Reactive-crystallization method for purification of LiCl salt waste
| Autor: | Hwan-Seo Park, Ki-Rak Lee, Hyun-Woo Kang, Jung-Hoon Choi |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Materials science Precipitation (chemistry) Health Toxicology and Mutagenesis Metallurgy Public Health Environmental and Occupational Health Salt (chemistry) 010403 inorganic & nuclear chemistry Inconel 625 01 natural sciences Pollution Spent nuclear fuel 0104 chemical sciences Analytical Chemistry Corrosion law.invention Waste treatment Nuclear Energy and Engineering chemistry law Radiology Nuclear Medicine and imaging Molten salt Crystallization Spectroscopy |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 325:485-492 |
| ISSN: | 1588-2780 0236-5731 |
| Popis: | Owing to its capability of high-temperature operation, a salt waste treatment process in a pyrochemical process which uses molten salt as an electrolyte for the recycling of spent nuclear fuel adopted melt-crystallization method to purify a molten salt waste generated during the processes. However, because of its high operating temperature, there is a corrosion problem in the crystallizer made of Inconel 625 alloy, resulting in the contamination of crystallized salt on the crystallization plates. To solve the corrosion problem stemming from the molten salt waste under high operation temperature, a reactive-crystallization method was suggested in this study, in which the corrosion products are precipitated by the addition of lithium carbonate as a precipitation agent. To determine the effectiveness of the process, the concentration of corrosion products were analyzed for each stage of the process with respect to the values obtained using the previous melt-crystallization method. In addition, the nuclide separation efficiencies of group I/II and rare-earth nuclides were investigated using the reactive-crystallization method. Through the study, it is found that the reactive-crystallization method is effective in terms of removal of corrosion products, thus resulting in high nuclide separation efficiency. |
| Databáze: | OpenAIRE |
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