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Amamoto, Ippei; Kofuji, Hirohide; Myochin, Munetaka; Takasaki, Yasushi*; Yano, Tetsuji*; Terai, Takayuki*
Nuclear Technology, 171(3), p.316 - 324, 2010/09
Times Cited Count：11 Percentile：59.05(Nuclear Science & Technology)The separation technique by phosphate conversion of FP from NaCl-KCl or NaCl-2CsCl as the medium of the spent electrolyte of pyroprocessing is being developed at RIAR in Russia. To ascertain the technical feasibility of applying this RIAR's method for recycling of spent electrolyte which composed of FP such as AL, ALE, and REE and 3LiCl-2KCl as the medium, preliminary study was undertaken at JAEA. This study occupies an auxiliary role which is forwarded as a part of FaCT Project of Japan. As a first approach, the thermodynamic analysis to understand the behaviours of FP in the electrolyte was carried out after literature research and acquisition of required thermodynamic properties. Preliminary experiment was then undertaken to observe the conversion behaviours of chlorides to phosphate. In this paper, these results are shown and are evaluated to discern the feasibility of the phosphate conversion method.
Kitawaki, Shinichi; Shinozaki, Tadahiro; Fukushima, Mineo; Usami, Tsuyoshi*; Yahagi, Noboru*; Kurata, Masaki*
Nuclear Technology, 162(2), p.118 - 123, 2008/05
Times Cited Count：18 Percentile：74.42(Nuclear Science & Technology)A series test of pyro-process was carried out to recover U-Pu alloy from MONJU MOX pellets. In the Li-reduction step, the reduction behavior of MOX was similar to that of UO
. In the electrorefining step, the separation factor between U and Pu was 5.7 for the combination of reduced MOX anode and liquid cadmium cathode, which is almost comparable to the value in the previous studies. For the material balance, approximately 98% of U and 103% of Pu were detected in the electrodes or molten salt after the electrolysis with respect to the initial amounts in the anode or molten salt. Considering the analytical error of ICP-AES, these values are reasonable. The remained amount of U in the anode was slightly larger than that of Pu due to the re-oxidation. The U-Pu alloy ingot was successfully formed by distillation of Cd.
Hayashi, Hirokazu; Akabori, Mitsuo; Minato, Kazuo; Haire, R. G.*
no journal, ,
The electrochemical behavior of Am at a liquid Cd cathode and the alloying behavior of Am with Cd were analyzed. In the cyclic voltammograms obtained with Mo electrode, the redox reactions of Am(III)/Am(II) and Am(II)/Am were observed, while peaks assigned to Am(III)/Am (in Cd) were observed with liquid Cd electrode. The observed electric potentials for the peaks with liquid Cd electrode were more positive than those with Mo electrode. The difference in the potentials 
E(Am-Cd) was 0.39V, which is similar to E(Pu-Cd) and much larger than E(U-Cd) and E(Np-Cd). It is reported that E(An-Cd) (An=U, Np, Pu) corresponds to G
of An-Cd compound formed at Cd electrode (UCd
, NpCd
, PuCd). On the other hand, to identify the stable chemical form on Am-Cd phase diagram, Am-Cd intermetallic compounds were prepared by heating 
Am metal with liquid Cd. The product prepared by heating at 723K was identified as cubic AmCd
with a
=1.559 
0.002 nm by powder X-ray diffraction. AmCd is considered to be formed at Cd electrode on the electrochemical experiments because it is the stable product at 723K.
Minato, Kazuo; Arai, Yasuo
no journal, ,
no abstracts in English
Arai, Yasuo; Hayashi, Hirokazu; Sato, Takumi; Shibata, Hiroki; Iwai, Takashi; Akabori, Mitsuo; Minato, Kazuo
no journal, ,
no abstracts in English
