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Murakami, Tsuyoshi*; Hayashi, Hirokazu
Journal of Nuclear Materials, 558, p.153330_1 - 153330_7, 2022/01
Times Cited Count：0 Percentile：0.01(Materials Science, Multidisciplinary)Excess amounts of dissolution agents, CdCl
and ZrCl
, are required to dissolve transuranium (TRU: Pu and minor actinides) nitrides into LiCl-KCl melts at the chemical dissolution step, which is the first step in the reprocessing of used nitride fuels. We propose an electrochemical process where the remaining Zr and Cd are recovered from the melts to be recycled as dissolution agents for the chemical dissolution step, leaving TRU in the melts. Since the initial concentration ratio of CdCl/ZrCl remaining in the melts would depend on the condition of the chemical dissolution step and would vary during the proposed electrochemical recovery process, electrochemical behaviors of Zr and Cd were investigated in LiCl-KCl melts with various concentration ratios of CdCl/ZrCl at 723 K to confirm the basic feasibility of the proposed process. Potentiostatic electrolysis was performed using a liquid Cd cathode at -1.05 V (vs. Ag/AgCl), which was a more positive potential than the redox potentials of TRU on the liquid Cd electrode. The obtained results showed that the current efficiency for recovering Zr and Cd from the melts was as high as 100% regardless of the CdCl/ZrCl concentration ratio in the melts.
Harada, Masahide; Parker, J. D.*; Oikawa, Kenichi; Kai, Tetsuya; Shinohara, Takenao
JPS Conference Proceedings (Internet), 8, p.035002_1 - 035002_5, 2015/09
We found that Cadmium (Cd) was not only a suitable thermal neutron absorber as a poison material in a pulsed spallation neutron source, but also had a long life time with a small sacrifice in neutron intensities at an intense source. Therefore, we decided to use Cd as the poison material in the first moderator in JSNS/J-PARC. In the development stage of JSNS, canning of a Cd plate by an Al-alloy with the Cold Isostatic Pressing method failed and the Al-alloy cover of the Cd plate was broken. In order to correct the manufacturing process, we have to observe the inside of the sample to find the reason for failure. To investigation the inside of the canning Cd plate non-destructively, we applied the energy selective neutron imaging method. We measured the transmission of the canning Cd plate used by the micro-pixel chamber (
PIC) neutron detector at NOBORU (BL10) in JSNS. As a result, several vacancies could be found and the distribution of the amount of Cd could be also obtained.
-ray spectroscopyToh, Yosuke; Oshima, Masumi; Koizumi, Mitsuo; Osa, Akihiko; Kimura, Atsushi; Goto, Jun*; Hatsukawa, Yuichi
Applied Radiation and Isotopes, 64(7), p.751 - 754, 2006/07
Times Cited Count：9 Percentile：53.28(Chemistry, Inorganic & Nuclear)no abstracts in English
Nakai, Hisaaki*; Seko, Noriaki; Tamada, Masao; Temma, Tsuyoshi*; Oguma, Masaomi*
Nihon Ion Kokan Gakkai-Shi, 15(1), p.10 - 15, 2004/01
Removal of cadmium from the boiled mid-gut gland of the scallop was investigated to utilize the waste of scallop processing for the fertilizer and the livestock feed. Twelve kinds of acid solutions (0.1M) were evaluated on the point of the cadmium elution, toxicity, and price. The selected malic acid could wash out cadmium less than 0.5ppm in the boiled mid-gut gland by optimizing the acid concentration and the repitaion of rinse. It was confirmed that the concentration of the eluted cadmium was reduced to 0.1ppm and less than by the iminodiacetic acid adsorbent synthesized with radiation-induced graftpolymerization.
