Process optimization of a closed-chamber distillation system for the recovery of FLiNaK molten salt

Jun-Xia Geng; Yang Yang; Hai-Ying Fu; Yan Luo; Qiang Dou; Qing-Nuan Li

doi:10.1007/s41365-020-00843-1

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Process optimization of a closed-chamber distillation system for the recovery of FLiNaK molten salt

NUCLEAR ENERGY SCIENCE AND ENGINEERING | Updated：2021-02-22

- Process optimization of a closed-chamber distillation system for the recovery of FLiNaK molten salt
- Process optimization of a closed-chamber distillation system for the recovery of FLiNaK molten salt
- Nuclear Science and Techniques 2021年32卷第1期文章编号：3
- Affiliations：
  
  a.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  b.University of Chinese Academy of Sciences, Beijing 100049, China
- Author bio：
  
  fuhaiying@sinap.ac.cn
  Corresponding author, douqiang@sinap.ac.cn
- Funds：
  
  National Natural Science Foundation of China(21771188);Strategic Priority Research Program of the Chinese Academy of Sciences(XDA02030000);Frontier Science Key Program of the Chinese Academy of Sciences(QYZDY-SSW-JSC016)
- DOI：10.1007/s41365-020-00843-1
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Jun-Xia Geng, Yang Yang, Hai-Ying Fu, 等. Process optimization of a closed-chamber distillation system for the recovery of FLiNaK molten salt[J]. Nuclear Science and Techniques, 2021,32(1):3

Jun-Xia Geng, Yang Yang, Hai-Ying Fu, et al. Process optimization of a closed-chamber distillation system for the recovery of FLiNaK molten salt[J]. Nuclear Science and Techniques, 2021,32(1):3
Jun-Xia Geng, Yang Yang, Hai-Ying Fu, 等. Process optimization of a closed-chamber distillation system for the recovery of FLiNaK molten salt[J]. Nuclear Science and Techniques, 2021,32(1):3 DOI： 10.1007/s41365-020-00843-1.

Jun-Xia Geng, Yang Yang, Hai-Ying Fu, et al. Process optimization of a closed-chamber distillation system for the recovery of FLiNaK molten salt[J]. Nuclear Science and Techniques, 2021,32(1):3 DOI： 10.1007/s41365-020-00843-1.

摘要

Abstract

Low-pressure distillation has been proposed as a suitable technique for the recovery of carrier salt from molten salt reactor spent fuel. A closed-chamber distillation system, in which the pump is stopped and pressure-induced salt distillation is performed, was arranged for fluoride salt treatment. A stair-step optimization process was demonstrated to improve the recovery efficiency by up to 99%. The pressure change curve was feasible for estimating the distillation process, and a method for displaying the pressure value online in order to determine the end-point was also developed. The decontamination factor of Nd in the condensate salt was deduced to be greater than 100 with 1 wt% NdF,3,-FLiNaK distillation. The optimal conditions developed in this study showed a high recovery ratio for the fluoride carrier salt and a high separation efficiency for rare earth products.

关键词

Keywords

Keywords Low-pressure distillationClosed chamberFluoride molten saltRecovery ratio

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