Preparation of Tc-NpO2 metal-ceramic compositions and their imitators (Re, Th, Nd) for long-term safe storage of long-life fission products

IF 2.8 2区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Nuclear Materials Pub Date : 2023-09-07 DOI:10.1016/j.jnucmat.2023.154711

A.M. Fedoseev , A.A. Bessonov , A.V. Sitanskaia , M.A. Volkov , A.G. Volkova , M.N. Sokolova , D.V. Ryabkov , K.K. Korchenkin , K.E. German

引用次数: 0

Abstract

The preparation routes for ceramic-metal matrices (CMM) Tc-NpO₂ and their imitators Tc(Re)-ThO₂ and Tc(Re)-Nd₂O₃ with different metal-oxide ratios has been investigated and the physical and chemical properties (such as leaching, thermal stability) of the products were determined. The structure of [Np(H₂O)₃(TcO₄)₄]×H₂O has been determined by single crystal X-ray diffraction analysis. Thermal decomposition of neptunium pertechnetates (IV and VI) as well as their imitators neodymium and thorium perrhenates were considered in detail. The surface morphology for CMM Tc-NpO₂ and the leaching rate of each radionuclide was experimentally determined.

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长寿命裂变产物长期安全贮存用Tc-NpO2金属陶瓷组合物及其仿制品(Re, Th, Nd)的制备

研究了陶瓷-金属基体(CMM) Tc- npo2及其仿制品Tc(Re)-ThO2和Tc(Re)-Nd2O3在不同金属氧化物比下的制备路线，并测定了产物的理化性质(如浸出性、热稳定性)。用单晶x射线衍射法测定了[Np(H2O)3(TcO4)4]×H2O的结构。对高透酸镎(IV和VI)及其仿制品高透酸钕和高透酸钍的热分解进行了详细的研究。实验测定了CMM Tc-NpO2的表面形貌和各放射性核素的浸出率。

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来源期刊

Journal of Nuclear Materials 工程技术-材料科学：综合

CiteScore

5.70

自引率

25.80%

发文量

601

审稿时长

63 days

期刊介绍： The Journal of Nuclear Materials publishes high quality papers in materials research for nuclear applications, primarily fission reactors, fusion reactors, and similar environments including radiation areas of charged particle accelerators. Both original research and critical review papers covering experimental, theoretical, and computational aspects of either fundamental or applied nature are welcome. The breadth of the field is such that a wide range of processes and properties in the field of materials science and engineering is of interest to the readership, spanning atom-scale processes, microstructures, thermodynamics, mechanical properties, physical properties, and corrosion, for example. Topics covered by JNM Fission reactor materials, including fuels, cladding, core structures, pressure vessels, coolant interactions with materials, moderator and control components, fission product behavior. Materials aspects of the entire fuel cycle. Materials aspects of the actinides and their compounds. Performance of nuclear waste materials; materials aspects of the immobilization of wastes. Fusion reactor materials, including first walls, blankets, insulators and magnets. Neutron and charged particle radiation effects in materials, including defects, transmutations, microstructures, phase changes and macroscopic properties. Interaction of plasmas, ion beams, electron beams and electromagnetic radiation with materials relevant to nuclear systems.