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Journal Articles

Reduction kinetics of Np(VI) by $$n$$-butyraldehyde in tributyl phosphate diluted with $$n$$-dodecane

Ban, Yasutoshi; Asakura, Toshihide; Morita, Yasuji

Radiochimica Acta, 92(12), p.883 - 887, 2004/12

 Times Cited Count:9 Percentile:54.8(Chemistry, Inorganic & Nuclear)

The reduction kinetics of Np(VI) by $$n$$-butyraldehyde in 30%TBP solution diluted with $$n$$-dodecane were analyzed by spectrophotometry. Based on the results of both $$n$$-butyraldehyde and nitric acid concentration dependencies on the Np(VI) reduction reaction, the rate equation was obtained as -d$$t$$[Np(VI)]/d$$t$$ = $$k$$[$$n$$-C$$_{3}$$H$$_{7}$$CHO]$$^{0.8}$$[HNO$$_{3}$$]$$^{-2.0}$$[Np(VI)]$$_{t}$$ where $$k$$ = (1.0$$pm$$0.2) $$times$$ 10$$^{-3}$$ M$$^{1.2}$$min$$^{-1}$$ at 294 $$pm$$ 1 K. The activation energy of the reaction was 76 $$pm$$ 5 kJ/mol. Redox equilibrium between Np(V) and N(VI), and reaction mechanism were discussed.

Journal Articles

Advanced technologies for long-lived nuclides separation in reprocessing

Uchiyama, Gunzo; Mineo, Hideaki; Asakura, Toshihide; Hotoku, Shinobu

Proceedings of International Conference on Back-End of the Fuel Cycle: From Research to Solutions (GLOBAL 2001) (CD-ROM), 8 Pages, 2001/09

no abstracts in English

Journal Articles

Management of minor long-lived nuclides in nuclear fuel reprocessing

Uchiyama, Gunzo; Mineo, Hideaki; Asakura, Toshihide; Hotoku, Shinobu; Kamei, Kazushige; Watanabe, Makio; Fujine, Sachio

Proceedings of 12th Pacific Basin Nuclear Conference (PBNC 2000), Vol.1, p.531 - 538, 2000/00

no abstracts in English

Journal Articles

Reduction of minor nuclides in nuclear fuel reprocessing

Uchiyama, Gunzo; Mineo, Hideaki; Asakura, Toshihide; Hotoku, Shinobu; Kamei, Kazushige; Watanabe, Makio; Fujine, Sachio

Proceedings of 2nd International Conference on Safewaste 2000, Vol.2, p.689 - 700, 2000/00

no abstracts in English

Journal Articles

Management of neptunium and technetium in an advanced PUREX process

Uchiyama, Gunzo; Hotoku, Shinobu; Watanabe, Makio; Kamei, Kazushige; Mineo, Hideaki; Nakano, Yuji*; Kimura, Shigeru; Asakura, Toshihide; Fujine, Sachio

Proceedings of 7th International Conference on Radioactive Waste Management and Environmental Remediation (ICEM '99) (CD-ROM), p.5 - 0, 1999/00

no abstracts in English

Journal Articles

Reduction of neptunium (VI) by butyraldehyde isomers in nitric acid solution

Uchiyama, Gunzo; Hotoku, Shinobu; Fujine, Sachio; Maeda, Mitsuru

Nuclear Technology, 122(2), p.222 - 227, 1998/05

 Times Cited Count:14 Percentile:74.48(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Destruction of butyraldehyde isomers using silver catalyzed electrochemical oxidation

Uchiyama, Gunzo; Fujine, Sachio

Journal of Radioanalytical and Nuclear Chemistry, 230(1-2), p.105 - 109, 1998/00

 Times Cited Count:3 Percentile:32.94(Chemistry, Analytical)

no abstracts in English

Journal Articles

Extraction behaviors of uranium, plutonium, neptunium and technetium in PARC process

Uchiyama, Gunzo; Asakura, Toshihide; Hotoku, Shinobu; Fujine, Sachio

Proc. of 5th Int. Nucl. Conf. on Recycling, Conditioning and Disposal (RECOD '98), 1, p.393 - 400, 1998/00

no abstracts in English

Journal Articles

The Separation of neptunium and technetium in an advanced Purex process

Uchiyama, Gunzo; Asakura, Toshihide; Hotoku, Shinobu; Fujine, Sachio

Solvent Extr. Ion Exch., 16(5), p.1191 - 1213, 1998/00

no abstracts in English

Journal Articles

Distribution of n-and iso-butyraldehydes between tri-n-butyl phosphate/n-dodecane and nitric acid

Uchiyama, Gunzo; Fujine, Sachio; Hotoku, Shinobu; Maeda, Mitsuru

Solvent Extr. Ion Exch., 15(5), p.863 - 877, 1997/00

 Times Cited Count:2 Percentile:19.85(Chemistry, Multidisciplinary)

no abstracts in English

Journal Articles

A New separation process of neptunium, technetium, plutonium and uranium using butyraldehydes as reductants in nuclear fuel reprocessing

Uchiyama, Gunzo; Asakura, Toshihide; ; Fujine, Sachio; Maeda, Mitsuru

Value Adding Through Solvent Extraction (Proc. of ISEC 96), 2, p.1291 - 1296, 1996/00

no abstracts in English

JAEA Reports

Separation of neptunium, plutonium and uranium by using butyraldehydes as reductants in reprocessing

Uchiyama, Gunzo; Hotoku, Shinobu; Fujine, Sachio; Maeda, Mitsuru

JAERI-M 93-198, 27 Pages, 1993/10

JAERI-M-93-198.pdf:0.92MB

no abstracts in English

Journal Articles

New separation process for neptunium plutonium, and uranium using butyraldehydes as reductants in reprocessing

Uchiyama, Gunzo; Fujine, Sachio; Hotoku, Shinobu; Maeda, Mitsuru

Nuclear Technology, 102, p.341 - 352, 1993/06

 Times Cited Count:40 Percentile:94.74(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Process study on neptunium separation using salt-free reductive reagent

Uchiyama, Gunzo; Hotoku, Shinobu; Kihara, Takehiro; Fujine, Sachio; Maeda, Mitsuru

Solvent Extraction 1990, Part A, p.675 - 680, 1992/00

no abstracts in English

14 (Records 1-14 displayed on this page)
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