• help
  • PC | SP
  • JP | EN
          
Refine your search：     
Report No.
 - 
Clear All
Return to the previous page

Redox equilibria of Pu$$^{4+}$$/Pu$$^{3+}$$ and PuO$$_{2}$$$$^{2+}$$/Pu$$^{4+}$$ couples in molten NaCl-CsCl eutectic as measured by absorption spectrophotometry

Nagai, Takayuki  ; Uehara, Akihiro*; Fujii, Toshiyuki*; Shirai, Osamu*; Myochin, Munetaka; Yamana, Hajimu*

Redox behavior of uranium and plutonium in molten salts is the essential information for establishing an effective reprocessing process with spent MOX fuel. In an oxide electro-winning reprocessing process, the spent nuclear fuel is dissolved into the molten NaCl-CsCl eutectic, and the dissolved U(VI) and Pu(VI) species are reduced to be dioxides by electrolysis. In the present study, formal redox potentials of the Pu$$^{4+}$$/Pu$$^{3+}$$ and PuO$$_{2}$$$$^{2+}$$/Pu$$^{4+}$$ couples in the molten NaCl-CsCl eutectic at 923 K were determined. The fractions of Pu$$^{3+}$$, Pu$$^{4+}$$, and PuO$$_{2}$$$$^{2+}$$ were determined by UV/Vis/NIR absorption spectrophotometry. PuO$$_{2}$$ was dissolved into the molten NaCl-CsCl eutectic by Cl$$_{2}$$$$_{2}$$ gas purging. Valences of plutonium (Pu$$^{0}$$, Pu$$^{3+}$$, Pu$$^{4+}$$, and PuO$$_{2}$$$$^{2+}$$) were controlled by changing the flow rates of Cl$$_{2}$$, O$$_{2}$$, and Ar gases.

Language

 :

English

Journal

 :

Radiochimica Acta

Volume

 :

97

Number

 :

4-5

Pages

 :

p.209 - 212

Publication Year/Month

 :

2009/05

Meeting title

 :

Plutonium Futures; The Science 2008

Held date

 :

2008/07

Location (city)

 :

Dijon

Location (country)

 :

France

Patent information

 :

PDF

 :


Paper URL

 :

https://doi.org/10.1524/ract.2009.1596

DOI for research data

 :

Keywords

 :

no keyword

Research Facility

 :

Press Release

 :

Article of JAEA R&D Review

 :

Cooperating Institute

 :

京都大学原子炉実験所

Accesses

 :

- Accesses

InCites™

 :

Percentile:24.52

Category:Chemistry, Inorganic & Nuclear

Altmetrics

 :

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.

Return to the previous page