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STUDY THE ISOMERIC RATIOS IN PHOTONUCLEAR EXPERIMENTS ON THE LUE-40 LINAC RDC “ACCELERATOR” NSC KIPT 在 LUE-40 LINAC RDC "加速器 "NSC KIPT 上研究光核实验中的异构体比率
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-11-06 DOI: 10.46813/2023-148-008
I. S. Timchenko, O. S. Deiev, S. Olejnik, S. Potin, V. Kushnir, V. Mytrochenko, S. Perezhogin
{"title":"STUDY THE ISOMERIC RATIOS IN PHOTONUCLEAR EXPERIMENTS ON THE LUE-40 LINAC RDC “ACCELERATOR” NSC KIPT","authors":"I. S. Timchenko, O. S. Deiev, S. Olejnik, S. Potin, V. Kushnir, V. Mytrochenko, S. Perezhogin","doi":"10.46813/2023-148-008","DOIUrl":"https://doi.org/10.46813/2023-148-008","url":null,"abstract":"The results of photoproduction of isomeric pairs from the (γ,xn) and (γ,pxn) reactions on nuclei from Zr up to Ta at the bremsstrahlung end-point energy range 30…100 MeV are systematized. Measurements were performed at the electron beam of the LUE-40 linac RDC “Accelerator” NSC KIPT using the activation method and off-line γ-ray spectrometric technique. The theoretical isomeric ratios IR for the nuclei-products of studied reactions were calculated using the cross-sections σ(E) from the TALYS1.95 code for six different level density models. The data from the international databases were additionally used to compare experimental results and theoretical predictions. The obtained results let us make conclusions about trends of values and energy dependence of IR in studied photonuclear reactions. Further directions of experimental research in the RDC “Accelerator” NSC KIPT are discussed.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139288252","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
BEHAVIOUR OF MAGNESIUM POTASSIUM PHOSPHATE CEMENT UNDER LEACHING 磷酸镁钾水泥在浸出作用下的行为
Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-068
S.Y. Sayenko, V.A. Shkuropatenko, Y.O. Svitlychnyi, S.O. Karsim, D.V. Kutnii, A.V. Zykova, K.V. Lobach
{"title":"BEHAVIOUR OF MAGNESIUM POTASSIUM PHOSPHATE CEMENT UNDER LEACHING","authors":"S.Y. Sayenko, V.A. Shkuropatenko, Y.O. Svitlychnyi, S.O. Karsim, D.V. Kutnii, A.V. Zykova, K.V. Lobach","doi":"10.46813/2023-147-068","DOIUrl":"https://doi.org/10.46813/2023-147-068","url":null,"abstract":"The effectiveness of the use of magnesium potassium phosphate cements (MKPC) as protective matrices for radioactive waste was investigated in this work from the point of view of the main elements leaching. Fly ash and blast-furnace slag were used as MKPC fillers. Leaching tests were performed on monolithic MKPC samples according to ANSI/ANS 16.1 test. Based on the obtained data, the cumulative leaching fractions, leaching mechanisms, effective diffusion coefficients and leaching indices K, Mg, P, B, Si, Al, and Ca were determined. The values of the calculated leaching indices (>10) of the constituent elements indicate that the characteristics of the studied MKPC matrix are acceptable for radioactive waste immobilization.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136013770","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
FEATURES OF MODIFICATIONS IN THE RE-SOLIDIFIED SURFACES OF ADVANCED MATERIALS DUE TO HIGH-POWER PLASMA PULSES 高能等离子体脉冲对先进材料再固化表面的影响
Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-015
S.S. Herashchenko, V.A. Makhlai, I.E. Garkusha, Yu.V. Petrov, N.N. Aksenov, N.V. Kulik, D.V. Yelisyeyev, P.B. Shevchuk, Y.E. Volkova, T.M. Merenkova, M. Wirtz
