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Korean Journal of Metals and Materials > Volume 55(6); 2017 > Article
Korean Journal of Metals and Materials 2017;55(6): 419-426. doi: https://doi.org/10.3365/KJMM.2017.55.6.419
무기합성매질을 이용한 LiCl-KCl 공융염 내 희토류 핵종(Nd)의 포집 및 고화
김나영, 은희철, 박환서, 안도희
한국원자력연구원 핵주기공정개발부
Capture and Solidification of Rare Earth Nuclide (Nd) in LiCl-KCl Eutectic Salt Using a Synthetic Inorganic Composite
Na-Young Kim, Hee-Chul Eun, Hwan-Seo Park, Do-Hee Ahn
Nuclear Fuel Cycle Process Development Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
Correspondence  Hee-Chul Eun ,Tel: +82-42-868-2712, Email: ehc2004@kaeri.re.kr
Received: 22 August 2016;  Accepted: 1 December 2016.  Published online: 1 June 2017.
In this study, neodymium (Nd) nuclides in LiCl-KCl eutectic salts were captured and solidified using a synthetic inorganic composite (Li2O-SiO2-Al2O3-B2O3), a process that allows the selective capture of Nd and fabrication of a composite with Nd captured from waste, without additional additives or mixing. The Nd nuclides in the LiCl-KCl eutectic salt were mainly captured in the form of LiNdSiO4, and it was confirmed that NdSiO3 can be formed in the composite with captured Nd when the content of Nd in the composite is increased. The capture efficiency was higher than about 98 wt%. It was thought that the salt recovered from the Nd capture test was a renewable form could be reused in the pyroprocessing of used nuclear fuel, because the composite has high chemical durability in a LiCl-KCl eutectic salt at 900 ℃. The composite captured Nd was fabricated into a homogeneous glass form and a stable ceramic form.
Keywords: oxides, chemical synthesis, crystal structure, X-ray diffraction, capture and solidification of neodymium
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