A MODEL STUDY ON MULTISTEP RECOVERY OF ACTINIDES BASED ON THE DIFFERENCE IN DIFFUSION COEFFICIENTS WITHIN LIQUID METAL

다국어 초록 (Multilingual Abstract)

This study presents an effective method for additional recovery of residual actinides inliquid electrodes after the electrowinning process of pyroprocessing. The major distinctivefeature of this method is a reactor with multiple reaction cells separated by partition wallsin order to improve the recovery yield, thereby using the interelement difference indiffusion coefficients within the liquid electrode and controlling the selectivity and purityof element recovery. Through an example of numerical simulation of the diffusion scenariosof individual elements, we verified that the proposed method could effectivelyseparate the actinides (U and Pu) and rare-earth elements contained in liquid cadmium.
We performed a five-step consecutive recovery process using a simplified conceptualreaction cell and recovered 58% of the initial amount of actinides (U þ Pu) in high purity( 99%).

참고문헌 (Reference)

1 최은영, "파이로프로세싱을 위한 전해환원 공정기술 개발" 한국화학공학회 52 (52): 279-288, 2014

2 KEE-CHAN SONG, "Status of Pyroprocessing Technology Development in Korea" 한국원자력학회 42 (42): 131-144, 2010

3 T. Kato, "Separation behaviors of actinides from rare-earths in molten salt electrorefining using saturated liquid cadmium cathode" 357 : 105-114, 2006

4 HANSOO LEE, "PYROPROCESSING TECHNOLOGY DEVELOPMENT AT KAERI" 한국원자력학회 43 (43): 317-328, 2011

5 F. Lantelme, "Molten Salts Chemistry" Elsevier 551-, 2013

6 T. Murakami, "Electrochemical measurement of diffusion coefficient of actinides and rare earths in liquid Cd" 7 : 798-803, 2012

7 K. Uozumi, "Electrochemical behaviors of uranium and plutonium at simultaneous recoveries into liquid cadmium cathodes" 325 : 34-43, 2004