{"title":"Preparation of Tc-NpO2 metal-ceramic compositions and their imitators (Re, Th, Nd) for long-term safe storage of long-life fission products","authors":"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","doi":"10.1016/j.jnucmat.2023.154711","DOIUrl":null,"url":null,"abstract":"<div><p>The preparation routes for ceramic-metal matrices (CMM) Tc-NpO<sub>2</sub> and their imitators Tc(Re)-ThO<sub>2</sub> and Tc(Re)-Nd<sub>2</sub>O<sub>3</sub> 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(H<sub>2</sub>O)<sub>3</sub>(TcO<sub>4</sub>)<sub>4</sub>]×H<sub>2</sub>O 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-NpO<sub>2</sub> and the leaching rate of each radionuclide was experimentally determined.</p></div>","PeriodicalId":373,"journal":{"name":"Journal of Nuclear Materials","volume":"587 ","pages":"Article 154711"},"PeriodicalIF":2.8000,"publicationDate":"2023-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nuclear Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022311523004798","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
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.
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.
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