Персона: Тихомиров, Георгий Валентинович
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Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
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Руководитель научной группы "Лаборатория виртуальной реальности в области ядерных технологий"
Руководитель научной группы "Лаборатория инженерного компьютерного моделирования"
Руководитель научной группы "Лаборатория инженерного компьютерного моделирования"
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Тихомиров
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Георгий Валентинович
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- ПубликацияОткрытый доступ"ИНТЕРАКТИВНАЯ ЛАБОРАТОРНАЯ РАБОТА В ВИРТУАЛЬНОЙ РЕАЛЬНОСТИ "ПУСК РЕАКТОРА ИРТ МИФИ"(НИЯУ МИФИ, 2023) Пугачев, П. А.; Тихомиров, Г. В.; Кирюхин, П. К.; Григорьев, Е. В.; Щербаков, А. А.; Романенко, В. И.; Хомяков, Д. А.; Минаев, Е. В. ; Чернов, Е. В.; Романенко, Владислав Игоревич; Чернов, Евгений Владимирович; Тихомиров, Георгий Валентинович; Кирюхин, Павел Константинович; Хомяков, Дмитрий Андреевич; Щербаков, Александр Антонович; Пугачев, Павел АлександровичПрограмма предназначена для обучения студентов основам обращения с экспериментальными реакторами на примере операции пуска. Лабораторная работа выполнена в виде интерактивного приложения в виртуальной реальности, воссоздающего опыт работы на установке-прототипе - реакторе ИРТ МИФИ. Лабораторная работа включает окружение ИРТ МИФИ, полностью функциональный пульт управления реактором и математические модели, нейтронно-физические и теплофизические, обеспечивающие моделирование процессов инженерной точности. Тип ЭВМ: IBM PC-совмест. ПК; ОС: Windows 10 и выше.
- ПубликацияОткрытый доступГлоссарий «Высшее образование»(НИЯУ МИФИ, 2024) Тихомиров, Г. В.; Рыжов, С. Н.; Рыжов, Сергей Николаевич; Тихомиров, Георгий ВалентиновичГлоссарий содержит специализированные термины, понятия и определения в области высшего образования, включая структуру, организацию и методологию. Рассмотрены следующие тематические области высшего образования: общие термины, методические подходы и образовательные технологии, регламентация и документационное сопровождение, структура образования, организация высшего образования, ассоциации и организации высшего образования. Глоссарий является частью методических рекомендаций методического центра «Передовые инженерные школы» Национального исследовательского ядерного университета «МИФИ» (МЦ ПИШ НИЯУ МИФИ) и составлен для передачи передовым инженерным школам (ПИШ) для облегчения процесса обмена опытом в области передовых практик инженерного образования и взаимодействия с индустриальными партнерами между ПИШ.
- ПубликацияОткрытый доступStudy the neutronic feasibility of using Zr as an energy regulator instead of traditional methods(2021) Abdelghafar, Galahom A.; Elazaka, A. I.; Tikhomirov, G. V.; Тихомиров, Георгий Валентинович© 2021 John Wiley & Sons LtdThe control of the reactor energy increases the reactor fuel cycle time. In this work, a new method has been investigated to control the reactor energy instead of traditional methods. SERPENT2 version 2.1.30 was used to investigate the possibility of using Zirconium rods as an energy regulator in the VVER-1000. Zirconium rods were used as water displacers. The effect of different Zr rod diameter on the infinite multiplication factor (k∞) of the reactor and the fuel concentration at different fuel burnup steps has been analyzed. Larger fuel pitches have been investigated to increase the Zr rod diameter. The main safety parameters such as the void volume reactivity coefficients, the Doppler reactivity coefficients and the Moderator temperature coefficient have been studied at different fuel pitch and different Zr rod diameter. A comparison between the effect of Zr rods and boric acid on the reactor reactivity proved the efficiency of using Zr rods as reactivity regulation.
