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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">npe</journal-id><journal-title-group><journal-title xml:lang="ru">Ядерная физика и инжиниринг</journal-title><trans-title-group xml:lang="en"><trans-title>Nuclear Physics and Engineering</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2079-5629</issn><issn pub-type="epub">2079-5637</issn><publisher><publisher-name>МИФИ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.1134/S2079562920060251</article-id><article-id custom-type="elpub" pub-id-type="custom">npe-198</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>Теоретическая и экспериментальная физика ядерных реакторов</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Theoretical and Experimental Physics of Nuclear Reactors</subject></subj-group></article-categories><title-group><article-title>Сопряженный теплогидравлический и нейтронно-физический расчет ТВС реактора ИР-8 с помощью кодов MCU-PTR/ATHLET</article-title><trans-title-group xml:lang="en"><trans-title>Coupled Thermal-Hydraulic and Neutron-Physical Calculation of IR-8 Reactor’s Fuel Assembly Using MCU-PTR/ATHLET Codes</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>Глыва</surname><given-names>К. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Glyva</surname><given-names>K. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Каширское ш. 31, Москва, 115409</p><p>пл. Академика Курчатова 1, Москва, 123182</p></bio><bio xml:lang="en"><p>Kashirskoe sh. 31, Moscow, 115409</p><p>pl. Akademika Kurchatova 1, Moscow, 123182</p></bio><email xlink:type="simple">glyva_kostya@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>Никонов</surname><given-names>С. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikonov</surname><given-names>S. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Каширское ш. 31, Москва, 115409</p></bio><bio xml:lang="en"><p>Kashirskoe sh. 31, Moscow, 115409</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Песня</surname><given-names>Ю. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Pesnya</surname><given-names>Y. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>пл. Академика Курчатова 1, Москва, 123182</p></bio><bio xml:lang="en"><p>pl. Akademika Kurchatova 1, Moscow, 123182</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Трофимчук</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Trofimchuk</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>пл. Академика Курчатова 1, Москва, 123182</p></bio><bio xml:lang="en"><p>pl. Akademika Kurchatova 1, Moscow, 123182</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский ядерный университет “МИФИ”; НИЦ “Курчатовский институт”</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Nuclear University MEPhI (Moscow Engineering Physics Institute); National Research Center “Kurchatov Institute”</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Национальный исследовательский ядерный университет “МИФИ”</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>НИЦ “Курчатовский институт”</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Center “Kurchatov Institute”</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>21</day><month>04</month><year>2024</year></pub-date><volume>11</volume><issue>6</issue><fpage>322</fpage><lpage>329</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Глыва К.И., Никонов С.П., Песня Ю.Е., Трофимчук В.В., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Глыва К.И., Никонов С.П., Песня Ю.Е., Трофимчук В.В.</copyright-holder><copyright-holder xml:lang="en">Glyva K.I., Nikonov S.P., Pesnya Y.E., Trofimchuk V.V.</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://npe.elpub.ru/jour/article/view/198">https://npe.elpub.ru/jour/article/view/198</self-uri><abstract><p>В работе приведeн анализ результатов моделирования одной из типов ТВС, используемых в исследовательском реакторе ИР-8. Статья является продолжением работ, в рамках которых был проведен анализ гидравлических испытаний восьми- и шеститрубной ТВС ИРТ-3М и выявлен характер изменения поля скоростей теплоносителя в поперечном сечении штатной шеститрубной ТВС, без учета энерговыделения в твэлах. Расчеты проводились с помощью программы для теплогидравлического расчета ATHLET. В данной работе приводятся результаты связного теплогидравлического и нейтронно-физического расчета ТВС ИРТ-3М. Для нейтронно-физического расчета использовалась программа MCU-PTR. Мультифизичный подход позволяет учитывать влияние на результаты расчетов изменения физических свойств материалов активной зоны. Представлены результаты математического моделирования стационарной работы штатной ТВС ИРТ-3М мощностью 600 кВт. Отлажена совместная работа нейтронно-физического и теплогидравлического расчетных кодов. Получены основные теплофизические параметры ТВС: температуры теплоносителя, оболочек и топлива, определен запас до поверхностного кипения. Используя мультифизичный подход данные теплогидравлические параметры были уточнены. Полученные данные могут быть полезными для дальнейших расчетов подобных ТВС с использованием центрального канала ТВС для установки экспериментальных облучательных устройств. Кроме того, указанные распределения температур могут служить граничными условиями для расчетных моделей облучательных устройств, используемых в 3-х мерных CFD кодах. Результаты этой работы могут быть использованы при определении допустимой мощности исследовательских реакторов типа ИРТ: ИР-8 в НИЦ КИ (Москва), ИРТ-МИФИ в НИЯУ МИФИ (Москва), ИРТ-Т в ТПУ (Томск) и WWR-SM в ИЯФ (Ташкент).</p></abstract><trans-abstract xml:lang="en"><p>The paper analyzes the results of modeling one of the types of fuel assemblies used in the IR-8 research reactor. The article is a continuation of the work in which the analysis of hydraulic tests of the eight- and six-tube fuel assemblies IRT-3M was carried out and the nature of the change in the velocity field of the coolant in the cross-section of a standard six-tube fuel assembly, without taking into account the energy release in the fuel elements, was revealed. The calculation was carried out using the program for thermohydraulic calculation ATHLET. This paper presents the results of a connected thermohydraulic and neutron-physical calculation of IRT-3M fuel assemblies. For neutron-physical calculations, the MCU-PTR program was used. The multiphysics approach makes it possible to take into account the effect on the calculation results of changes in the physical properties of the core materials. The paper presents the results of mathematical modeling of stationary operation of a standard IRT-3M fuel assembly with power rate of 600 kW. The coupled work of the neutron-physical and thermal-hydraulic calculation codes has been debugged. The main thermophysical parameters of fuel assemblies are obtained: temperatures of the coolant, cladding, and fuel, and the margin to surface boiling are determined. Using a multiphysics approach, these thermohydraulic parameters were refined. The data obtained can be useful for further calculations of such fuel assemblies using the central channel of the fuel assembly for installing experimental irradiation devices. In addition, the indicated temperature distributions can serve as boundary conditions for design models of irradiation devices used in 3-D CFD codes. The results of this work can be used to determine the permissible power of research reactors of the IRT type: IR-8 at NRC KI (Moscow), IRT-MEPhI at NRNU MEPhI (Moscow), IRT-T at TPU (Tomsk) and WWRSM at INP (Tashkent).</p></trans-abstract><kwd-group xml:lang="ru"><kwd>мультифизичный подход</kwd><kwd>нейтронно-физический расчет</kwd><kwd>теплогидравлический расчет</kwd><kwd>исследовательский реактор</kwd><kwd>ИР-8</kwd><kwd>ТВС ИРТ-3М</kwd><kwd>ATHLET</kwd><kwd>MCU-PTR</kwd></kwd-group><kwd-group xml:lang="en"><kwd>multiphysics approach</kwd><kwd>neutron-physical calculation</kwd><kwd>thermohydraulic calculation</kwd><kwd>research reactor</kwd><kwd>IR-8</kwd><kwd>IRT-3M fuel assemblies</kwd><kwd>ATHLET</kwd><kwd>MCU-PTR</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">Generation IV International Forum Annual Report. OECD Nuclear Energy Agency. 2015. 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