This study is carried out to make the pyroprocessing hold a competitive advantage from the viewpoint of environmental load reduction and economical improvement. As one of the measures is to reduce the volume of the high-level radioactive waste, the phosphate conversion method is applied for removal of fission products from the melt as spent electrolyte in this paper. Though the removing target elements in the medium are alkali metals, alkaline earth metals and lanthanoid elements, only lanthanoid elements and lithium form the insoluble phosphates by reaction with Li3PO4 or K3PO4. Therefore, as the first step, the precipitation experiment was carried out to observe the behaviours of elements which form the insoluble precipitates as double salts other than simple salts. Then the filtration was experimented to remove lanthanoid precipitates in the spent electrolyte using Fe2O3-P2O5 glass system as a filtlation medium which is compatible material with the glassification. The result of separation of lanthanoid precipitates by filtration was effective and attained almost 100%.
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ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management
October 11–15, 2009
Liverpool, UK
Conference Sponsors:
- Nuclear Engineering Division and Environmental Engineering Division
ISBN:
978-0-7918-4407-6
PROCEEDINGS PAPER
Separation of Lanthanoid Phosphates From the Spent Electrolyte of Pyroprocessing
Ippei Amamoto,
Ippei Amamoto
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
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Hirohide Kofuji,
Hirohide Kofuji
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
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Munetaka Myochin,
Munetaka Myochin
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
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Tatsuya Tsuzuki,
Tatsuya Tsuzuki
Central Glass Co., Ltd., Matsuzaka, Mie, Japan
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Yasushi Takasaki,
Yasushi Takasaki
Akita University, Akita, Akita, Japan
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Tetsuji Yano,
Tetsuji Yano
Tokyo Institute of Technology, Tokyo, Japan
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Takayuki Terai
Takayuki Terai
The University of Tokyo, Tokyo, Japan
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Ippei Amamoto
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
Hirohide Kofuji
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
Munetaka Myochin
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
Tatsuya Tsuzuki
Central Glass Co., Ltd., Matsuzaka, Mie, Japan
Yasushi Takasaki
Akita University, Akita, Akita, Japan
Tetsuji Yano
Tokyo Institute of Technology, Tokyo, Japan
Takayuki Terai
The University of Tokyo, Tokyo, Japan
Paper No:
ICEM2009-16265, pp. 705-713; 9 pages
Published Online:
December 12, 2010
Citation
Amamoto, I, Kofuji, H, Myochin, M, Tsuzuki, T, Takasaki, Y, Yano, T, & Terai, T. "Separation of Lanthanoid Phosphates From the Spent Electrolyte of Pyroprocessing." Proceedings of the ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management. ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management, Volume 1. Liverpool, UK. October 11–15, 2009. pp. 705-713. ASME. https://doi.org/10.1115/ICEM2009-16265
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