Plasma Utilization and Immobilization of Waste Reprocessing for Spent Nuclear Fuel

Plasma Utilization and Immobilization of Waste Reprocessing for Spent Nuclear Fuel

Dettagli Bibliografici
Parent link:Bulletin of the Russian Academy of Sciences: Physics=Известия Российской академии наук. Серия физическая.— .— New York: Allerton Press, Inc.
Vol. 89, Suppl. 2.— 2025.— P. S332–S340
Autore principale: Karengin A. G. Aleksandr Grigorievich
Altri autori: Goneym (Gkhoneym) Yo. S. M. Kh. Youmna Sami Makhmud Khalil, Novoselov I. Yu. Ivan Yurievich
Riassunto:Title screen
The safe treatment and reliable immobilization of waste generated during the reprocessing of spent nuclear fuel remain critical challenges for nuclear power. This study evaluates the feasibility of a plasma-based route that converts liquid reprocessing residues into chemically stable metal-oxide powders and then immobilizes these products into durable matrices suitable for long-term storage. The approach combines thermodynamic modeling with laboratory-scale experiments. Modeling was used to determine adiabatic combustion temperatures and equilibrium phase compositions for water–salt–organic feeds under plasma exposure. Experiments with a high-frequency plasma generator confirmed that, under optimized conditions near 1200°C, organic constituents are completely oxidized, and finely dispersed oxides are formed. The resulting powders include simple and complex oxides of iron, molybdenum, zirconium, neodymium, cerium, strontium, and yttrium; the phase balance depends on the plasma-cooling regime. Post-processing by gravitational and magnetic separation improves powder recovery and purity. For final conditioning, the oxides were incorporated into chloride-based melts, yielding dense, chemically and thermally stable solid forms after solidification. These results demonstrate that plasma treatment can integrate waste destruction, oxidation, and immobilization within a single technological workflow, reducing external heat demand and enabling robust products for storage or further use. The findings provide an engineering basis for scaling plasma systems for radioactive-waste management with an emphasis on safety, efficiency, and sustainability
Текстовый файл
AM_Agreement
Pubblicazione: 2025
Soggetti:
plasma treatment
radioactive waste
spent nuclear fuel
immobilization
oxide powders
chloride melts
электронный ресурс
труды учёных ТПУ
Accesso online:https://doi.org/10.1134/S106287382571459X
Natura: Elettronico Capitolo di libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=684364

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