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JAEA Reports

Decommissioning activities and R&D of nuclear facilities in the second midterm plan

Terunuma, Akihiro; Mimura, Ryuji; Nagashima, Hisao; Aoyagi, Yoshitaka; Hirokawa, Katsunori*; Uta, Masato; Ishimori, Yuu; Kuwabara, Jun; Okamoto, Hisato; Kimura, Yasuhisa; et al.

JAEA-Review 2016-008, 98 Pages, 2016/07

JAEA-Review-2016-008.pdf:11.73MB

Japan Atomic Energy Agency formulated the plan to achieve the medium-term target in the period of April 2010 to March 2015(hereinafter referred to as "the second medium-term plan"). JAEA determined the plan for the business operations of each year (hereinafter referred to as "the year plan"). This report is that the Sector of Decommissioning and Radioactive Waste Management has summarized the results of the decommissioning technology development and decommissioning of nuclear facilities which were carried out in the second medium-term plan.

Journal Articles

Fabrication of a column electrode; Selection of electrode materials and pretreatment of the carbon fiber working electrode

Kitatsuji, Yoshihiro; Aoyagi, Hisao*

Review of Polarography, 52(1), p.51 - 53, 2006/05

no abstracts in English

Journal Articles

Rapid and quantitative electrolytic preparation and speciation of neptunium ions of various oxidation states using multi-step column electrodes

Aoyagi, Hisao*; Kitatsuji, Yoshihiro; Yoshida, Zenko; Kihara, Sorin*

Analytica Chimica Acta, 538(1-2), p.283 - 289, 2005/05

 Times Cited Count:14 Percentile:41.48(Chemistry, Analytical)

Redox behavior of Np(III), (IV), (V) and (VI) ions in aqueous perchloric, nitric and sulphuric acid solutions was elucidated by using column electrodes connected in series in a flow system. Using a glassy carbon fiber working electrode as the column electrode was found to be very useful for the investigation of current-potential relations of not only reversible redox processes such as Np(VI)/(V) or Np(IV)/(III) but also irreversible processes such as Np(V)/(IV) or Np(V)/(III), the latter not observed by conventional voltammetry which uses a glassy carbon or platinum electrode. Quantitative electrolysis could be executed even if the redox process was completely irreversible by the use of the column electrodes. By taking advantage of column electrode electrolysis, a novel method was developed for the rapid preparation of a neptunium species of a desired oxidation state, including unstable species. The multi-step column electrode system was demonstrated to be useful for the coulometric determination and speciation of Np(IV), (V) and (VI) in aqueous HNO$$_{3}$$ solution as an example.

Journal Articles

Plutonium(VI) accumulation and reduction by lichen biomass; Correlation with U(VI)

Onuki, Toshihiko; Aoyagi, Hisao*; Kitatsuji, Yoshihiro; Samadfam, M.; Kimura, Yasuhiko; Purvis, O. W.*

Journal of Environmental Radioactivity, 77(3), p.339 - 353, 2004/08

 Times Cited Count:12 Percentile:28.71(Environmental Sciences)

no abstracts in English

Journal Articles

New method for the separation of actinide ions by controlled-potential electrolysis at the interface between aqueous and organic solutions

Kitatsuji, Yoshihiro; Aoyagi, Hisao; Kimura, Takaumi; Yoshida, Zenko; Kudo, Hiroshi*; Kihara, Sorin*

Journal of Nuclear Science and Technology, 39(Suppl.3), p.259 - 262, 2002/11

Controlled-potential electrolysis (CPE) method for the transfer of an ion at the interface of two immiscible electrolyte solutions has been developed. The CPE method was applied to the transfer of actinide ions such as UO$$_{2}$$$$^{2+}$$ and Am$$^{3+}$$ between aqueous (W) and nitrobenzene (NB) solutions. The transfer of actinide ions from W to NB facilitated by bis(diphenyl-phosphoryl)methane (BDPPM) was studied, and it was found that CPE was successfully applied to the electrolytic separation of U(VI) and Am(III) from W to NB containing BDPPM.

