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

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.

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

https://doi.org/10.1016/j.jnucmat.2003.10.010

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.

Electrode reaction of the Np/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

https://doi.org/10.1023/A:1017987110008

no abstracts in English

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

https://doi.org/10.3327/jnst.37.676

no abstracts in English

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

Reduction behaviors of zirconium oxide compounds in LiCl-LiO melt

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

no journal, , 

http://www.cse.anl.gov/nuclear_enviro_processes/pyroprocess_conference/presentations/Wednesday_PM/Sakamura_Zirconium%20Behaviors.pdf

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-UO have been started. In this study, reduction behaviors of ZrO, ZrO-LiO and ZrO-UO were investigated. It was proved that ZrO can be reduced to metallic form in LiCl melt and that ZrO easily reacts with dissolved LiO to give LiZrO. After ZrO is converted to LiZrO, zirconium metal is hardly obtained even in a LiCl melt with low LiO concentration.

Reduction behaviors of zirconium oxide compounds in LiCl-LiO

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

no journal, , 

no abstracts in English

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

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, ,