{"title":"FEATURES OF MODIFICATIONS IN THE RE-SOLIDIFIED SURFACES OF ADVANCED MATERIALS DUE TO HIGH-POWER PLASMA PULSES","authors":"S.S. Herashchenko, V.A. Makhlai, I.E. Garkusha, Yu.V. Petrov, N.N. Aksenov, N.V. Kulik, D.V. Yelisyeyev, P.B. Shevchuk, Y.E. Volkova, T.M. Merenkova, M. Wirtz","doi":"10.46813/2023-147-015","DOIUrl":"https://doi.org/10.46813/2023-147-015","url":null,"abstract":"The surface modification of advanced materials was studied through a series of repetitive plasma pulses caused tungsten melting. Features of the affected surface layers in reference materials (IGP W, AM W/WTa, Hastelloy, and EUROFER) for both fusion and fission applications were explored after exposure to plasma in the facilities (QSPA, MPC, and PPA) with different durations of plasma pulses. A detailed surface analysis was carried out with Scanning Electron Microscopy. It was found that the plasma treatment led to the formation of a modified layer as a result of the rapid re-solidification of the exposed surface. The fine cellular structures appeared in the re-solidified layers of the irradiated materials, with typical cell sizes ranging from 150 to 500 nm. An increase in the roughness of the exposed surfaces was attributed to the presence of the cracks and re-solidified layer.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136013921","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
DAMAGE TO THE HEAT EXCHANGE SURFACE OF STEAM GENERATOR PGV-1000 蒸汽发生器pgv-1000热交换面损坏
Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-091
S.V. Gozhenko, Y.O. Krainiuk, A.S. Mitrofanov
{"title":"DAMAGE TO THE HEAT EXCHANGE SURFACE OF STEAM GENERATOR PGV-1000","authors":"S.V. Gozhenko, Y.O. Krainiuk, A.S. Mitrofanov","doi":"10.46813/2023-147-091","DOIUrl":"https://doi.org/10.46813/2023-147-091","url":null,"abstract":"A comprehensive analysis of the damaged heat exchange surface of the PGV-1000 steam generator during long-term operation, their relationship with hydrodynamic, water-chemical regimes and surface properties was conducted. The methods of minimization of damages during the operation of Ukraine's NPP are considered.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136013768","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
EFFECT OF THERMOCHEMICAL TREATMENT ON THE Zr-1%Nb ALLOY CHARACTERISTICS 热化学处理对Zr-1%Nb合金性能的影响
Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-052
V.S. Trush, P.I. Stoev, M.A. Tikhonovsky, V.А. Panov, V.M. Fedirko, T.M. Tikhonovska, I.M. Pohrelyuk, A.G. Luk’yanenko, V.M. Korendiy, S.M. Lavrys
{"title":"EFFECT OF THERMOCHEMICAL TREATMENT ON THE Zr-1%Nb ALLOY CHARACTERISTICS","authors":"V.S. Trush, P.I. Stoev, M.A. Tikhonovsky, V.А. Panov, V.M. Fedirko, T.M. Tikhonovska, I.M. Pohrelyuk, A.G. Luk’yanenko, V.M. Korendiy, S.M. Lavrys","doi":"10.46813/2023-147-052","DOIUrl":"https://doi.org/10.46813/2023-147-052","url":null,"abstract":"Data on improving the characteristics of fuel rods made of the Zr-1%Nb alloy by modifying the near-surface layer are presented. For modification, thermochemical treatment (TCT) was used in a controlled gas environment based on the diffuse oxygen saturation of the near-surface layer. It was established that TCT does not reduce the mechanical characteristics of the Zr-1%Nb alloy compared to ones in the initial state, but in some cases increases its. The influence of different regimes of TCT on the features of oxidation in air and hydrogen saturation of the Zr-1%Nb alloy was considered. It was shown that the optimal regime of TCT provides a reduction in weight gain during oxidation at a temperature of 550 °C in the air for 100 h, and prevents saturation with hydrogen of Zr-1%Nb alloy. It was concluded that the TCT is a promising method for improving the performance of Zr-1%Nb alloy fuel rods.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136013914","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
SYNTHESIS, STRUCTURE AND PROTECTIVE PROPERTIES OF PVD MAX PHASE COATINGS. A REVIEW. PART I. MAX PHASE COATINGS DEPOSITION PVD Max相涂层的合成、结构及防护性能。复习一下。第一部分:最大相涂层沉积
Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-111
E.N. Reshetnyak, A.S. Kuprin, T.A. Prikhna, M.A. Bortnitskaya, V.A. Belous