Journal Articles

Role of lichen biomass on chemical speciation of Pu and U in ferrestrial environment

Onuki, Toshihiko; Samadfam, M.; Kimura, Yasuhiko; Kitatsuji, Yoshihiro; Aoyagi, Hisao; Purvis, O. W.*

Proceedings of the International Workshop on Distribution and Speciation of Radionuclides in the Environment, p.174 - 180, 2000/00

no abstracts in English

Journal Articles

A Critical evaluation of the redox properties of uranium, neptunium and plutonium ions in acidic aqueous solutions

Kihara, Sorin*; Yoshida, Zenko; Aoyagi, Hisao; Maeda, Koji*; Shirai, Osamu; Kitatsuji, Yoshihiro; Yoshida, Yumi*

Pure and Applied Chemistry, 71(9), p.1771 - 1807, 1999/09

 Times Cited Count:45 Percentile:80.7(Chemistry, Multidisciplinary)

no abstracts in English

Journal Articles

Plutonium(III)-ion selective electrode of liquid membrane type using multidentate phosphine oxide ionophore

Kitatsuji, Yoshihiro; Aoyagi, Hisao; Yoshida, Zenko; Kihara, Sorin*

Analytica Chimica Acta, 387, p.181 - 187, 1999/00

 Times Cited Count:11 Percentile:40.75(Chemistry, Analytical)

no abstracts in English

Journal Articles

Voltammetric study on ion transfer of uranium(VI) ion between aqueous and nitrobenzene phases in the presence of bis(diphenylphosphoryl) methane

Kitatsuji, Yoshihiro; Aoyagi, Hisao; Yoshida, Zenko; Kihara, Sorin*

Analytical Sciences, 14, p.67 - 70, 1998/02

 Times Cited Count:11 Percentile:39.71(Chemistry, Analytical)

no abstracts in English

Journal Articles

Kinetics of reduction of uranium(VI) to uranium(IV) at titanium electrode in nitric acid and hydrazine media

K-W.Kim*; J-D.Kim*; Aoyagi, Hisao; Yoshida, Zenko

Journal of Nuclear Science and Technology, 31(4), p.329 - 334, 1994/04

 Times Cited Count:8 Percentile:61.28(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Voltammetric study on the transfer of U, Np and Pu ions at the aqueous-organic interface facilitated by phosphine oxides

Yoshida, Zenko; Aoyagi, Hisao; Meguro, Yoshihiro; Kitatsuji, Yoshihiro; Kihara, Sorin*

Journal of Alloys and Compounds, 213-214, p.324 - 327, 1994/00

 Times Cited Count:8 Percentile:58.71(Chemistry, Physical)

no abstracts in English

Journal Articles

Spent fuel reprocessing based on electrochemical extraction process(SREEP)

Yoshida, Zenko; Aoyagi, Hisao; ; Takeishi, Hideyo; Sasaki, Yuji; Uno, Seiichiro; Tachikawa, Enzo

Journal of Alloys and Compounds, 213-214, p.453 - 455, 1994/00

 Times Cited Count:7 Percentile:55.74(Chemistry, Physical)

no abstracts in English

Journal Articles

Pretreatment of a titanium electrode for reduction of Uranium(VI) in nitric acid-hydrazine media

K.-W.Kim*; J.-D.Kim*; Aoyagi, Hisao; ; Yoshida, Zenko

Journal of Nuclear Science and Technology, 30(6), p.554 - 559, 1993/06

 Times Cited Count:4 Percentile:45.58(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Glassy carbon fiber column electrode for multi-step flow-coulometry

Aoyagi, Hisao

Bunseki, 1993(6), 452 Pages, 1993/00

no abstracts in English

Journal Articles

Determination of concentration and distribution of (CuO)$$^{+}$$ in high-T$$_{c}$$ superconducting La$$_{2-x}$$Sr$$_{x}$$CuO$$_{y}$$ pellet by flow-coulometry

Sasaki, Yuji; Aoyagi, Hisao; Takeishi, Hideyo; Yoshida, Zenko

Physica C, 191, p.347 - 353, 1992/00

 Times Cited Count:7 Percentile:55.21

no abstracts in English

Journal Articles

Chemical analysis of oxidation state of copper or oxygen and its distribution in superconducting La-Sr-Cu oxide

Sasaki, Yuji; Aoyagi, Hisao; Takeishi, Hideyo; Yoshida, Zenko

Analytical Sciences, 7(Suppl.), p.1201 - 1204, 1991/00

no abstracts in English

Journal Articles

Electrode processes of plutonium ions in phosphate media

Yoshida, Zenko; Aoyagi, Hisao; *

Z. Anal. Chem., 340, p.403 - 409, 1991/00

no abstracts in English

JAEA Reports

Determination of plutonium in nitric acid solution by spectrophotometry of Pu(VI), II

; Aoyagi, Hisao; Yoshida, Zenko

JAERI-M 87-084, 10 Pages, 1987/06

JAERI-M-87-084.pdf:0.46MB

no abstracts in English

18 (Records 1-18 displayed on this page)
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