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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">10.52676/1729-7885-2023-3-174-181</article-id><article-id custom-type="elpub" pub-id-type="custom">nuc-564</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>РЕЗУЛЬТАТЫ РАСЧЕТА ПОЛЯ ЭФФЕКТИВНОЙ ДОЗЫ ИОНИЗИРУЮЩЕГО ИЗЛУЧЕНИЯ В ЦЕНТРАЛЬНОМ ЗАЛЕ РЕАКТОРА ИГР</article-title><trans-title-group xml:lang="en"><trans-title>RESULTS OF CALCULATION OF THE EFFECTIVE DOSE FIELD OF IONIZING RADIATION IN THE CENTRAL ROOM OF THE IGR REACTOR</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>Мухамедиев</surname><given-names>А. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Mukhamediyev</surname><given-names>A. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Асхат Кспекович Мухамедиев</p><p>Курчатов</p></bio><bio xml:lang="en"><p>Kurchatov</p></bio><email xlink:type="simple">mukhamediev@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>Вурим</surname><given-names>А. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Vurim</surname><given-names>A. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Давидович Вурим</p><p>Курчатов</p></bio><bio xml:lang="en"><p>Kurchatov</p></bio><email xlink:type="simple">vurim@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>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>Ирина Валентиновна Прозорова</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>Прозоров</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Prozorov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Андрей Александрович Прозоров</p><p>Курчатов</p></bio><bio xml:lang="en"><p>Kurchatov</p></bio><email xlink:type="simple">paa@nnc.kz</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Филиал «Институт атомной энергии» РГП НЯЦ РК</institution><country>Казахстан</country></aff><aff xml:lang="en"><institution>Branch “Institute of Atomic Energy” RSE NNC RK</institution><country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>30</day><month>09</month><year>2023</year></pub-date><volume>0</volume><issue>3</issue><fpage>174</fpage><lpage>181</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мухамедиев А.К., Вурим А.Д., Прозорова И.В., Прозоров А.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Мухамедиев А.К., Вурим А.Д., Прозорова И.В., Прозоров А.А.</copyright-holder><copyright-holder xml:lang="en">Mukhamediyev A.K., Vurim A.D., Prozorova I.V., Prozorov A.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/564">https://journals.nnc.kz/jour/article/view/564</self-uri><abstract><p>Оценены характеристики поля эффективной дозы и мощности дозы ионизирующего излучения, формирующейся в зале реактора ИГР при его работе на постоянной мощности 100 МВт в течение 40 секунд.</p><p>Определена величина эффективной дозы и ее мощности в экспериментальном устройстве с целью оценки уровня потенциальной радиационной нагрузки на малогабаритные нейтронные детекторы (камеры деления), которые предполагается использовать для измерения локальных значений плотности потока быстрых нейтронов при облучении устройства в реакторе ИГР.</p><p>Для проведения расчетов разработаны модели реактора ИГР с верхним перекрытием, бетонной биологической защитой и двумя вариантами загрузки центрального экспериментального канала реактора. Моделирование переноса фотонов выполнено с использованием кода MCNP5 и библиотеками констант ENDF/B-5,6, при этом характеристики продуктов деления, процессы распада 235U и процессы формирования полей γ-квантов описывались с использованием библиотек ядерных данных МАГАТЭ и JAEA.</p><p>Валидации предложенного метода расчета эффективной дозы выполнена по результатам прямых измерений эффективной дозы в зале реактора. Результаты валидации подтверждают корректность предложенных расчетных моделей и методик, и, соответственно, допустимость их применения для оценки радиационной обстановки в зале реактора ИГР.</p><p>Полученные результаты будут использоваться при выборе мест размещения вторичной аппаратуры системы измерения параметров экспериментальных устройств.</p></abstract><trans-abstract xml:lang="en"><p>The characteristics of the effective dose field and the dose rate of the ionizing radiation formed in the room of the IGR reactor during its operation at a constant power of 100 MW for 40 seconds have been estimated.</p><p>The value of the effective dose and its power in the experimental device has been determined in order to assess the level of the potential radiation load on the small-sized neutron detectors (fission chambers), which are supposed to be used to measure the local values of the fast neutron flux density during the irradiation of the device in the IGR reactor.</p><p>To carry out the calculations, the models of the IGR reactor with an upper ceiling, concrete biological protection and two options for loading the central experimental channel of the reactor have been developed. Photon transfer modeling has been performed using the MCNP5 code and the libraries of ENDF/B-5,6 constants, while the characteristics of fission products, 235U decay processes and the processes of formation of gamma-quantum fields were described using the IAEA and JAEA nuclear data libraries.</p><p>The validation of the proposed method for calculating the effective dose has been performed based on the results of the direct measurements of the effective dose in the reactor room. The validation results confirm the correctness of the proposed calculation models and techniques, and, accordingly, the admissibility of their application for assessing the radiation situation in the IGR reactor room.</p><p>The obtained results will be used in the selection of the locations of secondary equipment for measuring the parameters of the experimental devices.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>реактор ИГР</kwd><kwd>γ-излучение</kwd><kwd>γ-активность</kwd><kwd>мощность эффективной дозы</kwd><kwd>MCNP</kwd><kwd>SAIGA</kwd></kwd-group><kwd-group xml:lang="en"><kwd>IGR reactor</kwd><kwd>γ-radiation</kwd><kwd>γ-activity</kwd><kwd>effective dose rate</kwd><kwd>MCNP</kwd><kwd>SAIGA</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Данные исследования финансировались Министерством энергетики Республики Казахстан в рамках научно-технической программы «Развитие атомной энергетики в Республике Казахстан» (ИРН – BR09158470)</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">Цхе В.К., Котляр А.Н., Миллер А.А., Гайдайчук В.А., Кажитаев С.М., Вурим А.Д., Гныря В.С., Прозорова И.В., Мухамедиев А.К. 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