{"title":"SYNTHESIS, STRUCTURE AND PROTECTIVE PROPERTIES OF PVD MAX PHASE COATINGS. A REVIEW. PART I. MAX PHASE COATINGS DEPOSITION","authors":"E.N. Reshetnyak, A.S. Kuprin, T.A. Prikhna, M.A. Bortnitskaya, V.A. Belous","doi":"10.46813/2023-147-111","DOIUrl":"https://doi.org/10.46813/2023-147-111","url":null,"abstract":"In recent decades, MAX phases have attracted considerable attention from the scientific community due to their unique combination of metallic and ceramic properties, which provide exceptional mechanical, thermal, electrical and chemical characteristics. The synthesis of MAX phases in the form of coatings is of increasing interest for many applications. The aim of this review is to summarize the progress made in the synthesis of coatings based on MAX phases using different methods. The advantages and characteristics of the implementation of ion-plasma physical vapor deposition methods are discussed. The use of ion-plasma methods allows to significantly reduce the synthesis temperature of MAX phases due to the high energy of the particles forming the coating. The effect of deposition parameters on the composition, structure and properties of the coatings is analyzed. Coatings with high protective properties and prospects for their application in industry are considered. This part of the review focuses on methods for depositing MAX phase based coatings.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136013919","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
RESEARCH INTO THE EFFECT OF PARTICLE SIZE DISTRIBUTION OF NEUTRON-ABSORBING POWDER MATERIALS ON THE COMPACTION IN ABSORBING ROD CLADDINGS 中子吸收粉末材料粒径分布对吸收棒包层压实效果的影响研究
Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-097
I.O. Chernov, M.M. Belash, V.O. Romankov, V.M. Yevseyev, Y.S. Legenkyi
{"title":"RESEARCH INTO THE EFFECT OF PARTICLE SIZE DISTRIBUTION OF NEUTRON-ABSORBING POWDER MATERIALS ON THE COMPACTION IN ABSORBING ROD CLADDINGS","authors":"I.O. Chernov, M.M. Belash, V.O. Romankov, V.M. Yevseyev, Y.S. Legenkyi","doi":"10.46813/2023-147-097","DOIUrl":"https://doi.org/10.46813/2023-147-097","url":null,"abstract":"The results of research into the effect of the granulometric compositions of neutron-absorbing powder materials such as boron carbide, dysprosium titanate and dysprosium hafnate and their mixtures in the initial state on the characteristics of backfills in the claddings of both “short” and full-size absorbing rods are presented. It was revealed that the achievement of the maximum backfill density is facilitated by providing the content of a fine fraction of about 30%. The maximum backfill density values achieved for boron carbide, dysprosium titanate, and dysprosium hafnate were 1.82, 5.1, and 5.82 g/cm3 respectively. The optimal modes of vibration compaction (type and frequency of oscillations), which ensure the achievement of the required values of the backfill density in absorbing rods in a short time were defined.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136013912","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 MECHANICAL PROPERTIES OF Ti-Cr-Al-Nb AND Ti-Cr-Al-Nb-V MULTICOMPONENT ALLOYS Ti-Cr-Al-Nb和Ti-Cr-Al-Nb- v多组分合金的组织和力学性能
Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-059
O.M. Velikodnyi, R.V. Vasilenko, O.S. Kalchenko, I.V. Kolodyi, Y.O. Krainiuk, A.V. Levenets, P.I. Stoev, M.A. Tikhonovsky, G.D. Tolstolutska
{"title":"STRUCTURE AND MECHANICAL PROPERTIES OF Ti-Cr-Al-Nb AND Ti-Cr-Al-Nb-V MULTICOMPONENT ALLOYS","authors":"O.M. Velikodnyi, R.V. Vasilenko, O.S. Kalchenko, I.V. Kolodyi, Y.O. Krainiuk, A.V. Levenets, P.I. Stoev, M.A. Tikhonovsky, G.D. Tolstolutska","doi":"10.46813/2023-147-059","DOIUrl":"https://doi.org/10.46813/2023-147-059","url":null,"abstract":"The empirical and semi-empirical models were used to analyze the phase-structural state of five- and fourcomponent alloys of the Ti-Cr-Al-Nb-V system. Two compositions of lightweight alloys were selected for experimental study: Ti60Cr11Al7Nb11V11 and Ti60Cr11Al7Nb22 (at. %). Ingots of these alloys were obtained by argonarc melting method, and they were subjected to homogenization, deformation by rolling and subsequent