Electronic absorption spectra of U $^{3+}$ and U $^{4+}$ in molten LiCl-RbCl eutectic

Nagai, Takayuki ; Uehara, Akihiro*; Fujii, Toshiyuki*; Sato, Nobuaki*; Yamana, Hajimu*

The binary alkali chloride mixture with the lowest melting point is the LiCl-RbCl eutectic. If pyro-reprocessing process methods can be operated in this LiCl-RbCl eutectic, it means they could be operated at lower temperature. We have confirmed the possibility of the LiCl-RbCl eutectic by measuring the formal redox potentials of the U $^{4+}$ /U $^{3+}$ and U $^{3+}$ /U couples in molten LiCl-RbCl eutectic. In the present study, electronic absorption spectra of U $^{3+}$ and U $^{4+}$ in molten LiCl-RbCl eutectic at various temperatures were measured by the UV/Vis/NIR spectrophotometry and the observed absorption bands were analyzed.

Language	:	English
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Meeting title	:	International Conference on Actinides 2009
Held date	:	2009/07
Location (city)	:	San Francisco
Location (country)	:	U.S.A.
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Keywords	:	no keyword
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Cooperating Institute	:	京都大学原子炉実験所

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Registration No. : BB20090016
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Electronic absorption spectra of U and U in molten LiCl-RbCl eutectic

Electronic absorption spectra of U $^{3+}$ and U $^{4+}$ in molten LiCl-RbCl eutectic