Problems of Atomic Science and Technology最新文献_第2页

IODINE FILTER CONTROL STAND (SKIF) FOR CERTIFICATION CARBON SORBENT VENTILATION SYSTEMS OF NPP 用于认证 NPP 碳吸附剂通风系统的碘过滤器控制台（SKIF）

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Problems of Atomic Science and Technology Pub Date : 2024-04-11 DOI: 10.46813/2024-150-129

V. Levenets, V. Sokolenko, E. Vinokurov, O. Lonin, O. P. Omelnyk, R. M. Sibileva, A. Shchur

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DEVELOPMENT AND OPTIMIZATION OF OZONE DESTRUCTOR FOR LOW-TEMPERATUTE PLASMA STERILIZER 开发和优化用于低温等离子体灭菌器的臭氧破坏器

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Problems of Atomic Science and Technology Pub Date : 2024-04-11 DOI: 10.46813/2024-150-125

A. Lozina, I. Garkusha, A.V. Taran, V. Makhlai, R.O. Pavlichenko, O.G. Chechelnitskij, Y. Gnidenko, P. Vorontsov

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MULTILAYER TUNGSTEN/QUASI-CRYSTAL Ti-Zr-Ni SYSTEMS AS PROMISING MATERIALS OF PROTECTIVE ELEMENTS A FUSION REACTOR 多层钨/准晶体钛-锆-镍系统有望成为聚变反应器保护元件的材料

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Problems of Atomic Science and Technology Pub Date : 2024-04-11 DOI: 10.46813/2024-150-028

Oleksander Devizenko, I. Kopylets, S. Malykhin, V. V. Kondratenko, V. Makhlai, I. Garkusha, D.V. Lytvinyuk, S. Surovitskiy

{"title":"MULTILAYER TUNGSTEN/QUASI-CRYSTAL Ti-Zr-Ni SYSTEMS AS PROMISING MATERIALS OF PROTECTIVE ELEMENTS A FUSION REACTOR","authors":"Oleksander Devizenko, I. Kopylets, S. Malykhin, V. V. Kondratenko, V. Makhlai, I. Garkusha, D.V. Lytvinyuk, S. Surovitskiy","doi":"10.46813/2024-150-028","DOIUrl":"https://doi.org/10.46813/2024-150-028","url":null,"abstract":"This paper presents the results of fabricating a model sample of a multilayer coating on a Al2O3 substrate, which consisted of 30 periods of alternately deposited 10.5-nm-thick layers of Ti41Zr41Ni18 and 2.5-nm-thick layers of W. The effect of annealing for 1 h at 500, 600, and 700 °C was studied. Characterization of the phase and structural state of the coating by X-ray diffractometry and small-angle X-ray reflectometry was carried out. It was found that during the annealing process, the tungsten layers in the multilayer composition did not undergo significant changes, and all alterations occur only in the Ti41Zr41Ni18 layers. Annealing affected the thickness of the layers, density, and interlayer roughness. It has been experimentally shown that the phase transformation ”quasicrystal → 2/1 crystalline approximant” is accompanied by an 8.3% volume increase compared to the volume of the quasicrystalline phase, but this does not lead to the destruction of the periodic composition. The multilayer structure proved to be resistant to high temperatures and, despite phase changes, did not lose its bond with the substrate. The used combination of materials and the high annealing temperature did not generate significant internal stresses or mechanical damage. The results obtained in this study allow for the further controlled formation of layered quasicrystal/tungsten microsystems of various designs with different layer thicknesses. The next perspective involves conducting practical tests with plasma to study the radiation-thermal impact.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140715545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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SIMULATION OF RADIONUCLIDE PROPAGATION AT EXTERNAL EXTREME EVENTS IN THE NPP AREA 模拟核电站区域外部极端事件的放射性核素传播

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Problems of Atomic Science and Technology Pub Date : 2024-04-11 DOI: 10.46813/2024-150-041