annealing at different temperatures. The influence of annealing temperature on the phase-structural state of the alloys, their hardness, and mechanical properties during tensile tests has been studied experimentally. It was found that the change of phase composition and grain size during annealing in the temperature range of 700…900 ºC practically does not affect the hardness and tensile strength of alloys. Annealing at 900 ºC transforms the alloys into a singlephase state with bcc lattice and significantly increases the elongation to fracture, which is about 30% for both alloys. In addition, the yield strength and tensile strength of the five-component alloy are noticeably higher than those of the four-component alloy.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136013916","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
LONG-LIFE PULSED VACUUM-ARC PLASMA SOURCE 长寿命脉冲真空弧等离子体源
Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-152
Iurii Sysoiev, Yurii Shyrokyi, Kseniia Fesenko
{"title":"LONG-LIFE PULSED VACUUM-ARC PLASMA SOURCE","authors":"Iurii Sysoiev, Yurii Shyrokyi, Kseniia Fesenko","doi":"10.46813/2023-147-152","DOIUrl":"https://doi.org/10.46813/2023-147-152","url":null,"abstract":"The design of a pulsed vacuum-arc plasma source with an ignition system based on dielectric surface breakdown is presented and the principle of its operation is described. In the engineered plasma source, a four-section anode is used along with an equal number of arc ignition sections. Additionally, separate power supply circuits are employed for both the main pulsed arc discharge and the arc ignition circuit. Independent operation of each section of this device is carried out, essentially constituting a combination of four pulsed plasma sources in one, the coordinated functioning of which is ensured by the control system. Practical tests of the pulsed plasma source have revealed its advantages as followed: a fourfold increase in the ignition system life-time; achieving uniform depletion of the cathode working surface; and, under specific conditions, enhancing the productivity of the plasma source.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136014041","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
IMPROVING THE STRENGTH AND CORROSION PROPERTIES OF ALUMINIUM ALLOYS WHEN MODIFICATION WITH NANODISPERSED COMPOSITIONS 纳米分散成分改性提高铝合金的强度和腐蚀性能
Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-026
A.V. Davydiuk, N.E. Kalinina, A.F. Sanin, D.B. Hlushkova, S.V. Demchenko, V.O. Sayenko
{"title":"IMPROVING THE STRENGTH AND CORROSION PROPERTIES OF ALUMINIUM ALLOYS WHEN MODIFICATION WITH NANODISPERSED COMPOSITIONS","authors":"A.V. Davydiuk, N.E. Kalinina, A.F. Sanin, D.B. Hlushkova, S.V. Demchenko, V.O. Sayenko","doi":"10.46813/2023-147-026","DOIUrl":"https://doi.org/10.46813/2023-147-026","url":null,"abstract":"Aluminium alloys of the Al-Si and Al-Mg-Sc systems, which are promising for nuclear power generating facilities, were studied. The AK9 aluminium casting alloy and the 1545 wrought alloy were selected as the study materials. Modification of aluminium alloys with a multicomponent nanodispersed modifier based on Mg2Si and SiC was proposed. Grain grinding of modifying alloys by 1.5–2 times, strength properties increasing by 12…18% and corrosion resistance improving were achieved. The mechanism of action of the multicomponent nanodispersed modifier in an aluminium melt was proposed. The use of such modifiers facilitates the technological process, is environmentally safe, and leads to a uniform distribution of the introduced nanocompositions, which increases the strength and stability of alloys. The results achieved showed the effectiveness of modification aluminium alloys with nanodispersed compositions.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136013767","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
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