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Journal Articles

Separation behaviors of actinides from rare-earths in molten salt electrorefining using saturated liquid cadmium cathode

Kato, Tetsuya*; Inoue, Tadashi*; Iwai, Takashi; Arai, Yasuo

Journal of Nuclear Materials, 357(1-3), p.105 - 114, 2006/10

 Times Cited Count:90 Percentile:98.63(Materials Science, Multidisciplinary)

Electrorefining in the molten LiCl-KCl eutectic salt containing actinides(An) and rare-earths(RE) was conducted to recover up to 10 wt% An into liquid Cd cathode, which is much higher than the solubility of An in liquid Cd at the experimental temperature. In the saturated Cd cathode, An and RE were recovered to form a compound of the PuCd$$_{11}$$ lattice, MCd$$_{11}$$. The separation factors of RE against Pu were defined as (RE/Pu in the Cd cathode)/(RE/Pu in the salt) and calculated for the saturated Cd alloy including MCd$$_{11}$$. The separation factors for the Cd cathodes were a little larger than the equilibrium values.

Journal Articles

Hydration structure of Y$$^{3+}$$ and La$$^{3+}$$ compared; An Application of metadynamics

Ikeda, Takashi; Hirata, Masaru; Kimura, Takaumi

Journal of Chemical Physics, 122(24), p.244507_1 - 244507_5, 2005/06

 Times Cited Count:42 Percentile:81.37(Chemistry, Physical)

We studied the hydration structures of Y$$^{3+}$$ and La$$^{3+}$$ in aqueous solutions by applying the metadynamics method recently introduced as a tool to explore reaction pathways based on the Car-Parrinello molecular dynamics. By employing the metal-water oxygen coordination number as a collective variable of the metadynamics a couple of aqua and chloro-aqua complexes are successfully generated within the time scales of 10 ps. The reconstructed free energy surface captures the characteristics of the hydration of the light and heavy trivalent rare-earth ions. The present study demonstrates that the metadynamics based on the Car-Parrinello molecular dynamics is a promising tool for exploring the free energy surface of complicated systems such as solutions.

Journal Articles

Formation constants of the rare-earth complex species

Inorg.Chem., 3(5), P. 690, 1964/00

no abstracts in English

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