The evaporation behaviors of rare-earth-doped FLiNaK melts during low-pressure distillation

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• 作者：Zihao Wang ; Haiying Fu ; Yang Yang…
• 关键词：Molten salt ; Low pressure distillation ; Decontamination factor ; Rare earth fluoride
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：311
• 期：1
• 页码：637-642
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Nuclear Chemistry; Physical Chemistry; Nuclear Physics, Heavy Ions, Hadrons; Diagnostic Radiology; Inorganic Chemistry;
• 出版者：Springer Netherlands
• ISSN：1588-2780
• 卷排序：311

文摘

Low pressure distillation of FLiNaK containing rare earth fluorides was carried out to investigate evaporation behaviors of FLiNaK as well as decontamination of rare earth fluorides. Evaporation rate of NdF₃–FLiNaK increased with rising temperature. Decontamination factors (DFs) of six rare earth elements were around 103 and 104 except europium due to the formation of EuF_2. A higher DF of europium up to 1.4 × 103 was obtained upon the addition of oxidant CeF₄. A hundred-gram scale experiment on FLiNaK containing NdF₃ and EuF₃ was performed, with a recovery ratio of 94.2% and the DF of europium to 2.4 × 103 at 900 °C.