Fabrication and physical properties of lanthanide oxide glass wasteform for the immobilization of lanthanide oxide wastes generated from pyrochemical process

Title
Fabrication and physical properties of lanthanide oxide glass wasteform for the immobilization of lanthanide oxide wastes generated from pyrochemical process
Author
김송현
Keywords
Pyrochemical process; LiCl?KCl eutectic waste salt; Lanthanide oxide fission product; Glass wasteform; Vitrification
Issue Date
2014-03
Publisher
ELSEVIER SEQUOIA SA
Citation
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, Vol.299 No.3 [2014], pp. 1731-1738
Abstract
The pyrochemical process, which uses a dry method to recycle used nuclear fuel generates waste LiCl?KCl salt containing radioactive lanthanide elements. To reuse LiCl?KCl salt, the lanthanide elements are separated through a precipitation method promoted by oxygen sparging and the separated fission product of lanthanide oxide should be fabricated into durable wasteforms sustainable for several 1,000 years to store in a final geological repository. Herein, we report the fabrication of a borosilicate glass based wasteform with a glass matrix of SiO2?Al2O3?B2O3 having a high waste loading of 50 wt% lanthanide oxide. Th physical properties of four kinds of wasteforms having a different lanthanide oxide waste composition were evaluated. To investigate the long-term physical stability of each sample having 50 wt% lanthanide oxide waste loading, time?temperature?transformation (TTT) test was conducted at 500 and 700 °C for 60 and 180 h, and the physical properties were evaluated after each TTT test.
URI
http://link.springer.com/article/10.1007%2Fs10967-013-2863-6http://hdl.handle.net/20.500.11754/49487
ISSN
0236-5731
DOI
10.1007/s10967-013-2863-6
Appears in Collections:
RESEARCH INSTITUTE[S](부설연구소) > INNOVATIVE TECHNOLOGY CENTER FOR RADIATION SAFETY(방사선안전신기술연구소) > Articles
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