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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">nuc</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник НЯЦ РК</journal-title><trans-title-group xml:lang="en"><trans-title>NNC RK Bulletin</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1729-7516</issn><issn pub-type="epub">1729-7885</issn><publisher><publisher-name>Национальный ядерный центр Республики Казахстан</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.52676/1729-7885-2024-2-27-33</article-id><article-id custom-type="elpub" pub-id-type="custom">nuc-629</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>Статьи</subject></subj-group></article-categories><title-group><article-title>ЭКСПЕРИМЕНТАЛЬНОЕ ОПРЕДЕЛЕНИЕ ТЕМПЕРАТУРНОГО КОЭФФИЦИЕНТА РЕАКТИВНОСТИ РЕАКТОРА ИВГ.1М</article-title><trans-title-group xml:lang="en"><trans-title>EXPERIMENTAL DETERMINATION OF THE TEMPERATURE COEFFICIENT OF THE IVG.1M REACTOR REACTIVITY</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-0801-3535</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Нуржанов</surname><given-names>Е. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Nurzhanov</surname><given-names>Ye. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>начальник смены службы подготовки и проведения экспериментов на КИР "Байкал-1",</p><p>Курчатов</p></bio><bio xml:lang="en"><p>Kurchatov</p></bio><email xlink:type="simple">nurerlan@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>Гныря</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Gnyrya</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>зам. директора по испытаниям,</p><p>Курчатов</p></bio><bio xml:lang="en"><p>Kurchatov</p></bio><email xlink:type="simple">slava@nnc.kz</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>Азимханов</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Azimkhanov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>начальник КИР 'Байкал-1' (300) - главный инженер КИР,</p><p>Курчатов</p></bio><bio xml:lang="en"><p>Kurchatov</p></bio><email xlink:type="simple">azimhanov@nnc.kz</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>Дербышев</surname><given-names>И. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Derbyshev</surname><given-names>I. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Курчатов</p></bio><bio xml:lang="en"><p>Kurchatov</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>Прозорова</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Prozorova</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>начальник лаборатории нейтронной физики (241),</p><p>Курчатов</p></bio><bio xml:lang="en"><p>Kurchatov</p></bio><email xlink:type="simple">prozorova@nnc.kz</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>Иркимбеков</surname><given-names>Р. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Irkimbekov</surname><given-names>R. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>начальник лаборатории  исследований теплофизических и нейтронно-физических характеристик облучательных установок (222),</p><p>Курчатов</p></bio><bio xml:lang="en"><p>Kurchatov</p></bio><email xlink:type="simple">Irkimbekov@nnc.kz</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>Попов</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Popov</surname><given-names>Yu. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>заместитель начальника лаборатории нейтронной физики (241),</p><p>Курчатов</p></bio><bio xml:lang="en"><p>Kurchatov</p></bio><email xlink:type="simple">Popov@nnc.kz</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>Витюк</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Vityuk</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>заместитель генерального директора по науке,</p><p>Курчатов</p></bio><bio xml:lang="en"><p>Kurchatov</p></bio><email xlink:type="simple">vityuk@nnc.kz</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Филиал «Институт атомной энергии» РГП НЯЦ РК<country>Казахстан</country></aff><aff xml:lang="en">Branch “Institute of Atomic Energy” RSE NNC RK<country>Kazakhstan</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">РГП «Национальный ядерный центр Республики Казахстан»<country>Казахстан</country></aff><aff xml:lang="en">RSE “National Nuclear Center of the Republic of Kazakhstan”<country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>30</day><month>06</month><year>2024</year></pub-date><volume>0</volume><issue>2</issue><fpage>27</fpage><lpage>33</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Нуржанов Е.Б., Гныря В.С., Азимханов А.С., Дербышев И.К., Прозорова И.В., Иркимбеков Р.А., Попов Ю.А., Витюк В.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Нуржанов Е.Б., Гныря В.С., Азимханов А.С., Дербышев И.К., Прозорова И.В., Иркимбеков Р.А., Попов Ю.А., Витюк В.А.</copyright-holder><copyright-holder xml:lang="en">Nurzhanov Y.B., Gnyrya V.S., Azimkhanov A.S., Derbyshev I.K., Prozorova I.V., Irkimbekov R.A., Popov Y.A., Vityuk V.A.</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://journals.nnc.kz/jour/article/view/629">https://journals.nnc.kz/jour/article/view/629</self-uri><abstract><p>Актуальность исследования связана с безопасностью управления ядерной установкой. Определение температурного коэффициента реактивности (ТКР) экспериментальным путем представляет собой довольно сложную задачу. Одна из основных трудностей заключается в разогреве реактора от двух (или более) источников тепла с различной температурой в течение продолжительного времени, достаточного для изотермического разогрева всех частей реактора. Доказательством изотермического разогрева реактора может быть выравнивание температуры теплоносителя в раздаточном коллекторе (на входе в реактор) и в сливном коллекторе (на выходе из реактора) в течение времени, достаточного для стабилизации критического состояния реактора и соответственно положения регулирующих органов.</p><p>Суть метода исследования связана с тем, что при проведении эксперимента по определению ТКР были созданы условия, при которых исключались барометрический (гидродинамический) и мощностной эффекты, влияющие на реактивность исследовательского реактора.</p><p>Значимость результатов заключается в том, что для реактора ИВГ.1М ТКР, один из важных параметров оценки безопасности, был определен экспериментальным путем после конверсии реактора с высокообогащенного (ВОУ) на низкообогащенный уран (НОУ) топливо.</p></abstract><trans-abstract xml:lang="en"><p>The relevance of the study is related to the of nuclear control safety. Determining the temperature coefficient of reactivity (TCR) experimentally is a rather difficult problem. One of the main difficulties is to heat up the reactor from two (or more) heat sources with different temperatures for a long time, sufficient for the isothermal heating of all reactor parts. The proof of the reactor isothermal heating may be the equalization of the coolant temperature in the distribution header (at the reactor inlet) and in the drain header (at the reactor outlet) for a time sufficient to stabilize the reactor critical state and the position of the regulatory authorities accordingly.</p><p>The essence of the study method is related to the fact that during the experiment to determine the TCR, the conditions were created under which barometric (hydrodynamic) and power effects affecting the research reactor reactivity were excluded.</p><p>The significance of the results is the fact that the TCR, one of the important safety assessment parameters for the IVG.1M reactor, was determined experimentally after the reactor was converted from highly enriched (HEU) to low enriched uranium (LEU) fuel.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>реактор ИВГ.1М</kwd><kwd>реактивность</kwd><kwd>температурный коэффициент реактивности</kwd></kwd-group><kwd-group xml:lang="en"><kwd>IVG.1M reactor</kwd><kwd>reactivity</kwd><kwd>temperature coefficient of reactivity</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Работа выполнена при финансовой поддержке Комитета науки Министерства науки и высшего образования Республики Казахстан (Проект программно-целевого финансирования BR21882185 «Исследования в поддержку создания и безопасного функционирования атомной электростанции в Республике Казахстан»)</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">da Silva, R. 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