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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">npe</journal-id><journal-title-group><journal-title xml:lang="ru">Ядерная физика и инжиниринг</journal-title><trans-title-group xml:lang="en"><trans-title>Nuclear Physics and Engineering</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2079-5629</issn><issn pub-type="epub">2079-5637</issn><publisher><publisher-name>МИФИ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.56304/S2079562925060168</article-id><article-id custom-type="edn" pub-id-type="custom">VLNCMD</article-id><article-id custom-type="elpub" pub-id-type="custom">npe-578</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>Инженерное проектирование ядерно-физической аппаратуры</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Engineering Design of Nuclear Physical Equipment</subject></subj-group></article-categories><title-group><article-title>РАСЧЕТНАЯ МОДЕЛЬ КОНДЕНСАЦИИ СВЕРХТЕКУЧЕГО ГЕЛИЯ В КАМЕРЕ ИСТОЧНИКА УЛЬТРАХОЛОДНЫХ НЕЙТРОНОВ ДЛЯ РЕАКТОРА ПИК</article-title><trans-title-group xml:lang="en"><trans-title>CALCULATION METHOD OF SUPERFLUID HELIUM CONDENSATION IN THE ULTRACOLD NEUTRON SOURCE VESSEL FOR THE PIС 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>Лямкин</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Lyamkin</surname><given-names>V. A.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Серебров</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Serebrov</surname><given-names>A. P.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коптюхов</surname><given-names>А. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Koptyukhov</surname><given-names>A. O.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сиротин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sirotin</surname><given-names>A. V.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бородинов</surname><given-names>Г. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Borodinov</surname><given-names>G. O.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Недоляк</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Nedolyak</surname><given-names>A. A.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Прудников</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Prudnikov</surname><given-names>D. V.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хазов</surname><given-names>П. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Hazov</surname><given-names>P. A.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Петербургский институт ядерной физики им. Б.П. Константинова Национального исследовательского центра “Курчатовский институт”</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Centre “Kurchatov Institute” (NRC “Kurchatov Institute” – PNPI)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>31</day><month>12</month><year>2025</year></pub-date><volume>16</volume><issue>6</issue><fpage>866</fpage><lpage>872</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Лямкин В.А., Серебров А.П., Коптюхов А.О., Сиротин А.В., Бородинов Г.О., Недоляк А.А., Прудников Д.В., Хазов П.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Лямкин В.А., Серебров А.П., Коптюхов А.О., Сиротин А.В., Бородинов Г.О., Недоляк А.А., Прудников Д.В., Хазов П.А.</copyright-holder><copyright-holder xml:lang="en">Lyamkin V.A., Serebrov A.P., Koptyukhov A.O., Sirotin A.V., Borodinov G.O., Nedolyak A.A., Prudnikov D.V., Hazov P.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://npe.elpub.ru/jour/article/view/578">https://npe.elpub.ru/jour/article/view/578</self-uri><abstract><p>Представлена расчетная методика скорости конденсации сверхтекучего гелия в камере источника ультрахолодных нейтронов для реактора ПИК. Получена теоретическая скорость конденсации гелия равная 5.36 л/ч. Для апробации результатов расчета проведен натурный эксперимент по конденсации гелия в замкнутой емкости. Для эксперимента использовался гелиевый криостат КГ60/300-1, подключенный к технологическому комплексу получения сверхтекучего гелия для источника УХН. Температура в криостате поддерживалась вакуумной откачкой. Скорость ожижения в ходе эксперимента составила 1.64 л/ч, что с хорошей точностью подтверждает предложенную теоретическую расчетную модель, которая предсказывала скорость ожижения равной 1.72 л/ч. Рассчитано время выхода источника УХН на рабочий температурный режим – 6.5 ч при суммарном расходе жидкого гелия 64 л. Эта оценка будет учитываться при планировании штатной работы источника УХН для реактора ПИК.</p></abstract><trans-abstract xml:lang="en"><p>A calculation methodology of the condensation rate of superfluid helium in the ultracold neutron source vessel for the PIC reactor is presented. The theoretical helium condensation rate of 5.36 L/h is obtained. To approve the calculation results, a full-scale experiment on helium condensation in a closed vessel was carried out. For the experiment the helium cryostat KG60/300-1 connected to the technological complex of superfluid helium production for the ultracold neutron source was used. The temperature in the cryostat was maintained by helium vapour pumping. The liquefaction rate during the experiment was 1.64 L/h, which confirms with good accuracy the proposed theoretical calculation model, which predicted the liquefaction rate to be 1.72 L/h. The time for the ultracold neutron source to reach the operating temperature regime was calculated to be 6.5 h at a total liquid helium consumption of 64 L. This estimation will be taken into account when planning the regular operation of the ultracold neutron source for the PIK reactor.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ультрахолодные нейтроны</kwd><kwd>сверхтекучий гелий</kwd><kwd>криостатирование</kwd><kwd>ожижение гелия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ultracold neutrons</kwd><kwd>superfluid helium</kwd><kwd>cryostatting</kwd><kwd>vacuum cooling</kwd><kwd>liquefaction of helium-4</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при поддержке Российского научного фонда, грант № 23-72-10007</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">Serebrov A.P. et al. // Tech. Phys. 2022. V. 67 (6). P. 763–769.</mixed-citation><mixed-citation xml:lang="en">Serebrov A.P. et al. // Tech. Phys. 2022. V. 67 (6). 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