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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-2024-04-01-10</article-id><article-id custom-type="edn" pub-id-type="custom">RRNJCF</article-id><article-id custom-type="elpub" pub-id-type="custom">glonucsec-247</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>Исследование комбинированных вариантов размещения выгорающих  поглотителей Er и Gd в тепловыделяющих сборках реакторов ВВЭР  для оптимизации процесса выгорания</article-title><trans-title-group xml:lang="en"><trans-title>Burnable absorber element (Gd and Er) use in the WWER-type reactor to increase the refueling time</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7803-8234</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рахман</surname><given-names>А. С.К.</given-names></name><name name-style="western" xml:lang="en"><surname>Rahman</surname><given-names>A. S.K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>старший научный сотрудник</p></bio><bio xml:lang="en"><p>Senior Scientific Officer (SSO) </p></bio><email xlink:type="simple">ranisur01@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4917-1770</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Увакин</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Uvakin</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат физико-математических наук, доцент</p></bio><bio xml:lang="en"><p>Cand. Sci. (Phys. Math.), Associate Professor</p></bio><email xlink:type="simple">uvakin_ma@grpress.podolsk.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/0000-0001-8328-0092</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хоссен</surname><given-names>М. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Hossen</surname><given-names>M. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>главный научный сотрудник</p></bio><bio xml:lang="en"><p>Principal Scientific Officer (PSO)</p></bio><email xlink:type="simple">mufa50du@yahoo.com</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Управление по регулированию атомной энергии Бангладеш (БАЭРА)<country>Россия</country></aff><aff xml:lang="en">Bangladesh Atomic Energy Regulatory Authority (BAERA)<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Национальный исследовательский ядерный университет «МИФИ»<country>Россия</country></aff><aff xml:lang="en">National Research Nuclear University «MEPhI»<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru">Комиссия по атомной энергии Бангладеш (БАЭС)<country>Россия</country></aff><aff xml:lang="en">Bangladesh Atomic Energy Commission<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>27</day><month>03</month><year>2024</year></pub-date><volume>14</volume><issue>1</issue><fpage>76</fpage><lpage>84</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Рахман А.С., Увакин М.А., Хоссен М.М., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Рахман А.С., Увакин М.А., Хоссен М.М.</copyright-holder><copyright-holder xml:lang="en">Rahman A.S., Uvakin M.A., Hossen M.M.</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/247">https://glonucsec.elpub.ru/jour/article/view/247</self-uri><abstract><p>В водо-водяном реакторе типа ВВЭР избыточную реактивность могут компенсировать материалы с высоким поглощением нейтронов. В статье проведен теоретический и расчетный анализ использования выгорающих поглотителей, размещенных в твэле, для снижения запаса реактивности и увеличения времени перегрузки реакторов типа ВВЭР. Для исследования снижения запаса реактивности расчет выгорания топлива проводился без выгорающего поглотителя и с комбинацией различных выгорающих поглотителей, а именно природного гадолиния (Gd) и эрбия (Er), с использованием упрощенной программы GETERA. В результате расчета установлено, что изменение количества выгорающего поглотителя (Gd, Er) внутри ТВС определяет запас реактивности по выгоранию топлива и повышает эффективность уранового топлива (UO2). Совместное использование Gd и Er приводит к более плавному снижению реактивности реактора за счет меньшего сечения поглощения Er, что позволяет снизить общую массу Gd в твэле и уменьшить эффект блокировки. При расчете использовались концентрации Gd в пределах 1,5% и 3%, а концентрации Er использовались в диапазоне 0,1–0,6%.</p></abstract><trans-abstract xml:lang="en"><p>In a WWER-type pressurized water reactor, high-neutron-absorbing materials can compensate for the excess reactivity. Theoretical and computational analyses were conducted in this article to use burnable absorbers placed in a fuel rod to reduce the reactivity margin for extending refueling time for WWER-type reactors. To investigate the reduction of the reactivity margin, the fuel burnup calculation was performed without a burnable absorber and with a combination of a variety of burnable absorbers, namely natural Gadolinium (Gd) and Erbium (Er), applying a simplified GETERA program. The calculation found that the variation of the quantity of the burnable absorber (Gd, Er) inside the fuel assemblies governs the reactivity margin for the fuel burnup and increases the efficiency of Uranium fuel (UO2). The combined use of Gd and Er leads to a smoother decrease in reactor reactivity due to a smaller Er absorption cross section, which makes it possible to reduce the total mass of Gd in the fuel element and reduce the blocking effect. In the calculation, Gd concentrations employed in the computation at 1.5% and 3%, while Er concentrations were used within the range of 0.1%–0.6%. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>ВВЭР</kwd><kwd>выгорающий поглотитель (БА)</kwd><kwd>избыточная реактивность</kwd><kwd>гадолиний</kwd><kwd>эрбий</kwd><kwd>выгорание</kwd><kwd>ТВС</kwd><kwd>запас реактивности.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>WWER</kwd><kwd>burnable absorber (BA)</kwd><kwd>excess reactivity</kwd><kwd>gadolinium</kwd><kwd>erbium</kwd><kwd>burnup</kwd><kwd>fuel assembly</kwd><kwd>reactivity margin</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">Rahman S.K. Anisur, Uvakin M.A. Compare the Result of Uncertainty Analysis in the Physical Calculations of WWER Cells in the Daily Maneuvering Schedule by GETERA and WIMS Programs. Global nuclear safety. 2019;1(30):90–100. 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