- ПубликацияТолько метаданныеTraining for the developing nuclear power(2019) Putilov, A. V.; Strikhanov, M. N.; Tikhomirov, G. V.; Путилов, Александр Валентинович; Стриханов, Михаил Николаевич; Тихомиров, Георгий Валентинович; Факультет бизнес-информатики и управления комплексными системами© 2019 Obninsk Institute for Nuclear Power Engineering, National Research Nuclear University 'MEPhI'. All rights reserved.The article briefly describes the history of training for the nuclear industry and sets tasks for its improvement and development to ensure the future growth of nuclear power. Within the emerging digital economy, a new phenomenon is digital platforms: they blur the boundaries between industries, form new unexpected industrial alliances, even new industries. Innovative activities in the energy sector, including nuclear power, should enable the formation of digital economic platforms in various energy segments, as well as training for the use of this new tool. Rosatom state Corporation is currently constructing more than thirty new NPP projects in Russia and 12 other countries. This requires educational support and for this purpose a Consortium of supporting universities of the state Corporation «Rosatom», which includes 18 specialized universities. More than half of them train personnel directly for the design, creation and operation of nuclear power plants. The scale of the necessary personnel training in the near future shows that we need a new «educational paradigm», which can be described as «front-line education» - training for the development of digital economy technologies at the same time throughout the «front». This front extends from students preparing for admission to universities, to personnel in the workplace, the training of which, as production personnel, should be carried out taking into account the peculiarities of the digital transformation of production. Partnership is one of the leading values of the modern young generation. To maintain a high level of competition for the best staff, organizations must not only be imbued with a culture of partnership from within, but also act as reliable partners for each other in training and attracting young employees.
- ПубликацияТолько метаданныеTransmutation of americium and neptunium in the single-fluid double-zone thorium-based molten salt reactor(2021) Ashraf, O.; Tikhomirov, G. V.; Тихомиров, Георгий Валентинович© 2021 Elsevier B.V.In the current work, we introduce a new approach compared to solid-fuel reactors to load the minor actinides (MAs) into the Single-fluid Double-zone Thorium-based Molten Salt Reactor (SD-TMSR). The proposed approach merges the advantages of both homogeneous and heterogeneous approaches. Among MAs nuclides, 241Am and 237Np are selected for transmutation due to their long half-life. We simulate two separate tanks; Pu + U tank and FPs tank. In this study, a tank is a right cylinder with a volume of 1.0 m3. The Pu + U tank is used to store Pu and U isotopes extracted from the central channel of the SD-TMSR. However, the FPs tank is used to store all fission products (FPs) produced from the transmutation process in the central channel. The overall change in the actinides and FPs mass during the irradiation has been calculated using direct SERPENT-2 calculations. The results show that the transmutation ratio of 241Am and 237Np reaches 98.5% and 93.2%, respectively after 1500 days of irradiation. We notice that the major isotope in the Pu + U tank is 238Pu. Under 241Am irradiation, our proposed approach offers ≈0.3kg of 238Pu after 1 year of operation. However, under 237Np irradiation, 2.5 times more 238Pu can be extracted after the same period of operation. The produced 238Pu can be used in the radioisotope thermoelectric generators (RTG, RITEG) and radioisotope heater units.
- ПубликацияТолько метаданныеCurrent status of SMRs and S&MRs development in the world(2023) Pioro, I. L. ; Duffey, R. B. ; Kirillov, P. L. ; Dort-Goltz, N. ; Тихомиров, Георгий Валентинович; Смирнов, Антон Дмитриевич; Smirnov, A. D.; Tikhomirov, G. V.This chapter examines Small Modular Reactors (SMRs), which are modular-type nuclear reactors with installed capacities ≤ 300 MWel with claimed features of “modularity” in design, production, and/or construction, and Small- and Medium-size Reactors (S&MRs), with installed capacities ≤ 300 MWel (Small) and > 300–700 MWel (Medium-size), many having claimed features of “modularity” in design, production, and/or construction. The requirements and objectives for any and all new nuclear reactors of any and all sizes are given as: safer than previous “generations”; having low financial risk exposure and capital cost; ease and speed of build; readily licensable; simple to operate and secure; assured fuel supply and sustainability; providing social value and acceptance; and still being competitive. Existing SMRs and S&MRs are tabulated by type, country, and status. Although many SMR designs and concepts have been proposed, Russia is the first country in the world to develop, design, and put into operation two SMRs, and Russian technology is examined in detail in this chapter, with numerous diagrams and photos of various systems provided.
