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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">glonucsec</journal-id><journal-title-group><journal-title xml:lang="ru">Глобальная ядерная безопасность</journal-title><trans-title-group xml:lang="en"><trans-title>Global Nuclear Safety</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2305-414X</issn><issn pub-type="epub">2499-9733</issn><publisher><publisher-name>National Research Nuclear University "MEPhI"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26583/gns-2023-03-08</article-id><article-id custom-type="edn" pub-id-type="custom">YBZMTK</article-id><article-id custom-type="elpub" pub-id-type="custom">glonucsec-208</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>ЭКСПЛУАТАЦИЯ ОБЪЕКТОВ АТОМНОЙ ОТРАСЛИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>OPERATION OF FACILITIES NUCLEAR INDUSTRY</subject></subj-group></article-categories><title-group><article-title>Верификация модели динамики ядерного реактора ВВЭР-1200, состоящей из одного топливного узла, примыкающего к двум узлам теплоносителя</article-title><trans-title-group xml:lang="en"><trans-title>Verification of the WWER-1200 reactor dynamic model consisting of one-fuel unit adjacent to two coolant units</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3225-4748</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Правосуд</surname><given-names>С. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Pravosud</surname><given-names>S. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Инженер по подготовке персонала 1 категории кафедры "Измерительные системы и метрология"Преподаватель кафедры "Электроника и автоматика физических установок"</p></bio><bio xml:lang="en"><p>First category engineer for personnel training of the Department of Measuring Systems and Metrology</p><p>Instructor of the Department of Electronics and Automatics of Physical Facilities</p></bio><email xlink:type="simple">sspravosud@mephi.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/0009-0001-9810-1066</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Маслаков</surname><given-names>Д. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Maslakov</surname><given-names>D. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Студент 6-го курса кафедры «Электроника и автоматика физических установок»</p></bio><bio xml:lang="en"><p>, 6th year student of the Department of Electronics and Automatics of Physical Facilities</p></bio><email xlink:type="simple">danmaslakov@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-3461-0476</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Якубов</surname><given-names>Я. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Yakubov</surname><given-names>Ya. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Студент 5-го курса кафедры «Электроника и автоматика физических установок»</p></bio><bio xml:lang="en"><p>5th year student of the Department of Electronics and Automatics of Physical Facilities </p></bio><email xlink:type="simple">yarik.tomsk@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-4004-2275</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Овчеренко</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Ovcherenko</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Помощник руководителя</p></bio><bio xml:lang="en"><p>Executive assistant </p></bio><email xlink:type="simple">AAOvcherenko@rosatom.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">АНО ДПО "Техническая академия Росатома&#13;
Северский Технологический Институт - филиал Национального Исследовательского Ядерного Университета МИФИ<country>Россия</country></aff><aff xml:lang="en">Rosatom Technical Academy, &#13;
Seversk Technological Institute the branch of National Research Nuclear University «MEPhI»<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Северский Технологический Институт - филиал Национального Исследовательского Ядерного Университета МИФИ<country>Россия</country></aff><aff xml:lang="en">Seversk Technological Institute the branch of National Research Nuclear University «MEPhI»<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru">АНО ДПО Техническая академия Росатома<country>Россия</country></aff><aff xml:lang="en">Rosatom Technical Academy<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>21</day><month>09</month><year>2023</year></pub-date><volume>48</volume><issue>3</issue><fpage>82</fpage><lpage>95</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Правосуд С.С., Маслаков Д.С., Якубов Я.О., Овчеренко А.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Правосуд С.С., Маслаков Д.С., Якубов Я.О., Овчеренко А.А.</copyright-holder><copyright-holder xml:lang="en">Pravosud S.S., Maslakov D.S., Yakubov Y.O., Ovcherenko A.A.</copyright-holder><license 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://glonucsec.elpub.ru/jour/article/view/208">https://glonucsec.elpub.ru/jour/article/view/208</self-uri><abstract><p>В силу того, что современная теория автоматического управления накладывает ограничения на математические модели объекта управления, дальнейшее развитие и верификация математических моделей ядерных энергетических установок, пригодных для синтеза системы автоматического регулирования мощности, является актуальной задачей. В статье рассматривается модель динамики низкого порядка со сосредоточенными параметрами водо-водяного энергетического реактора российского дизайна, а также проводится ее верификация с экспериментальными данными полноразмерного тренажера реактора ВВЭР-1200 в двух тестах, связанных с изменением положения 12 группы ОР СУЗ и изменением входной температуры теплоносителя. Для этого полученная модель была создана в программном пакете MATLAB в качестве S-function lv.2 для возможности обработки любых входных сигналов. В рамках предложенного подхода уравнение для описания процесса нагрева теплоносителя представлено в виде модели двух последовательно соединенных узлов. В представленной работе показано преимущество данного подхода по сравнению с традиционным, где среднее значение температуры теплоносителя определено как полусумма входной и выходной температур на примере теста с резким изменением входной температуры теплоносителя в активную зону. В частотной области авторы приводят анализ устойчивости модели в форме пространства состояний по отношению к различным внешним возмущениям. Сделаны выводы о возможность использования предложенной модели как объекта управления пятого порядка для параметрического синтеза регулятора системы автоматического регулирования мощности ядерной энергетической установки.</p></abstract><trans-abstract xml:lang="en"><p>As modern control systems engineering imposes limits on mathematical models of control objects, further development, and verification of the mathematical models suitable for power control system synthesis of nuclear power facilities is an ongoing problem. This article deals with the low-order dynamics model with lumped parameters of the Russian-designed pressurized water reactor, as well as its verification with experimental data from the full-size simulator of the WWER – 1200 nuclear reactor within two tests related to changing the position of Group 12 of CPS CR and changing the inlet coolant temperature. This model was created as a MATLAB S-function lv.2 model because of its capability to handle any type of signal.  Within this approach, the equation describing the coolant heating process is represented as a «two well-stirred tanks in series» model. The article demonstrates the upside of the given approach in comparison with the conventional approach, where the average temperature of the coolant is determined as an arithmetic mean of inlet and outlet coolant temperatures, respectively, on the basis of the test with a sudden change of the reactor inlet coolant temperature. In the frequency domain, the authors carry out stability analyses of the given model in a state-space form in relation to different external disturbances. Conclusions about the suitability of the given model as a fifth-order control object for parametric synthesis of a controller for the power control system of a nuclear power facility are drawn.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Динамика реакторов</kwd><kwd>ВВЭР-1200</kwd><kwd>верификация</kwd><kwd>передаточная функция</kwd><kwd>пространство состояний</kwd><kwd>регулятор мощности</kwd><kwd>теплогидравлика</kwd><kwd>модель Манна</kwd><kwd>ОР СУЗ</kwd><kwd>MATLAB S-Function lv.2</kwd><kwd>Simulink</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Reactor dynamics</kwd><kwd>WWER-1200</kwd><kwd>verification</kwd><kwd>transfer function</kwd><kwd>state space representation</kwd><kwd>power controller</kwd><kwd>thermal hydraulics</kwd><kwd>Mann’s model</kwd><kwd>CPS CR</kwd><kwd>MATLAB S-Function lv.2</kwd><kwd>Simulink</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">Pikina G.A., Dinh L.V., Pashchenko A.F., Pashchenko F.F. 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