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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">sat</journal-id><journal-title-group><journal-title xml:lang="ru">НАУКА и ТЕХНИКА</journal-title><trans-title-group xml:lang="en"><trans-title>Science &amp; Technique</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2227-1031</issn><issn pub-type="epub">2414-0392</issn><publisher><publisher-name>Belarusian National Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21122/2227-1031-2023-22-4-326-332</article-id><article-id custom-type="elpub" pub-id-type="custom">sat-2696</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</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>POWER ENGINEERING</subject></subj-group></article-categories><title-group><article-title>Гидродинамика теплоносителя в активной зоне реактора PWR  с ТВС-Квадрат разных конструкций</article-title><trans-title-group xml:lang="en"><trans-title>Coolant Hydrodynamics in the PWR Reactor Core with TVS-Kvadrat of  Various Designs</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>Дмитриев</surname><given-names>С. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Dmitriev</surname><given-names>S. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Доктор технических наук, профессор</p><p>Адрес для переписки:Дмитриев Сергей Михайлович – Нижегородский государственный технический университет имени Р. Е. Алексеева,ул. Минина, 24,603950, г. Нижний Новгород, Российская Федерация.Тел.: +7 831 436-23-25 dmitriev@nntu.ru</p><p> </p></bio><bio xml:lang="en"><p>Address for correspondence:Dmitriev Sergei M. – Nizhny Novgorod State Technical University named after R. E. Alekseev,24, Minina str.,603950, Nizhny Novgorod, Russian Federation.Tel.: +7 831 436-23-25dmitriev@nntu.ru</p></bio><email xlink:type="simple">dmitriev@nntu.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>Буров</surname><given-names>А. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Burov</surname><given-names>A. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Инженер</p><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</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>Демкина</surname><given-names>Т. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Demkina</surname><given-names>T. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аспирант</p><p>г. Нижний Новгород</p></bio><bio xml:lang="en"><p>Nizhny Novgorod</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>Добров</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Dobrov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Инженер</p><p>г. Нижний Новгород</p></bio><bio xml:lang="en"><p>Nizhny Novgorod</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>Доронков</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Doronkov</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук</p><p>г. Нижний Новгород</p></bio><bio xml:lang="en"><p>Nizhny Novgorod</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>Доронкова</surname><given-names>Д. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Doronkova</surname><given-names>D. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аспирант</p><p>г. Нижний Новгород</p></bio><bio xml:lang="en"><p>Nizhny Novgorod</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>Курицин</surname><given-names>Д. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuritsin</surname><given-names>D. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Магистр</p><p>г. Нижний Новгород</p></bio><bio xml:lang="en"><p>Nizhny Novgorod</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>Пронин</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Pronin</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Инженер</p><p>г. Нижний Новгород</p></bio><bio xml:lang="en"><p>Nizhny Novgorod</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>Рязанов</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ryazanov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аспирант</p><p>г. Нижний Новгород</p></bio><bio xml:lang="en"><p>Nizhny Novgorod</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>Солнцев</surname><given-names>Д. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Solntsev</surname><given-names>D. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук</p><p>г. Нижний Новгород</p></bio><bio xml:lang="en"><p>Nizhny Novgorod</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Нижегородский государственный технический университет имени Р. Е. Алексеева</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Nizhniy Novgorod State Technical University named after R. E. Alekseev</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Белорусский национальный технический университет</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Belarusian National Technical University</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>07</day><month>08</month><year>2023</year></pub-date><volume>22</volume><issue>4</issue><fpage>326</fpage><lpage>332</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Дмитриев С.