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Sato, Takumi; Shibata, Hiroki; Hayashi, Hirokazu; Takano, Masahide; Kurata, Masaki
Journal of Nuclear Science and Technology, 52(10), p.1253 - 1258, 2015/10
Times Cited Count:7 Percentile:47.45(Nuclear Science & Technology)In order to explore the applicability of the chlorination by MoCl as a potential pretreatment technique for waste treatment of fuel debris by pyrochemical methods, chlorination experiments of UO
and (U
Zr
)O
simulated fuel debris were carried out in two steps: the first one is a chlorination reaction by homogeneous heating, the second one is a volatilization of molybdenum by-product by heating under temperature gradient condition. Most of UO
and (U
Zr
)O
powder were converted to UCl
or UCl
and ZrCl
mixture at 573 K, respectively. In the case of (U
Zr
)O
sintered particle, most of sample was converted to the chlorides because the products evaporated and be separated from sample surface at 773 K, while only the surface of the sample disk was converted to the chlorides at 573 and 673 K. Most of molybdenum by-product and ZrCl
were separated from UCl
by volatilization at 573 K.
Hirota, Koichi; Kojima, Takuji
Bulletin of the Chemical Society of Japan, 78(9), p.1685 - 1690, 2005/09
Times Cited Count:8 Percentile:33.97(Chemistry, Multidisciplinary)Decomposition behavior under electron-beam irradiation was examined for polychlorinated dibenzo-p-dioxin (PCDD) and polychlorinated dibenzofuran (PCDF) isomers in incinerator gases. Significant decomposition was obtained for all PCDD isomers over the investigated absorbed doses, which was resulted from oxidation reactions with OH radicals yielded by electron-beam irradiation. In the case of PCDFs, specific isomers having symmetrical structures such as 1, 2, 8, 9-, 2, 3, 7, 8-, and 3, 4, 6, 7-TeCDFs were yielded through the dechlorination of PeCDF isomers. Thermal electrons probably played a role in the dechlorination of PeCDF isomers.
Sakamura, Yoshiharu*; Inoue, Tadashi*; Iwai, Takashi; Moriyama, Hirotake*
Journal of Nuclear Materials, 340(1), p.39 - 51, 2005/04
Times Cited Count:47 Percentile:92.91(Materials Science, Multidisciplinary)A new chlorination method using ZrCl in a molten salt has been investigated for the pyrometallurgical reprocessing of spent oxide fuels. UO
, PuO
and rare earth oxides(La
O
, CeO
, Nd
O
and Y
O
) were allowed to react with ZrCl
in a LiCl-KCl eutectic salt at 500
C to give a metal chloride solution and a precipitate of ZrO
. By keeping the system quite still, the solution settled so that the ZrO
precipitate could be separated.
Yamauchi, Toshihiko; Ito, Shinichi*; Minehara, Eisuke
Technical Digest on 4th Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim 2001), p.I_148 - I_149, 2001/00
The decomposition of dioxin analogues by infrared (IR) laser irradiation includes thermal destruction and multiple-photon dissociation. It is important for the decomposition to choose the laser wavelength which is highly absorbed. The thermal decomposition takes place by the irradiation of the low IR laser power. Considering the model of thermal decomposition, it is discussed that the adjacent water vapor assists the decomposition (dechlorination) of dioxin analogues in addition to the thermal decomposition by the direct laser absorption.
X.Huang*; Arai, Hidehiko; Matsuhashi, Shimpei; Miyata, Teijiro
Chemistry Letters, 0(2), p.159 - 160, 1996/00
no abstracts in English
; ;
Water Res., 20(7), p.885 - 891, 1986/00
Times Cited Count:32 Percentile:81.93(Engineering, Environmental)no abstracts in English
; ;
Chemistry Letters, 8, p.1435 - 1436, 1984/00
Times Cited Count:10no abstracts in English