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Journal Articles

A Design study on a metal fuel fast reactor core for high efficiency minor actinide transmutation by loading silicon carbide composite material

Ohgama, Kazuya; Hara, Toshiharu*; Ota, Hirokazu*; Naganuma, Masayuki; Oki, Shigeo; Iizuka, Masatoshi*

Journal of Nuclear Science and Technology, 59(6), p.735 - 747, 2022/06

Journal Articles

A Design study on a mixed oxide fuel sodium-cooled fast reactor core partially loading highly concentrated MA-containing metal fuel

Ohgama, Kazuya; Ota, Hirokazu*; Oki, Shigeo; Iizuka, Masatoshi*

Proceedings of 2019 International Congress on Advances in Nuclear Power Plants (ICAPP 2019) (Internet), 9 Pages, 2019/05

JAEA Reports

Hydrochemical investigation at the Mizunami Underground Research Laboratory; Compilation of groundwater chemistry data in Mizunami group and Toki granite (fiscal year 2011)

Omori, Kazuaki; Shingu, Shinya; Hagiwara, Hiroki; Masuda, Kaoru*; Iizuka, Masatoshi*; Inui, Michiharu*; Iwatsuki, Teruki

JAEA-Data/Code 2013-001, 330 Pages, 2013/05

JAEA-Data-Code-2013-001.pdf:23.85MB

Japan Atomic Energy Agency has been investigated the groundwater chemistry on excavating the underground facilities as part of the Mizunami Underground Research Laboratory (MIU) Project at Mizunami, Gifu, Japan. This report compiles data of the groundwater chemistry obtained at MIU in the fiscal year 2011. In terms of ensuring traceability of data, basic information (e.g. sampling location, sampling date, sampling method, analytical method) and methodology for quality control is described.

JAEA Reports

Hydrochemical investigation at the Mizunami Underground Research Laboratory; Compilation of groundwater chemistry in the Mizunami group and Toki granite (fiscal year 2010)

Shingu, Shinya; Hagiwara, Hiroki; Masuda, Kaoru*; Iizuka, Masatoshi*; Inui, Michiharu*; Mizuno, Takashi

JAEA-Data/Code 2012-003, 50 Pages, 2012/06

JAEA-Data-Code-2012-003.pdf:4.61MB
JAEA-Data-Code-2012-003-appendix(CD-ROM).zip:226.3MB

Japan Atomic Energy Agency has been investigated the groundwater chemistry on excavating the underground facilities as part of the Mizunami Underground Research Laboratory (MIU) Project at Mizunami City, Gifu Prefecture, Japan. This report compiles data set of the groundwater chemistry obtained at MIU in the fiscal year 2010. In terms of ensuring traceability of data, basic information (e.g. sampling location, sampling date, sampling method, analytical method) and methodology for quality control is described.

Journal Articles

Distillation of cadmium from uranium-plutonium-cadmium alloy

Kato, Tetsuya*; Iizuka, Masatoshi*; Inoue, Tadashi*; Iwai, Takashi; Arai, Yasuo

Journal of Nuclear Materials, 340(2-3), p.259 - 265, 2005/04

 Times Cited Count:22 Percentile:82.13(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Electrochemical behaviors of uranium and plutonium at simultaneous recoveries into liquid cadmium cathodes

Uozumi, Koichi*; Iizuka, Masatoshi*; Kato, Tetsuya*; Inoue, Tadashi*; Shirai, Osamu*; Iwai, Takashi; Arai, Yasuo

Journal of Nuclear Materials, 325(1), p.34 - 43, 2004/02

 Times Cited Count:106 Percentile:98.95(Materials Science, Multidisciplinary)

Experiments were conducted on simultaneous recovering of uranium and plutonium electrochemically into laboratory scale liquid cadomium cathodes(LCCs) at different U/Pu ratios in the salt phase. The influence of the salt composition on the recovered amount of uranium and plutonium, the morphology of uranium and plutonium in the LCCs, and the behavior of americium were examined. It was shouwn that there is a threshold in the U/Pu ratio in the salt phase for the successful simultaneous recovery of uranium and plutonium up to 10wt% in high current efficiencies.

Journal Articles

Behavior of plutonium and americium at liquid cadmium cathode in molten LiCl-KCl electrolyte

Iizuka, Masatoshi*; Uozumi, Koichi*; Inoue, Tadashi*; Iwai, Takashi; Shirai, Osamu; Arai, Yasuo

Journal of Nuclear Materials, 299(1), p.32 - 42, 2001/10

 Times Cited Count:74 Percentile:97.77(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Electrode reaction of the Np$$^{3+}$$/Np couple in LiCl-KCl eutectic melts

Shirai, Osamu; Iizuka, Masatoshi*; Iwai, Takashi; Arai, Yasuo

Journal of Applied Electrochemistry, 31(9), p.1055 - 1060, 2001/09

 Times Cited Count:20 Percentile:47(Electrochemistry)

no abstracts in English

Journal Articles

Electrode reaction of the Pu$$^{3+}$$/Pu couple in LiCl-KCl eutectic melts; Comparison of the electrode reaction at the surface of liquid Bi with that at a solid Mo electrode

Shirai, Osamu; Iizuka, Masatoshi*; Iwai, Takashi; Arai, Yasuo

Analytical Sciences, 17(1), p.51 - 57, 2001/01

 Times Cited Count:47 Percentile:81.14(Chemistry, Analytical)

no abstracts in English

Journal Articles

Recovery of Neptunium by electrolysis of NpN in LiCl-KCl eutectic melts

Shirai, Osamu; Iizuka, Masatoshi*; Iwai, Takashi; Suzuki, Yasufumi; Arai, Yasuo

Journal of Nuclear Science and Technology, 37(8), p.676 - 681, 2000/08

no abstracts in English

Journal Articles

Development of plutonium recovery process by molten salt electrorefining; Behavior of plutonium at liquid cadmium cathode

