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ISSN : 1738-1894(Print)
ISSN : 2288-5471(Online)
ISSN : 2288-5471(Online)
방사성 희토류 침전물내 잔류하는 LiCl-KCl 공융염의 회수
Recovery of Residual LiCl-KCl Eutectic Salts in Radioactive Rare Earth Precipitates
Abstract
For the pyrochemical process of spent nuclear fuels, recovery of LiCl-KCl eutectic salts is needed to reduce radioactive waste volume and to recycle resource materials. This paper is about recovery of residual LiCl-KCl eutectic salts in radioactive rare earth precipitates (rare earth oxychlorides or oxides) by using a vacuum distillation process. In the vacuum distillation test apparatus, the salts in the rare earth precipitates were vaporized and were separated effectively. The separated salts were deposited in three positions of the vacuum distillation test apparatus or were collected in the filter and it is difficult to recover them. To resolve the problem, a vacuum distillation and condensation system, which is subjected to the force of a temperature gradient at a reduced pressure, was developed. In a preliminary test of the vacuum distillation/condensation recovery system, it was confirmed that it was possible to condense the vaporized salts only in the salt collector and to recover the condensed salts from the salt collector easily.
LiCl-KCl 공융염, 희토류 침전물, 진공증류, 온도구배, 감압, LiCl-KCl eutectic salt, Rare earth precipitates, Vacuum distillation, Temperature gradient, Reduced pressure
Reference
JNFCWT
Online Submission
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Waste Society (KRS)
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