N.A. Azarenkov, M. Kozhevnikova, V. Levenets

{"title":"SIMULATION OF RADIONUCLIDE PROPAGATION AT EXTERNAL EXTREME EVENTS IN THE NPP AREA","authors":"N.A. Azarenkov, M. Kozhevnikova, V. Levenets","doi":"10.46813/2024-150-041","DOIUrl":"https://doi.org/10.46813/2024-150-041","url":null,"abstract":"At the current stage of electric-power industry development in Ukraine, the issues of energy safety and energy independence are becoming increasingly important. Being the largest among others in Europe, Zaporizhzhia Nuclear Power Plant (ZNPP) has a large dry storage facility for spent nuclear fuel. The armed attack of Russia has endangered nuclear and physical safety in Ukraine. Beginning on 24 February, 2022, the hostilities were activated in the country. The activization of the warfare has led to the capture of the ZNPP by the Russian militaries (4 March, 2022) and to their presence of the ZNPP. This situation causes justifiable concern about the potential detrimental effect on the nuclear and physical safety under service conditions of nuclear power units and at radioactive sourcerelated activities. This paper is concerned with simulation of the radionuclide propagation under external extreme events in the NPP zone, using the ZNPP as an example. The transfer of 137Cs radionuclide has been simulated for the\u0000hypothetical ZNPP failure at meteorological conditions as of 23 to 25 August, 2022. According to the simulation data, throughout 23–25 August, 2022, the highest 137Cs concentration values might be observed within the Ukraine territory, particularly in the near-field zone, 50…100 km in radius, from the emission point. Besides, the radioactive\u0000impurities could be carried off to the neighboring state areas.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140713815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

NUMERICAL MODELING OF HIDDEN DAMAGE ACCUMULATION DUE TO RADIATION EXPOSURE AND HYDROGEN EMBRITTLEMENT 辐照和氢脆导致的隐性损伤累积的数值建模

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Problems of Atomic Science and Technology Pub Date : 2024-04-11 DOI: 10.46813/2024-150-003

D. Breslavsky, Oksana Tatarinova, Galyna Tolstolutska, Holm Altenbach

{"title":"NUMERICAL MODELING OF HIDDEN DAMAGE ACCUMULATION DUE TO RADIATION EXPOSURE AND HYDROGEN EMBRITTLEMENT","authors":"D. Breslavsky, Oksana Tatarinova, Galyna Tolstolutska, Holm Altenbach","doi":"10.46813/2024-150-003","DOIUrl":"https://doi.org/10.46813/2024-150-003","url":null,"abstract":"An approach that allows using the qualitative results of the analysis of the so-called \"mechanism based\" evolution equations, i.e. constructed using experiments at the micro- and meso-level, to determine the structure of the equation for another, similar in composition, material, is proposed. To determine damage due to irradiation influence, the classical method of Continuum Damage Mechanics was used. The proposed approach of qualitative reproduction of the effects of damage accumulation was used due to the lack of experimental data on the long-term behavior of the material under consideration (steel 08X18N9T) under the given conditions of temperature and\u0000radiation exposure. The previously studied influence of the effects of various processes on the hidden damage accumulation was used to reproduce it in the proposed equation. The influence of the type of stress state due to the invariants of the stress tensor and deviator is taken into account. The effect of hydrogen embrittlement is reflected\u0000using known data from experiments performed at the macro level, taking into account changes in the modulus of elasticity. The resulting function entered the evolution equation in an exponential form. The developed evolution equation for the damage parameter is added to the previously proven method and software for modeling structural elements exposed to thermal, force and irradiation fields. Examples of the analysis of problems of deformation, damage and fracture of specimens and a tube with a hole, in which the behavior of the corresponding zones of the reactor baffle is simulated, are provided. The performed numerical calculations showed the possibility of practical assessment of the deformed state and the level of acquired hidden damage.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140715460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

