About this Abstract |
Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
Presentation Title |
Perovskite-derived Cs2SnCl6-Silica Composites as Advanced Waste Forms for Chloride Salt Wastes |
Author(s) |
Yang Kun, Brian J Riley, John D Vienna, Dong Zhao, Jie Lian |
On-Site Speaker (Planned) |
Jie Lian |
Abstract Scope |
Advanced materials and processes are required to separate halides and fission products from complex salt waste streams associated with the chemical reprocessing of used nuclear fuels and molten salt reactor technologies and immobilize them into chemically durable waste forms. We explore an innovative concept using metal-halide perovskites (MHPs) as advanced host phases to incorporate Cs and Cl with very high waste loadings. Wet chemistry-synthesized Cs2SnCl6 powders from CsCl salts are encapsulated into a silica matrix to form a composite using spark plasma sintering with tunable Cs and Cl loadings. The MHP-silica composites display exceptional chemical durability with the long-term release rates of Cs and Cl comparable to or outperforming the state-of-the-art waste form materials despite significantly higher waste loadings. The scalable synthesis of the MHPs from wet-chemistry opens up new opportunities in designing advanced salt waste forms for the sustainable development of advanced fuel cycles and next-generation reactor technologies. |
Proceedings Inclusion? |
Undecided |