Document Type
Article
Abstract
Molten salt reactors (MSRs) are promising technology to replace traditional light and heavy water reactors in the near future. Waste management for MSRs, however, remains a pressing concern that needs to be resolved prior to realizing deployment of MSRs. Specifically, the generated salt waste needs to be safely sequestered, a task made difficult by the high solubility of the salt waste that can cause the release of radionuclides into the environment. This work demonstrates a new approach to immobilize multiple fluoride salts into a single waste form by converting highly-soluble fluorides to durable and stable oxyfluorides. Notably, we report a method of conversion of CsF, a very problematic salt, into a pyrochlore structure CsNb2O5F. Multiphase assemblages of oxyfluoride phases are prepared in a single step synthesis. Subsequent leach testing of the as prepared oxyfluorides indicate release rates orders of magnitude lower than standard reference glasses.
Digital Object Identifier (DOI)
Publication Info
Published in MRS Advances, Volume 10, 2025, pages 1840-1845.
Rights
© The Author(s) 2025 This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
APA Citation
Maksimova, A. A., Amoroso, J. W., Page, M., Morrison, G., & zur Loye, H.-C. (2025). Durable oxyfluoride waste forms for salt wastes from molten salt reactors. MRS Advances, 10(15), 1840–1845.https://doi.org/10.1557/s43580-025-01299-4