Iizuka, Masatoshi*; Inoue, Tadashi*; Iwai, Takashi; Shirai, Osamu; Arai, Yasuo

Denryoku Chuo Kenkyusho Hokoku (T99078), 24 Pages, 2000/06

no abstracts in English

Journal Articles

Development of plutonium recovery process by molten salt electrorefining with liquid cadmium cathode

Iizuka, Masatoshi*; Uozumi, Koichi*; Inoue, Tadashi*; Iwai, Takashi; Shirai, Osamu; Arai, Yasuo

Proceedings of 6th International Exchange Meeting on Actinide and Fission Product Partitioning and Transmutation (CD-ROM), p.327 - 341, 2000/00

no abstracts in English

Oral presentation

Development of anodic dissolution of spent metallic fuel electrorefining process, 1; Anodic dissolution test of U-Pu-Zr alloy fuel

Sakamura, Yoshiharu*; Murakami, Tsuyoshi*; Akiyama, Naoyuki*; Iizuka, Masatoshi*; Kitawaki, Shinichi; Nakayoshi, Akira

no journal, , 

no abstracts in English

Oral presentation

Reduction behaviors of zirconium oxide compounds in LiCl-Li$$_{2}$$O melt

Sakamura, Yoshiharu*; Iizuka, Masatoshi*; Koyama, Tadafumi*; Kitawaki, Shinichi; Nakayoshi, Akira; Kofuji, Hirohide

no journal, , 

An electrolytic reduction process of oxide fuels has recently been developed, however it was found that the behaviors of rare earth elements and zirconium are expected to be complicate because their oxides are stable and complex oxide compounds may form. After Fukushima- Daiichi reactor accident, studies on applicability of pyrometallurgical process to damaged fuel debris consisting of ZrO$$_{2}$$-UO$$_{2}$$ have been started. In this study, reduction behaviors of ZrO$$_{2}$$, ZrO$$_{2}$$-Li$$_{2}$$O and ZrO$$_{2}$$-UO$$_{2}$$ were investigated. It was proved that ZrO$$_{2}$$ can be reduced to metallic form in LiCl melt and that ZrO$$_{2}$$ easily reacts with dissolved Li$$_{2}$$O to give Li$$_{2}$$ZrO$$_{3}$$. After ZrO$$_{2}$$ is converted to Li$$_{2}$$ZrO$$_{3}$$, zirconium metal is hardly obtained even in a LiCl melt with low Li$$_{2}$$O concentration.

Oral presentation

Behavior of ZrO$$_{2}$$ in LiCl-Li$$_{2}$$O melt

Sakamura, Yoshiharu*; Iizuka, Masatoshi*; Kitawaki, Shinichi; Nakayoshi, Akira; Kofuji, Hirohide

no journal, , 

Zirconium dioxide formed complex oxide like Li$$_{2}$$ZrO$$_{3}$$ or Li$$_{8}$$ZrO$$_{6}$$ according to the concentration of Li$$_{2}$$O in the LiCl-Li$$_{2}$$O melt. It was clarified that ZrO$$_{2}$$ could be reduced to metal and formed lithium zirconate was difficult to be reduced by electrolytic reduction operations.

Oral presentation

Reduction behaviors of zirconium oxide compounds in LiCl-Li$$_{2}$$O

Kitawaki, Shinichi; Nakayoshi, Akira; Kofuji, Hirohide; Sakamura, Yoshiharu*; Iizuka, Masatoshi*

no journal, , 

no abstracts in English

Oral presentation

Reduction behavior of zirconium oxide in LiCl-Li$$_{2}$$O melt

Sakamura, Yoshiharu*; Iizuka, Masatoshi*; Kitawaki, Shinichi; Nakayoshi, Akira; Kofuji, Hirohide

no journal, , 

no abstracts in English

Oral presentation

Evaluation of debris treatment method using electro-reduction technique in the molten salt

Kofuji, Hirohide; Iizuka, Masatoshi*; Sakamura, Yoshiharu*; Murakami, Tsuyoshi*; Kitawaki, Shinichi; Glatz, J. P.*

no journal, , 

no abstracts in English

Oral presentation

Novel pyroprocess with a high separation efficiency of actinides from lanthanides, 2; Equilibrium distributions of actinides and lanthanides in molten chloride salt and liquid Gallium/Aluminum system

Kitawaki, Shinichi; Nakayoshi, Akira; Kofuji, Hirohide; Murakami, Tsuyoshi*; Sakamura, Yoshiharu*; Iizuka, Masatoshi*; Ando, Hidekazu*; Nohira, Toshiyuki*

no journal, , 

The MA recovery process by dry process was studied for partitioning and transmutation scenario. We measured equilibrium separation factor by the experiments of reduction extraction using liquid Ga/Al and chloride molten salt. The experimental results, as compared with the case of using a liquid Cd, high separation efficiency for the rare earth element was obtained.

Oral presentation

Electrochemical behavior of lanthanides and actinides on a liquid Ga electrode in molten chlorides melts

Murakami, Tsuyoshi*; Sakamura, Yoshiharu*; Iizuka, Masatoshi*; Nohira, Toshiyuki*; Kitawaki, Shinichi; Kofuji, Hirohide

no journal, , 

38 (Records 1-20 displayed on this page)