Research of Reactor Radiation Influence upon Processes of Hydrogen Isotopes Interaction with Materials of the Fusion Facility

Sadvakassova, Aliya O.; Tazhibayeva, I.; Kenzhin, E.A.; Zaurbekova, Zhanna; Kulsartov, T.; Gordiyenko, Y.; Chikhray, Yevgeni

doi:10.13182/fst11-a12398

Cited by 23 publications

(8 citation statements)

References 5 publications

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“…e studies were carried out at the IVG.1 M stationary research nuclear reactor [13,14] at a thermal neutron flux density of up to 1.4 • 10 14 n/cm 2 s. Ionization and excitation of the gaseous medium were carried out by the products of a nuclear reaction:…”

Section: Methodsmentioning

confidence: 99%

Emission of Noble Gases Binary Mixtures under Excitation by the Products of the ⁶Li (n, α)³ H Nuclear Reaction

Samarkhanov

Хасенов

Batyrbekov

et al. 2020

Science and Technology of Nuclear Installations

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The luminescence of Kr-Xe, Ar-Kr, and Ar-Xe mixtures was studied in the spectral range 300–970 nm when excited by 6Li (n, α)3 H nuclear reaction products in the core of a nuclear reactor. Lithium was deposited on walls of experimental cell in the form of a capillary-porous structure, which made it possible to measure up to a temperature of 730 K. The temperature dependence of the radiation intensity of noble gas atoms, alkali metals, and heteronuclear ionic noble gas molecules was studied. Also, as in the case of single-component gases, the appearance of lithium lines and impurities of sodium and potassium is associated with vaporization during the release of nuclear reaction products from the lithium layer. The excitation of lithium atoms occurs mainly as a result of the Penning process of lithium atoms on noble gas atoms in the 1s states and subsequent ion-molecular reactions. Simultaneous radiation at transitions of atoms of noble gases and lithium, heteronuclear ion molecules of noble gases allows us to increase the efficiency of direct conversion of nuclear energy into light.

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Section: Methodsmentioning

confidence: 99%

Emission of Noble Gases Binary Mixtures under Excitation by the Products of the ⁶Li (n, α)³ H Nuclear Reaction

Samarkhanov

Хасенов

Batyrbekov

et al. 2020

Science and Technology of Nuclear Installations

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“…As a source of neutron and gamma radiation in experiments the IVG.1M research reactor [16] was used. A flux of neutrons in the core center of the IVG.1M reactor at power level of 1 MW is given in Table 1 below.…”

Section: Experimental Facilitiesmentioning

confidence: 99%

Methodology of the Experiments to Study Lithium CPS Interaction with Deuterium Under Conditions of Reactor Irradiation

Ponkratov

Nikitenkov

Tazhibayeva

et al. 2019

Eurasian Chem. Tech. J.

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Problems of plasma-facing materials degradation and in-vessel element destructions, tritium accumulation and plasma pollution can be overcome by the use of liquid metals with low atomic number. The best candidate as a material for divertor receiving plates and other in-vessel devices is lithium. One of the problems associated with the use of such lithium systems in the fusion reactors is to determine the parameters of the working gases interaction with plasma facing surfaces under conditions simulating real operation, i.e. under conditions of neutron and gamma radiation. This paper describes a technique of the reactor experiments to study lithium capillary-porous systems (CPS) interaction with deuterium under neutron irradiation. The neutron-physical and thermophysical calculations were the basis for the design development and further manufacture of a unique irradiation ampoule device with a lithium CPS sample. Several experiments were performed to calibrate the deuterium fluxes through experimental cell with lithium CPS; and preliminary results of these experiments were obtained.

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“…Исследования параметров генерации и выделения трития из литийсодержащих материалов проводились на экспериментальном стенде ЛИАНА [23,24], расположенном на исследовательском реакторе ИВГ.1М Института атомной энергии НЯЦ РК в городе Курчатов (Казахстан). Конструкция ампульного устройства (АУ), разработанного для размещения исследуемых образцов в экспериментальном канале реактора, приведена в работах [22,25].…”

Section: методика и условия проведения экспериментовunclassified

STUDY OF TRITIUM AND HELIUM GENERATION IN LITHIUM-CONTAINING MATERIALS AND THEIR RELEASE (Review)

