scholarly journals PYROCHEMICAL SEPARATION OF CERIUM-RARE EARTH FISSION PRODUCTS

1963 ◽  
Author(s):  
J T Knight
Keyword(s):  
Rare Earth ◽  
Fission Products

Yields of rare earth fission products in the spontaneous fission of californium-252

1985 ◽  
Vol 91 (2) ◽  
pp. 291-296
Author(s):  
B. S. Tomar ◽  
H. Naik ◽  
A. Ramaswamy ◽  
Satya Prakash
Keyword(s):  
Rare Earth ◽  
Spontaneous Fission ◽  
Fission Products

Removal of Fission Products in the Spent Electrolyte Using Iron Phosphate Glass as a Sorbent

2010 ◽  
Author(s):  
Ippei Amamoto ◽  
Naoki Mitamura ◽  
Tatsuya Tsuzuki ◽  
Yasushi Takasaki ◽  
Atsushi Shibayama ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Phosphate Glass ◽  
Alkali Metals ◽  
Fission Products ◽  
Iron Phosphate ◽  
Experimental Result ◽  
Filtration Method ◽  
High Level ◽  
Filtration Experiment

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 to reduce the volume of the high-level radioactive waste (HLW), the phosphate conversion method is applied for removal of fission products (FP) from the melt, referring to the spent electrolyte in this paper. Among the removing target chlorides in the spent electrolyte i.e., alkali metals, alkaline earth metals and rare earth elements, only the rare earth elements and lithium form the precipitates as insoluble phosphates by reaction with Li3PO4. The sand filtration method was applied to separate FP precipitates from the spent electrolyte. The iron phosphate glass (IPG) powder, which is a compatible material for the immobilization of FP, was used as a filter medium. After filtration experiment, it was proven that insoluble FP could almost be completely removed from the spent electrolyte. Subsequently, we attempted to separate the dissolved FP from the spent electrolyte. The IPG was being used once again but this time as a sorbent instead. This is possible because the IPG has some unique characteristics, e.g., changing the valence of iron, which is one of its network modifiers due to its manufacturing temperature. Therefore, it would be likely to sorb some FP when the chemical condition of IPG is unstable. We produced three kinds of IPG under different manufacturing temperature and confirmed that those glasses could sorb FP as anticipated. According to the experimental result, its sorption efficiency of metal cations was attained at around 20–40%.

Synthesis of rare earth phosphates in molten LiCl–KCl eutectic: Application to preliminary treatment of chlorinated waste streams containing fission products

2008 ◽  
Vol 381 (3) ◽  
pp. 284-289 ◽  
Author(s):  
Damien Hudry ◽  
Isabelle Bardez ◽  
Aydar Rakhmatullin ◽  
Catherine Bessada ◽  
Florence Bart ◽  
...  
Keyword(s):  
Rare Earth ◽  
Fission Products ◽  
Preliminary Treatment ◽  
Waste Streams

The yield of U235 fission products in the rare-earth region

Atomic Energy ◽  
1957 ◽  
Vol 3 (7) ◽  
pp. 729-733
Author(s):  
V. K. Gorshkov ◽  
R. N. Ivanov ◽  
G. M. Kukavadze ◽  
I. A. Reformatsky
Keyword(s):  
Rare Earth ◽  
Fission Products ◽  
U235 Fission ◽  
The Rare Earth

The rapid separation of rare-earth fission products by cation exchange, using lactic-acid eluant

1955 ◽  
Vol 1 (1-2) ◽  
pp. 163-164 ◽  
Author(s):  
J.G. Cuninghame ◽  
M.L. Sizeland ◽  
H.H. Willis ◽  
J. Eakins ◽  
E.R. Mercer
Keyword(s):  
Lactic Acid ◽  
Rare Earth ◽  
Cation Exchange ◽  
Fission Products ◽  
Rapid Separation

Advanced system for separation of rare-earth fission products

1982 ◽  
Vol 74 (1-2) ◽  
pp. 117-124 ◽  
Author(s):  
J. D. Baker ◽  
R. J. Gehrke ◽  
R. C. Greenwood ◽  
D. H. Meikrantz
Keyword(s):  
Rare Earth ◽  
Fission Products ◽  
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