- ПубликацияОткрытый доступExperience of projects aimed at attraction and development of young experts in the international scientific and technological programs(2020) Pershukov, V. A.; Tikhomirov, G. V.; Першуков, Вячеслав Александрович; Тихомиров, Георгий Валентинович© 2020 IOP Publishing Ltd. All rights reserved.The report reviews international organizations practices related to attraction of students and young researchers as trainees and participants of contests for implementation of large projects such as Mega-Science. Organizational frameworks are presented, which are used for these purposes in The Nuclear Energy Agency (NEA), the International Atomic Energy Agency (IAEA),European Nuclear Education Network (ENEN), European Nuclear Research Center (Conseil européen pour la recherche nucléaire (CERN)), The Generation IV International Forum (GIF), et. The role of international organizations in formation of scientific personnel with the great potential in arrangement of the international scientific cooperation has been determined. The classification of measures aimed at identification and development of scientific personnel was proposed: from studying at the university till working in the international organization.
- ПубликацияОткрытый доступAnalysis of the methods for group constants generation for calculation of a large SFR core using Serpent 2 and CriMR codes(2020) Gerasimov, A. S.; Akpuluma, D. A.; Smirnov, A. D.; Pugachev, P. A.; Tikhomirov, G. V.; Смирнов, Антон Дмитриевич; Пугачев, Павел Александрович; Тихомиров, Георгий Валентинович© Published under licence by IOP Publishing Ltd.This work aimed at generating homogenized group constants using the Serpent code and then using the CriMR diffusion code to model the large SFR OECD 3600 MWth MOX core. The results were compared with a full core reference Monte Carlo solution by Serpent. Reactivity feedback parameters were also considered. Generating the group constants from separate fuel assemblies allows for simultaneously carrying out calculations and then using the results as input in diffusion codes rather than waiting so long for a 3D full core Monte Carlo calculation to be completed. From the results of the integral parameters we see a close agreement in the calculation codes. The differences can be attributed to the errors that could arise from generating the constants from individual sub-assemblies. The differences in the underlying physics and approximations used in development of the codes could also be a factor. Another way the errors could be reduced is by checking to see that the sub-assembly configurations used in the non-multiplying zones are as close as possible to the real layout in a full 3D core.
- ПубликацияТолько метаданныеComparative Assessment of the Range of Spectral Regulation of Reactivity Margin for Fuel Burnup in Pressurized Water Reactors Using Zirconium Displacers for Uranium and Thorium Fuel Cycles(2022) Elazaka, A. I.; Savander, V. I.; Tikhomirov, G. V.; Савандер, Владимир Игоревич; Тихомиров, Георгий Валентинович
- ПубликацияОткрытый доступProspective methods for optimization of minor actinides transmutation technology(2020) Ryzhov, S. N.; Tikhomirov, G. V.; Рыжов, Сергей Николаевич; Тихомиров, Георгий Валентинович© Published under licence by IOP Publishing Ltd.Among the various international policies for the management of spent nuclear fuel and radioactive waste (RW), an important issue is the need to reprocess this waste. The aim of this work is to analyze current modern methods for transmutation of minor actinides (MA) in the reactor cores of thermal, fast (with homogeneous and heterogeneous placement) and in accelerated driven systems in order to identify factors limiting the efficiency of transmutation. This work is an analytical review and it defines the main methods for removing the limitations of the effectiveness of the transmutation process. On the basis of MA formation sources data and MA decay chains, namely americium, neptunium and curium, as well as transmutation methods in the latest reactor systems, factors limiting the efficiency of the transmutation process and methods of reducing their influence are investigated. The main factors are: an increased level of gassing during transmutation, industrial restrictions and the influence of the transmutation process on the processes occurring in the core during transient processes. The main current problem of transmutation is the high activity in terms of heat release level and neutron emission of irradiated assemblies due to the presence of curium isotopes.