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Hoshi, Harutaka*; Zhang, A.*; Uchida, Hiromi*; Kuraoka, Etsushu*
JNC TJ8400 2005-011, 20 Pages, 2005/02
JNC-TJ8400-2005-011.pdf:0.86MB
In order to apply CalixR14 extractant to extraction chromatography for Cs separation, basic characteristics of CalixR14 adsorbent were studied. CalixR14 impregnated resin and CalixR14 + TBP impregnated resin were prepared. CalixR14 extractant showed no adsorption for Cs by liquid-liquid extraction and CalixR14 impregnated resin also showed no adsorption for Cs. Therefore, it is concluded that CalixR14 itself has no affinity for Cs. On the other hand, Cs was adsorbed onto CalixR14-TBP impregnated resin from a concentrated nitric acid solution. The distribution coefficients of Cs were more than 10 cm
/g from 2 to 6 M nitric acid. While Rb showed week adsorption, Na, K, Sr and La showed no adsorption and separation factor was over 199. A slight amount of CalixR14 and TBP was leaked from impregnated resin into the aqueous phase. Separation from simulated liquid waste was carried out by using a column packed with CalixR14-TBP adsorbent. Na, K, Sr and La were not adsorbed onto the column, however, Cs and Rb were adsorbed onto the column. Cs and Rb were eluted from the column by water. Cs and Rb were quantitatively recovered.
Hoshi, Harutaka*; Zhang, A.*; Kuraoka, Etsushu*; Yamaguchi, Hiromi*
JNC TJ8420 2004-001, 23 Pages, 2004/02
JNC-TJ8420-2004-001.pdf:1.01MB
The separation behavior of rare earth in simulated high-level liquid waste was examined by using a cation exchanger, which is synthesized by embedding a macroreticular resin containing sulfonic acid group as exchanger site in porous silica particles.
Hoshi, Harutaka*; Zhang, A.*; Kuraoka, Etsushu*; Yamaguchi, Hiromi*
JNC TJ8410 2004-001, 26 Pages, 2004/02
JNC-TJ8410-2004-001.pdf:1.16MB
In order to apply the extraction chromatography for trivalent actinides (Am and Cm) recovery process from high level liquid waste, the basic characteristics of TODGA adsorbent were experimentally studied.
Hoshi, Harutaka*; Zhang, A.*; Kuraoka, Etsushu*
JNC TJ8410 2004-008, 27 Pages, 2003/12
JNC-TJ8410-2004-008.pdf:0.68MB
In order to investigate the possibility to realize an engineering system of extraction chromatographyusing CMPO adsorbent, experiments on CMPO leak and process flowsheet were carried out.
Kuraoka, Etsushu*; Zhang, A.*
JNC TJ8400 2003-073, 26 Pages, 2003/03
JNC-TJ8400-2003-073.pdf:0.95MB
In order to study the applicability of extraction chromatographic technology to the separation of Sr from high level liquid waste, a novel silica-supported Sr-adsorbent was prepared. Adsorption and separation experiments for Sr and other FP elements in nitric acid solution were carried out.
Kuraoka, Etsushu*; Arai, Tsuyoshi*; Zhang, A.*
JNC TJ8420 2003-003, 25 Pages, 2003/02
JNC-TJ8420-2003-003.pdf:1.19MB
In order to study the applicability of the separation of Am, Cm and rare earths from each other by cation exchange technology, a novel silica-based cation exchanger (SiSCR) with sulfonic acid group as exchange site has been synthesized. Its thermo-decomposition property and the performance of adsorption, elution and separation for some rare earths were investigated.
Kuraoka, Etsushu*; Zhang, A.*; Arai, Tsuyoshi*
JNC TJ8400 2003-078, 43 Pages, 2002/12
JNC-TJ8400-2003-078.pdf:1.86MB
In order to study the applicability of extraction chromatography for minor actinides separation in the program of the Feasibility Study on Commercialized Fast Reactor Fuel Cycle Systems, basic characteristics of a novel silica-supported CMPO adsorbent was investigated.
Kuraoka, Etsushu*; *; Kumagai, Mikio*; *
JNC TJ8400 2002-005, 58 Pages, 2002/07
JNC-TJ8400-2002-005.pdf:2.94MB
In order to study the possibility of a pilot-plant-scale test for MA recovery process by extraction chromatography which has been evaluated to have the potentials of small construction area and low cost, this work investigated the process flow sheet, the configuration and installation layout of equipment. Furthermore, the treatment methods for the organic wastes such as CMPO adsorbent were examined. The proposed process consists of two separation columns packed with CMPO adsorbent, where the 1st one is for the recovery of MA, heavy RE, Zr and Mo from the HLLW and the 2nd one for the removal of the Zr and Mo from the effluent of the 1st column, recovering the MA and the heavy RE as a nitrate acidic solution. The results of the separation experiments using simulated HLLW solutions indicate that the expected separation performance for the main elements was achieved and the proposed process is principally applicable. In addition, the process has the advantages such as "salt-free", the possible recovery of Zr-Mo and Pd from HLLW. The process flow diagram for the proposed separation process was drawn and the mass balance for one test of pilot-plant-scale was evaluated. The structure and size of the main equipment including the separation columns were conceptually designed and the installation layout of the equipment was drawn. The cost of the equipment was preliminary estimated based the specification of the equipment. In addition, the effective treatment methods for the organic wastes including depleted CMPO adsorbent, DTPA or oxalic acid containing waste solution were examined based on article survey. Moreover, some exploratory experiments for the decomposition treatment of these wastes were conducted by using the Fenton reagents. Finally, the subjects remained in this process were extracted.
Kuraoka, Etsushu*; Arai, Tsuyoshi*
JNC TJ8420 2002-003, 35 Pages, 2002/03
JNC-TJ8420-2002-003.pdf:0.59MB
no abstracts in English
Kuraoka, Etsushu*; Arai, Tsuyoshi*; Hoshi, Harutaka*
JNC TJ8420 2002-002, 35 Pages, 2002/02
JNC-TJ8420-2002-002.pdf:0.99MB
no abstracts in English
Kuraoka, Etsushu*; Hoshi, Harutaka
no journal, ,
We have developed a separation process of extraction chromatography for recovery of minor actinides (MA = Am, Cm) from spent fuel by using porous silica adsorbent impregnated with chelate reagent. In this work, a hot test by using process solution from spent fuel through nBu-BTP(2,6-bis-(5,6-dibutyl-1,2,4-triazine-3-yl)pyridine)column was examined. A study on process simplification of MA recovery process by using a novel R-BTP adsorbent was also carried out.