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JAEA Reports

Countercurrent extraction/stripping experiments using TDdDGA solvent extractant in a centrifugal contactor system,2; Evaluation on the improved flowsheet for MA recovery

Kibe, Satoshi; Fujisaku, Kazuhiko*; Sakamoto, Atsushi; Sano, Yuichi; Takeuchi, Masayuki; Suzuki, Hideya; Tsubata, Yasuhiro; Matsumura, Tatsuro

JAEA-Research 2016-024, 40 Pages, 2017/02

JAEA-Research-2016-024.pdf:6.73MB

The Japan Atomic Energy Agency has been developing some flowsheets with TDdDGA (N,N,N,Ntetradodecyldiglycolamide) extractant to recover MA (minor actinide) from raffinate. In this study, countercurrent experiments with the improved flowsheet, e.g. the addition of alcohol into the solvent for preventing the precipitation, were performed using miniature centrifugal contactors in order to compare the extraction/stripping behavior of each element with the mixer-settler type. As a result, no entrainments were observed and sufficient phase separation was achieved by centrifugal contactors without any abnormal fluid behavior, such as overflow. The extraction and stripping of Ln(III) which show the similar tendencies as MA could be achieved successfully, especially their stripping proceeded more efficiently in centrifugal contactors. This might be due to the increase in stripping rates by improving the flowsheet and to superior phase separation performance of centrifugal contactors.

JAEA Reports

Countercurrent extraction/stripping experiments using TDdDGA solvent extractant in a centrifugal contactors system

Kibe, Satoshi; Fujisaku, Kazuhiko*; Ambai, Hiromu; Sakamoto, Atsushi; Sano, Yuichi; Takeuchi, Masayuki; Suzuki, Hideya; Tsubata, Yasuhiro; Matsumura, Tatsuro

JAEA-Research 2015-021, 40 Pages, 2016/02

JAEA-Research-2015-021.pdf:2.3MB

The flowsheet with TDdDGA extractant has been being developed for recovering MA from PUREX raffinate. In the previous study, the yields of MA and other elements in countercurrent extraction/stripping experiments using mixer-settlers were not enough for the target and it would be due to the insufficient phase (aqueous/organic) separation. In this study, we carried out countercurrent experiments with surrogate PUREX raffinate using centrifugal contactors which had superior phase separation ability, and evaluated the extraction/stripping behavior of each element. During the operation, abnormal fluid behavior, such as overflow and entrainment, was not observed, and sufficient phase separation was achieved by centrifugal contactors. Extraction behavior of lanthanides was similar to that in mixer-settlers, but their stripping efficiencies decreased. This would be due to shorter residence time in mixing zone.

Journal Articles

High-efficiency contact grating fabricated on the basis of a Fabry-Perot type resonator for terahertz wave generation

Yoshida, Fumiko; Nagashima, Keisuke; Tsubouchi, Masaaki; Ochi, Yoshihiro; Maruyama, Momoko; Sugiyama, Akira

Japanese Journal of Applied Physics, 55(1), p.012201_1 - 012201_5, 2016/01

 Times Cited Count:6 Percentile:33.92(Physics, Applied)

Journal Articles

Conversion of hydrophilic surface of poly(ethylene terephthalate) film surface to hydrophobic one under hydrophilic condition

Suzuki, Yasuyuki*; Li, J.; Maekawa, Yasunari; Yoshida, Masaru; Maeyama, Katsuya*; Yonezawa, Noriyuki*

Nihon Kagakkai-Shi, 2002(2), p.255 - 259, 2002/02

The hydrophilic surface of poly(ethylene terephthalate) (PET) film, obtained by partial hydrolysis, was converted to hydrophobic one under dry air, saturated water vapor atmosphere, nitrogen, and vacuum at temperatures ranging from 0 to 80$$^{circ}$$C. The hydrophilicity of the surface increased significantly faster under the saturated water vapor although it was the most hydrophilic in the examined conditions. From the dependence of the absolute temperature on the rate of hydrophilicity change for each storage condition, a discontinuous point at ca. 50$$^{circ}$$C was observable only under the water vapor condition. This relation indicates that the appreciable acceleration of the hydrophilicity change on the surface under the hydrophilic condition might be resulted from the increase of the surface mobility due to the water adsorption on the PET surface.

Journal Articles

Application of neutron radiography to visualization of direct contact heat exchange between water and low melting point alloy

Nishi, Yoshihisa*; *; *; *; Matsubayashi, Masahito; Tsuruno, Akira

Fifth World Conf. on Neutron Radiography, 0, p.548 - 555, 1996/00

no abstracts in English

Journal Articles

Evaluation of structural integrity on cylindrical graphite component with spherical contact

Ishihara, Masahiro; Iyoku, Tatsuo; Futakawa, Masatoshi

Zairyo, 42(472), p.15 - 21, 1993/01

no abstracts in English

Journal Articles

Simulation code SAFE for analyzing transient solvent extraction behavior

Maeda, Mitsuru; Fujine, Sachio; *; *

Transactions of the American Nuclear Society, 66, p.78 - 80, 1992/11

no abstracts in English

Journal Articles

Hydrodynamic characteristics of a single stage annular type centrifugal extractor

Fujine, Sachio; M.Kluth*; J.Lamla*; H.Goldacker*

Proc. of the Symp. on Solvent Extraction 1989, p.141 - 146, 1989/00

no abstracts in English

Journal Articles

Oscillatory flows induced by direct contact condensation of flowing steam with injected water

; *; *; *; *

Journal of Nuclear Science and Technology, 22(4), p.269 - 283, 1985/00

 Times Cited Count:5 Percentile:60.42(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Analysis of direct contact condensation of flowing steam onto injected water with a multifluid model of two-phase flow

; Kozawa, Yoshiyuki*; *; *

Journal of Nuclear Science and Technology, 20(12), p.1006 - 1022, 1983/00

 Times Cited Count:8 Percentile:68.8(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

JAEA Reports

Journal Articles

Journal Articles

Isotope separation by multiple contact, 2; Analytical procedure for frontal process

;

Journal of Nuclear Science and Technology, 4(11), p.570 - 577, 1967/00

 Times Cited Count:2

no abstracts in English

Journal Articles

Heat transfer between metallic surfaces in contact

Sanokawa, Konomo

Bull.Japan Soc.Precision Engng., 1(4), p.300 - 305, 1966/00

no abstracts in English

Oral presentation

Evaluation of the flowsheet with TDdDGA by counter-current trials using mixer-settlers and centrifugal contactors

Sano, Yuichi; Kibe, Satoshi; Sakamoto, Atsushi; Takeuchi, Masayuki; Suzuki, Hideya; Tsubata, Yasuhiro; Matsumura, Tatsuro

no journal, , 

The flowsheet with TDdDGA extractant for recovering MA(III) from PUREX raffinate was evaluated by counter-current trials with surrogate PUREX raffinate using mixer-settlers and centrifugal contactors. The extraction and back-extraction of Ln(III) which show the similar tendencies as MA(III) could be achieved successfully, especially their back-extraction proceeded more efficiently in centrifugal contactors, which might be due to superior phase separation performance of centrifugal contactors.

Oral presentation

Evaluation method of deformation modulus of rock mass by borehole jack test considering the mismatch in curvature of platen and borehole

Kawakubo, Shohei*; Ono, Hirokazu; Matsui, Hiroya; Kato, Takeshi*

no journal, , 

no abstracts in English

Oral presentation

19 (Records 1-19 displayed on this page)
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