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Journal Articles

Measurement and analysis of reactivity worth of $$^{241}$$Am sample in water-moderated low-enriched UO$$_2$$ fuel lattices at TCA

Sakurai, Takeshi; Mori, Takamasa; Suzaki, Takenori*; Okajima, Shigeaki; Ando, Yoshihira*; Yamamoto, Toru*; Liem, P. H.*

Journal of Nuclear Science and Technology, 48(5), p.816 - 825, 2011/05

https://doi.org/10.3327/jnst.48.816
 Times Cited Count：2 Percentile：17.11(Nuclear Science & Technology)

Journal Articles

Selective extraction of Americium(III) over macroscopic concentration of Lanthanides(III) by synergistic system of TPEN and D2EHPA in 1-octanol

Watanabe, Masayuki; Mirvaliev, R.*; Tachimori, Shoichi; Takeshita, Kenji*; Nakano, Yoshio*; Morikawa, Koshi*; Chikazawa, Takahiro*; Mori, Ryohei*

Solvent Extraction and Ion Exchange, 22(3), p.377 - 390, 2004/06

https://doi.org/10.1081/SEI-120030391
 Times Cited Count：34 Percentile：66.30(Chemistry, Multidisciplinary)

The synergistic extraction with N,N,N',N'-tetrakis(2-methylpyridyl)-ethylenediamine (TPEN) and di(2-ethylhexyl)phosphoric acid (D2EHPA) demonstrates a good selectivity for Am(III) over macro amount of Ln(III) in 1-octanol. The maximum apparent separation factor, which is defined as the ratio of the distribution ratio of Am(III) to that of Eu(III), is ca. 80 while the molar fraction between D2EHPA and TPEN is 2.0. This ratio is corresponding to the result of the spectrophotometric titration, which indicates that TPEN and D2EHPA form an aggregate in 1-octanol and two D2EHPA molecules coordinate to Eu(III) TPEN complex, [Eu(TPEN)]$$^{3+}$$. In the present study, the association of D2EHPA and TPEN is one of the most important factors for the synergistic extraction and the complexation of TPEN and D2EHPA with Eu(III).

Journal Articles

Separation of americium(III) from lanthanide by encapsulating hexadentate-ligand

Watanabe, Masayuki; Mirvaliev, R.*; Tachimori, Shoichi; Takeshita, Kenji*; Nakano, Yoshio*; Morikawa, Koshi*; Mori, Ryohei*

Chemistry Letters, 31(12), p.1230 - 1231, 2002/12

https://doi.org/10.1246/cl.2002.1230
 Times Cited Count：40 Percentile：72.67(Chemistry, Multidisciplinary)

Encapsulative semi-podand type ligand, N, N, N', N' #8211; tetrakis(2-methylpyridyl)ethylenediamine (TPEN) gives good selectivity of Am(III) over trivalent lanthanide by solvent extraction. This is the first robust extraction system which can separate Am(III) from trivalent lanthanide.

JAEA Reports

None

; Fumoto, Hiromichi*;

JNC TJ6410 99-001, 57 Pages, 1999/03

JNC-TJ6410-99-001.pdf:3.15MB

JAEA Reports

Deveropment of Partitioning Method : Dynamic Adsorption Characteristics of Titanic Acid and Zeolite mixed Column for Sr and Cs Ions

; ;

JAERI-M 86-013, 14 Pages, 1986/02

JAERI-M-86-013.pdf:0.66MB

no abstracts in English

Oral presentation

Am-241 sample reactivity experiments in TCA, 1; Measurement results and evaluation of uncertainty in calculation caused by nuclear data uncertainty

Sakurai, Takeshi; Mori, Takamasa; Suzaki, Takenori*; Okajima, Shigeaki; Ando, Yoshihira*; Yamamoto, Toru*

no journal, , 

Measurement and analysis have been made for the reactivity worth of Am-241 oxide sample(23 g) in water-moderated low-enriched UO$$_{2}$$ fuel lattices with water-to-fuel volume ratios ranging from 0.56 to 3.0 at TCA of JAEA to validate the capture cross section of Am-241 of thermal to resonance energy region in current nuclear data library. The reactivity worth of sample at the core center was measured with uncertainty of 0.4% $$sim$$ 2.1%. The analysis was made by using the continuous energy Monte Carlo transport code MVP with JENDL-3.3 nuclear data. The reactivity worth was calculated from difference of effective multiplication factors and was obtained with statistical uncertainties of 0.6% $$sim$$ 1.1%. The calculation underestimated the measurement by 4% $$sim$$ 9%. Furthermore, an evaluation was made for the uncertainty in calculation caused by nuclear data uncertainty to investigate the present discrepancy between calculation and measurement.

Oral presentation

Am-241 sample reactivity experiments in TCA, 2; Analysis of experimental cores and sensitivity analysis on Am-241 cross sections

Ando, Yoshihira*; Yamamoto, Toru*; Sakurai, Takeshi; Okajima, Shigeaki; Mori, Takamasa; Liem, P. H.*

no journal, , 

no abstracts in English

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