Shiraishi, Tomoyuki*; Tamada, Masao; Saito, Kyoichi*; Sugo, Takanobu
Radiation Physics and Chemistry, 66(1), p.43 - 47, 2003/01
Times Cited Count：50 Percentile：93.85(Chemistry, Physical)no abstracts in English
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：76 Percentile：97.53(Materials Science, Multidisciplinary)no abstracts in English
Takeyama, Tomonori; Chiba, Masaaki; Isozaki, Futoshi*; Amezawa, Hiroo; Itabashi, Yukio; Kikuchi, Taiji; Otabe, Yoshikiyo*; Hirata, Yuji*; Taka, Isamu; Oba, Toshihiro
JAERI-Tech 2001-024, 32 Pages, 2001/03
JAERI-Tech-2001-024.pdf:4.41MB
no abstracts in English
Iizuka, Masatoshi*; Inoue, Tadashi*; Iwai, Takashi; Shirai, Osamu; Arai, Yasuo
Denryoku Chuo Kenkyusho Hokoku (T99078), 24 Pages, 2000/06
no abstracts in English
Tozawa, Katsuhiro; ; Kakehi, Isao
JNC TN9400 2000-052, 110 Pages, 2000/04
JNC-TN9400-2000-052.pdf:4.39MB
This report describes accomplishment of development of a cathode processor calculation code to simulate the mass and heat transfer phenomena with the distillation process and development of an analytical model for cooling behavior of the pyrochemical process cell on personal computers. The pyrochemical process using molten salt electrorefining would introduce new technologies for new fuels of particle oxide, particle nitride and metallic fuels. The cathode processor calculation code with distillation process was developed. A code validation calculation has been conducted on the basis of the benchmark problem for natural convection in a square cavity. Results by using the present code agreed well for the velocity-temperature fields, the maximum velocity and its location with the benchmark solution published in a paper. The functions have been added to advance the reality in simulation and to increase the efficiency in utilization. The test run has been conducted using the code with the above modification for an axisymmetric enclosed vessel simulating a cathode processor, and the capability of the distillation process simulation with the code has been confirmed. An analytical model for cooling behavior of the pyrochemical process cell was developed. The analytical model was selected by comparing benchmark analysis with detailed analysis on engineering workstation. Flow and temperature distributions were confirmed by the result of steady state analysis. In the result of transient cooling analysis, an initial transient peak of temperature occurred at balanced heat condition in the steady-state analysis. Final gas temperature distribution was dependent on gas circulation flow in transient condition. Then there were different final gas temperature distributions on the basis of the result of steady-state analysis. This phenomenon has a potential for it's own metastable condition. Therefore it was necessary to design gas cooling flow pattern without ...
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
Kodaira, Tsuneo; Tsuruno, Akira; Matsubayashi, Masahito
Genshiryoku Kogyo, 41(2), p.29 - 36, 1995/00
no abstracts in English
;
Bunseki Kagaku, 43, p.489 - 494, 1994/00
no abstracts in English
;
Analytica Chimica Acta, 172, p.39 - 47, 1985/00
Times Cited Count：7 Percentile：43.07(Chemistry, Analytical)no abstracts in English
and 
-CdUO
; Fujino, Takeo; Masaki, N.; *
Journal of Solid State Chemistry, 37, p.133 - 139, 1981/00
Times Cited Count：16 Percentile：59.48(Chemistry, Inorganic & Nuclear)no abstracts in English
*; Fujino, Takeo
Inorg.Nucl.Chem.Lett., 16(2), p.91 - 96, 1980/00
no abstracts in English
;
Journal of Radioanalytical Chemistry, 36, p.239 - 245, 1977/00
no abstracts in English
;
Journal of Inorganic and Nuclear Chemistry, 35(7), p.2592 - 2594, 1973/07
Times Cited Count：5no abstracts in English
;
JAERI 1052, 9 Pages, 1964/01
no abstracts in English
Bulletin of the Chemical Society of Japan, 37(10), p.1560 - 1561, 1964/00
Times Cited Count：2no abstracts in English
Okashita, Hiroshi
Bunseki Kagaku, 13(1), p.61 - 62, 1964/00
no abstracts in English
