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Journal Articles

Improvement in flow-sheet of extraction chromatography for trivalent minor actinides recovery

Watanabe, So; Senzaki, Tatsuya; Shibata, Atsuhiro; Nomura, Kazunori; Takeuchi, Masayuki; Nakatani, Kiyoharu*; Matsuura, Haruaki*; Horiuchi, Yusuke*; Arai, Tsuyoshi*

Journal of Radioanalytical and Nuclear Chemistry, 322(3), p.1273 - 1277, 2019/12

 Times Cited Count:0

Journal Articles

Characteristics of TPDN/SiO$$_{2}$$-P adsorbent for MA(III) recovery

Kofuji, Hirohide; Watanabe, So; Takeuchi, Masayuki; Suzuki, Hideya; Matsumura, Tatsuro; Shiwaku, Hideaki; Yaita, Tsuyoshi

Progress in Nuclear Science and Technology (Internet), 5, p.61 - 65, 2018/11

Journal Articles

Microscopic analyses of complexes formed in adsorbent for Mo and Zr separation chromatography

Abe, Ryoji*; Nagoshi, Kohei*; Arai, Tsuyoshi*; Watanabe, So; Sano, Yuichi; Matsuura, Haruaki*; Takagi, Hideaki*; Shimizu, Nobutaka*; Koka, Masashi*; Sato, Takahiro*

Nuclear Instruments and Methods in Physics Research B, 404, p.173 - 178, 2017/08

 Times Cited Count:0 Percentile:100(Instruments & Instrumentation)

Journal Articles

Flow-sheet study of MA recovery by extraction chromatography for SmART cycle project

Watanabe, So; Nomura, Kazunori; Kitawaki, Shinichi; Shibata, Atsuhiro; Kofuji, Hirohide; Sano, Yuichi; Takeuchi, Masayuki

Procedia Chemistry, 21, p.101 - 108, 2016/12

BB2015-3215.pdf:0.34MB

 Times Cited Count:5 Percentile:2.57

Journal Articles

Particle induced X-ray emission-computed tomography analysis of an adsorbent for extraction chromatography

Sato, Takahiro; Yokoyama, Akihito; Kitamura, Akane; Okubo, Takeru; Ishii, Yasuyuki; Takahatake, Yoko; Watanabe, So; Koma, Yoshikazu; Kada, Wataru*

Nuclear Instruments and Methods in Physics Research B, 371, p.419 - 423, 2016/03

 Times Cited Count:3 Percentile:48.98(Instruments & Instrumentation)

Journal Articles

Flow injection extraction chromatography with ICP-MS for thorium and uranium determination in human body fluids

Tolmachyov, S.; Kuwabara, Jun*; Noguchi, Hiroshi

Journal of Radioanalytical and Nuclear Chemistry, 261(1), p.125 - 131, 2004/07

 Times Cited Count:18 Percentile:21.61(Chemistry, Analytical)

A method based on flow injection extraction chromatography coupled with on-line ICP-MS (FI-EC-ICPMS) for simultaneous thorium and uranium determination in human body fluids (urine and blood) has been developed and validated. By using extraction chromatography, the limits of detection for $$^{232}$$Th, $$^{235}$$U and $$^{238}$$U were achieved 0.06 ng l$$^{-1}$$, 0.0014 ng l$$^{-1}$$ and 0.05 ng l$$^{-1}$$, respectively. The FI-EC-ICPMS method accuracy was 102.4% and 101.5% with overall precision (RSDmax at 95% CI) of 5.3% and 4.9% for $$^{232}$$Th and $$^{238}$$U, respectively. The $$^{235}$$U/$$^{238}$$U atom ratio is measured with 1.8% precision. The technique was employed for simultaneous thorium and uranium analyses in human urine and blood samples after microwave digestion.

