Purification of LiCl–KCl eutectic waste salt containing rare earth chlorides delivered from the pyrochemical process of used nuclear fuel using a reactive distillation process
In the pyrochemical process of used nuclear fuel, the purification of waste salts containing radioactive nuclides can greatly contribute to a radioactive waste reduction. For this reason, the purification of LiCl–KCl eutectic salt containing rare earth chlorides was performed using a series of the phosphorylation process and the distillation process. LiCl–KCl eutectic salt recovered from the purification had a very low concentration (<1 ppm) for the rare earth chlorides. The recycling feasibility of the recovered salt was verified through a uranium electro-deposition test using LiCl–KCl eutectic salt as the electrolyte. Based on these results, one body type of reactive distillation equipment with two top covers was designed.
KeywordsPyrochemical process Purification LiCl–KCl eutectic salt Rare earth chloride One body type of reactive distillation equipment
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIP) (No. 2012M2A8A5025700).
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