Solubility of uranyl nitrate precipitates with -Alkyl-2-pyrrolidone derivatives (Alkyl = -propyl, -butyl, -butyl, and cyclohexyl)

Takao, Koichiro*; Noda, Kyoko*; Nogami, Masanobu*; Sugiyama, Yuichi*; Harada, Masayuki*; Morita, Yasuji ; Nishimura, Kenji*; Ikeda, Yasuhisa*

We have been developing an advanced reprocessing system for spent FBR fuels based on precipitation method using pyrrolidone derivatives. In the present study, the solubility of UO $_{2}$ (NO $_{3}$ ) $_{2}$ (NRP) $_{2}$ (NRP = -alkyl-2-pyrrolidone, alkyl = -propyl, -butyl, -butyl and cyclohexyl) in aqueous solutions with HNO $_{3}$ has been examined. As a result, the solubility of each species of UO $_{2}$ (NO $_{3}$ ) $_{2}$ (NRP) $_{2}$ generally decreases with increasing concentrations of HNO $_{3}$ and NRP ((HNO $_{3}$ ) and (NRP), respectively). The solubility of UO $_{2}$ (NO $_{3}$ ) $_{2}$ (NRP) $_{2}$ also depends on the type of NRP; a higher hydrophobicity of NRP generally leads to a lower solubility of UO $_{2}$ (NO $_{3}$ ) $_{2}$ (NRP) $_{2}$ . The logarithms of effective solubility products ( $_{rm eff}$ ) of UO $_{2}$ (NO $_{3}$ ) $_{2}$ (NRP) $_{2}$ at different (HNO $_{3}$ ) values and 293 K were evaluated.

Language	:	English
Journal	:	Journal of Nuclear Science and Technology
Volume	:	46
Number	:	10
Pages	:	p.995 - 999
Publication Year/Month	:	2009/10
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Paper URL	:	https://doi.org/10.3327/jnst.46.995
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Keywords	:	no keyword
Research Facility	:	BECKY(バックエンド研究施設)
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Article of JAEA R&D Review	:
Cooperating Institute	:	東京工業大学(文部科学省)

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Registration No. : AA20090538
JAEA Abstracts No. : 37001488
Paper Submission No. : 6487

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