Journal Articles

Elemental groups separation for high-level waste partitioning using a novel silica-based CMPO extraction-resin

Hoshi, Harutaka*; Wei, Y.*; Kumagai, Mikio*; Asakura, Toshihide; Uchiyama, Gunzo*

Journal of Nuclear Science and Technology, 39(Suppl.3), p.874 - 877, 2002/11

To facilitate the management of high-level liquid waste (HLLW) and minimize its long-term radiological risk in geologic disposal, we have proposed an advanced partitioning process by extraction chromatography using a minimal organic solvent and compact equipment to separate long-lived minor actinides (MA) and specific fission products (FP) such as Zr and Mo from nitrate acidic HLLW solution. Novel silica-based extraction-resin for elemental groups separation was prepared by impregnating CMPO (octyl(phenyl)-N, N-diisobutylcarbamoylmethylphosphine oxide) into a macro-reticular styrene-divinylbenzene copolymer immobilized in porous silica particles with a diameter of 50 $$mu$$m (SiO$$_{2}$$-P). Separation experiments for simulated HLLW solutions containing a trace amount of $$^{243}$$Am (III) and macro amounts of typical FP elements were carried out by column chromatography. It was found that the elements in the simulated HLLW were successfully separated to the following three groups: Cs-Sr-Rh-Ru, Pd-Ln-Am and Zr-Mo.

Journal Articles

Application of centrifugal partition chromatography to separation of actinides and lanthanides in TBP extraction system

Usuda, Shigekazu; Abe, Hitoshi; Tachimori, Shoichi; Takeishi, Hideyo; *

Solvent Extraction 1990, p.717 - 722, 1992/00

no abstracts in English

Journal Articles

Extraction-chromatographic separation of uranium from long-lived fission products using tributyl phosphate

;

J.Radioanal.Chem., 20(2), p.455 - 462, 1974/02

no abstracts in English

Oral presentation

Irradiation degradation of adsorbents for minor actinides recovery

Watanabe, So; Sano, Yuichi; Kofuji, Hirohide; Takeuchi, Masayuki; Koizumi, Tsutomu

no journal, , 

Oral presentation

Vitrification properties of MA adsorbents

Kofuji, Hirohide; Watanabe, So; Goto, Ichiro; Oriuchi, Akio; Takeuchi, Masayuki; Kobayashi, Hidekazu; Sasage, Kenichi

no journal, , 

Vitrification procedure for the extraction chromatography using porous silica covered with extractant were examined. In this method, it was expected that minor actinide (MA) were separated from high level radioactive liquid waste using extractant CMPO and/or HDEHP. In this study, vitrified adsorbent with simulated high level liquid waste were prepared and evaluated from some viewpoints of high level waste form properties. As the results, selected adsorbent were generally well vitrified and had enough chemical durability.

Oral presentation

Application of micro PIXE analysis to assessment of adsorbents for extraction chromatography

Takeuchi, Masayuki; Watanabe, So; Takahatake, Yoko; Sato, Takahiro; Arai, Tsuyoshi*

no journal, , 

no abstracts in English

Oral presentation

Thermal degradation and vitrification properties of MA adsorbents

Kofuji, Hirohide; Watanabe, So; Goto, Ichiro; Oriuchi, Akio; Takeuchi, Masayuki; Kobayashi, Hidekazu; Sasage, Kenichi

no journal, , 

Vitrification procedure for extraction chromatography using porous silica particles covered with extractant was investigated. In this method, minor actinides (MAs) were separated from high-level radioactive liquid waste by extractant CMPO and/or HDEHP. In this study, thermal degradation behavior and vitrification properties were evaluated from the viewpoints of high-level wasteform properties using porous silica adsorbent impregnated with extractant CMPO and HDEHP. As the results of various experiments, suitable vitrification procedure for MA/RE adsorbents was clarified and selected adsorbent was generally well-vitrified and had enough chemical durability.

Oral presentation

Improvement in flow-sheet of extraction chromatography for trivalent minor actinides recovery

Watanabe, So; Senzaki, Tatsuya; Shibata, Atsuhiro; Nomura, Kazunori; Takeuchi, Masayuki; Nakatani, Kiyoharu*; Matsuura, Haruaki*; Horiuchi, Yusuke*; Arai, Tsuyoshi*

no journal, , 

no abstracts in English

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