STRUCTURE AND PROPERTIES OF THE NITROGENATED LAYER OF X40CrMoV5-1-1 STEEL OBTAINED IN THE ION-PLASMA TWO-STAGE VACUUM-ARC DISCHARGE 离子-等离子体两级真空-气相沉降法获得的 X40CrMoV5-1-1 钢氮化层的结构和性能

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Problems of Atomic Science and Technology Pub Date : 2024-04-11 DOI: 10.46813/2024-150-115

L. M. Deyneko, V.O. Stolbovyy, N. Romanova, L. Kryvchyk, V. Pinchuk

引用次数: 0

CRITERIA AND CONDITIONS OF THERMAL HYDRODYNAMIC INSTABILITY IN THE CIRCUITS OF NATURAL CIRCULATION OF NUCLEAR POWER PLANTS IN CASE OF LEAK ACCIDENTS 发生泄漏事故时核电站自然循环回路中热流体力学不稳定性的标准和条件

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Problems of Atomic Science and Technology Pub Date : 2024-04-11 DOI: 10.46813/2024-150-066

V. Skalozubov, Yu.O. Komarov, O. Dorozh, A.V. Kanivets, V. Filatov

{"title":"CRITERIA AND CONDITIONS OF THERMAL HYDRODYNAMIC INSTABILITY IN THE CIRCUITS OF NATURAL CIRCULATION OF NUCLEAR POWER PLANTS IN CASE OF LEAK ACCIDENTS","authors":"V. Skalozubov, Yu.O. Komarov, O. Dorozh, A.V. Kanivets, V. Filatov","doi":"10.46813/2024-150-066","DOIUrl":"https://doi.org/10.46813/2024-150-066","url":null,"abstract":"In today's extreme conditions of operation of nuclear power plants (NPP) of Ukraine, the need to improve systems and strategies for managing accidents with complete long-term blackout (CLTB) is especially urgent. A method of determining the conditions for the occurrence of thermal hydrodynamic instability (THI) in passive safety systems with natural circulation circuits (PSS NC) has been developed, based on the fundamental thermodynamic principles of analyzing the impact on stability of fluctuating deviations of pressure and mass flow of the working medium from the established (equilibrium) state. Using the examples of the small modular reactor (SMP) and the high power reactor (АР1000) of the Westinghouse company, the criteria and conditions of THI in accidents with leaks in the natural circulation circuits of the NPP are defined in a general format. The developed method of determining the criteria and conditions of THI in PSS NC can be applied by design, operating and regulatory organizations for deterministic analysis of the safety of NPPs of the AP/SMP type.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140714117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

TAGGING EFFICIENCY ESTIMATION IN EXPERIMENTS WITH A COHERENT BREMSSTRAHLUNG BEAM 相干轫致辐射光束实验中的标记效率估算

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Problems of Atomic Science and Technology Pub Date : 2023-12-12 DOI: 10.46813/2023-148-039

D. Burdeinyi, V. Ganenko

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FEATURES OF STRUCTURAL DAMAGES OF SURFACE OF TUNGSTEN AS A RESULT OF IRRADIATION WITH HELIUM ION BEAMS WITH ENERGY 4 MeV 4 兆电子伏氦离子束辐照对钨表面结构损伤的特征

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Problems of Atomic Science and Technology Pub Date : 2023-12-12 DOI: 10.46813/2023-148-033

O. Manuilenko, E. Prokhorenko, K. V. Pavlii, B. V. Zajtsev, S.N. Dubniuk, V. Lytvynenko, T. G. Prokhorenko

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SLOW ELECTROMAGNETIC WAVES IN PLANAR THREE-COMPONENT WAVEGUIDE STRUCTURE WITH MU-NEGATIVE METAMATERIAL 带有μ负超材料的平面三分量波导结构中的慢电磁波

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Problems of Atomic Science and Technology Pub Date : 2023-12-12 DOI: 10.46813/2023-148-058

V. Galaydych, A. Sporov, V. Olefir, N. Azarenkov

引用次数: 0