР-1200 (В-491). Показано, что неоднородность в распределении температуры на входе в активную зону проявляется до 15,5 с расчетного аварийного сценария. При выполнении вычислений использовалась связка специализированных расчетных средств Ansys Fluent/Rainbow-TPP.</p></abstract><trans-abstract xml:lang="en"><p>The most representative accident scenario is determined and a physical and mathematical model is developed for studying the mixing of non-isothermal coolant flows in the structural elements of the V-491 reactor facility (VVER-1200), in which the motion of the medium is described in a three-dimensional non-stationary formulation. Based on the analytical estimates of the list of initiating events, a scenario was chosen with the connection of an idle loop of the main circulation pipeline to three operating ones without a preliminary power reduction. A computational algorithm and a numerical method have been developed for the computational analysis of the selected accident scenario and the justification of the safety of operation of the V-491 reactor facility (VVER-1200). During the numerical simulation, the RANS method was used, which consists in solving the Reynolds-averaged Navier–Stokes equations, the continuity equation and the energy equation. The SST k–ω model of turbulence by Florian Menter is used to close the equations. The verification of the developed physical and mathematical model and calculation procedure was carried out by modeling thermohydraulic processes in models with both a relatively simple geometric design (tee connection) and in a scale model of the reactor vessel (ROCOM experiment), including a lowering section and a pressure mixing chamber. The qualitative agreement of the numerical simulation results with the available data of physical experiments is shown. The results of numerical simulation of the mixing process of non-isothermal coolant flows in the section from the branch pipe of the “cold” thread of the main circulation pipeline to the lower boundary of the fuel of the VVER-1200 core (V-491) are presented. It is shown that the heterogeneity in the temperature distribution at the entrance to the core manifests itself up to 15.5 s of the calculated accident scenario. For calculations the following code coupling were used: Ansys Fluent/Rainbow-TPP.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ядерная безопасность</kwd><kwd>водо-водяной энергетический реактор</kwd><kwd>смешение</kwd><kwd>неизотермические потоки теплоносителя</kwd><kwd>CFD-моделирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nuclear safety</kwd><kwd>pressurized water type reactor</kwd><kwd>coolant mixing</kwd><kwd>non-isothermal flow</kwd><kwd>CFD-modeling</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">Андрушечко, С. А. АЭС с реактором типа ВВЭР-1000. От физических основ эксплуатации до эволюции проекта / С. А. Андрушечко, А. М. Афров, Б. Ю. Васильев. – М.: Логос, 2010. – 604 с.</mixed-citation><mixed-citation xml:lang="en">Andrushechko S. A., Afrov A. M., Vasiliev B. Yu. NPP with a WWER-1000 Type Reactor. 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