Zaurbekova¹,

Ситников²,

Kulsartov³

et al. 2018

PAST-TF

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В обзоре представлены результаты реакторных испытаний литийсодержащих материалов: литиевой керамики Li 2 TiO 3 , свинцоволитиевой эвтектики Li 17 Pb 83 , литиевой капиллярно-пористой системы (КПС) и лития. Обогащение лития по изотопу 6 Li для всех материалов составляло 7,52%. В экспериментах по облучению наблюдалось, что выделение атомов гелия для литийсодержащих материалов превышает выделение атомов трития, так как гелий инертен и не взаимодействует с другими атомами материалов, а также имеет практически безактивационный характер десорбции с открытой поверхности материалов. На выделение гелия оказывает существенное влияние неравномерность энерговыделения по образцу в условиях облучения, что приводит к появлению пиков на графиках газовыделения из образцов. Наблюдаемые пики выделения могут быть вызваны процессом конвективных перемешиваний жидкометаллических литиевых систем в приповерхностном слое. Наиболее существенным процессом, влияющим на выделение трития, является его взаимодействие с атомами лития, в результате которого образуется или распадается тритид лития. Температурная зависимость выделения трития из материала может иметь различный характер: для лития и литиевой КПС увеличение температуры образца приводит к увеличению выделения трития, что вызвано увеличением концентрации свободных атомов трития в поверхностном слое за счёт ускорения распада молекулы LiT и ускорением диффузионных процессов; для свинцоволитиевой эвтектики увеличение температуры образца приводит к снижению выделения трития, что вызвано появлением в эвтектике локальных неоднородностей, приводящих к изменению соотношения атомов лития к атомам свинца по объёму образца; для литиевой керамики наблюдается стабильное выделение трития при всех исследованных температурах. Описаны расчётные модели, по которым определён ряд параметров взаимодействия трития с исследованными материалами.Ключевые слова: тритий, гелий, литий, литиевая керамика Li 2 TiO 3 , свинцово-литиевая эвтектика Li 17 Pb 83 , литиевая капиллярно-пористая система (КПС), нейтронное облучение.The article presents the results of reactor tests of lithium-containing materials: lithium ceramics Li 2 TiO 3 , lead-lithium eutectic Li 17 Pb 83 , lithium capillary-porous system (CPS) and lithium. The enrichment of lithium by the 6 Li isotope for all materials was 7.52%. In experiments with irradiation, it was observed that the release of helium atoms from lithium-containing materials exceeds the emission of tritium atoms, since helium is inert and does not interact with other material atoms, and also has a virtually no activation nature of desorption from the open surface of the materials. The release of helium is significantly affected by the unevenness of energy release over the sample under irradiation conditions, which leads to the appearance of peaks at a general level of helium emission. The observed emission peaks can be caused by convective mixing of liquid metal lithium systems in the near-surface layer. The most significant process affecting tritium release is its interaction with li...

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Research of Reactor Radiation Influence upon Processes of Hydrogen Isotopes Interaction with Materials of the Fusion Facility

Cited by 23 publications

References 5 publications

Emission of Noble Gases Binary Mixtures under Excitation by the Products of the ⁶Li (n, α)³ H Nuclear Reaction

Emission of Noble Gases Binary Mixtures under Excitation by the Products of the ⁶Li (n, α)³ H Nuclear Reaction

Methodology of the Experiments to Study Lithium CPS Interaction with Deuterium Under Conditions of Reactor Irradiation

STUDY OF TRITIUM AND HELIUM GENERATION IN LITHIUM-CONTAINING MATERIALS AND THEIR RELEASE (Review)

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Research of Reactor Radiation Influence upon Processes of Hydrogen Isotopes Interaction with Materials of the Fusion Facility

Cited by 23 publications

References 5 publications

Emission of Noble Gases Binary Mixtures under Excitation by the Products of the 6Li (n, α)3 H Nuclear Reaction

Emission of Noble Gases Binary Mixtures under Excitation by the Products of the 6Li (n, α)3 H Nuclear Reaction

Methodology of the Experiments to Study Lithium CPS Interaction with Deuterium Under Conditions of Reactor Irradiation

STUDY OF TRITIUM AND HELIUM GENERATION IN LITHIUM-CONTAINING MATERIALS AND THEIR RELEASE (Review)

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Emission of Noble Gases Binary Mixtures under Excitation by the Products of the ⁶Li (n, α)³ H Nuclear Reaction

Emission of Noble Gases Binary Mixtures under Excitation by the Products of the ⁶Li (n, α)³ H Nuclear Reaction