М., Буров А.Л., Демкина Т.Д., Добров А.А., Доронков Д.В., Доронкова Д.С., Курицин Д.Д., Пронин А.Н., Рязанов А.В., Солнцев Д.Н., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Дмитриев С.М., Буров А.Л., Демкина Т.Д., Добров А.А., Доронков Д.В., Доронкова Д.С., Курицин Д.Д., Пронин А.Н., Рязанов А.В., Солнцев Д.Н.</copyright-holder><copyright-holder xml:lang="en">Dmitriev S.M., Burov A.L., Demkina T.D., Dobrov A.A., Doronkov D.V., Doronkova D.S., Kuritsin D.D., Pronin A.N., Ryazanov A.V., Solntsev D.N.</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://sat.bntu.by/jour/article/view/2696">https://sat.bntu.by/jour/article/view/2696</self-uri><abstract><p> В статье приведены результаты экспериментальных исследований гидродинамики теплоносителя в активной зоне реактора PWR c ТВС-Квадрат разных конструкций. Экспериментальные исследования гидродинамики заключались в изучении полей скоростей и процесса поперечного перетекания теплоносителя между соседними ТВС-Квадрат разных конструкций в однородной и смешанной активных зонах на масштабных экспериментальных моделях, включающих в себя фрагменты двух соседних ТВС-Квадрат и зазор между ними. Экспериментальные модели отличаются количеством установленных решеток. Это обусловлено тем, что в однородной активной зоне гидравлическая нагрузка по высоте ТВС идентична, а в смешанной – неравномерна из-за разного количества установленных решеток. Гидродинамика теплоносителя изучалась на аэродинамическом исследовательском стенде с учетом теории гидродинамического подобия с использованием пневмометрических датчиков с индивидуальной тарировкой. На основании полученных данных построены поля локальных осевых и поперечных скоростей в различных сечениях по длине исследуемого участка экспериментальных моделей. Изучены поля локальных безразмерных поперечных и аксиальных скоростей потока в твэльных пучках и зазоре между ТВС-Квадрат активной зоны реактора PWR. Выявлены особенности процесса поперечного перетекания потока между соседними ТВС-Квадрат однородной и смешанной активной зон реактора PWR. Результаты экспериментальных исследований переданы разработчику ТВС-Квадрат АО «ОКБМ Африкантов» для дальнейшего использования при обосновании конструкции и режимов работы ядерной энергетической установки.</p></abstract><trans-abstract xml:lang="en"><sec><title></title><p>. The paper presents the results of experimental studies of the hydrodynamics of the coolant in the core of the PWR reactor with fuel assemblies “TVS-Kvadrat” of various designs. Experimental studies of hydrodynamics consisted in studying the velocity fields and the process of cross-flow of coolant between adjacent fuel assemblies “TVS-Kvadrat” of various designs in homogeneous and mixed cores on large-scale experimental models, including fragments of two adjacent fuel assemblies “TVS-Kvadrat” and a gap between them. The test models differ in the number of installed grids, this is due to the fact that in a homogeneous core the hydraulic load along the height of the fuel assemblies is identical, and in a mixed core the hydraulic load is uneven due to the different number of installed grids. The hydrodynamics of the coolant has been studied on an aerodynamic open-loop based on the theory of hydrodynamic similarity, using individually calibrated pneumometric sensors. Based on the data obtained, the fields of local axial and transverse velocities in various sections along the length of the studied section of the test models have been constructed. The fields of local dimensionless transverse and axial flow velocities in the fuel bundles and the gap between the fuel assemblies “TVS-Kvadrat” of the PWR reactor core have been studied. Peculiarities of the process of transverse flow between adjacent “TVS-Kvadrat” of a homogeneous and the mixed core of the PWR reactor have been revealed. The results of experimental studies have been transferred to the developer of “TVS-Kvadrat”, that is  JSC “Experimental Design Bureau of Mechanical Engineering named after I. I. Afrikantov”,  for further use in justifying the design and operating modes of a nuclear power plant.</p></sec><sec><title> </title><p> </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>ядерный реактор</kwd><kwd>активная зона</kwd><kwd>ТВС-Квадрат</kwd><kwd>перемешивающая и дистанционирующая решетка</kwd><kwd>стабилизирующая решетка</kwd><kwd>гидродинамика теплоносителя</kwd><kwd>поперечное перетекание потока</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nuclear reactor</kwd><kwd>core</kwd><kwd>TVS-Kvadrat</kwd><kwd>mixing and spacer grid</kwd><kwd>stabilizing spacer grid</kwd><kwd>coolant hydrodynamics</kwd><kwd>coolant cross flow</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания в сфере научной деятельности (тема № FSWE–2021–0008</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Топливо для ВВЭР и PWR. 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