2010 Fiscal Year Final Research Report
Spectroscopic study of neptunium complexation in hydrate melts
| Project/Area Number |
20760594
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Nuclear engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
FUJII Toshiyuki Kyoto University, 原子炉実験所, 准教授 (10314296)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 燃料サイクル |
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| Research Abstract |
Neptunium species in calcium nitrate hydrate melts were analyzed by Raman spectrometry and UV/Vis/NIR spectrometry. Major fraction was assigned to be NpO_2^<2+> of Np(VI) and small fraction to be NpO_2^+ of Np(V). A shift of the v1 symmetric vibrational frequency of NpO_2^<2+> in nitrate media was found in Raman spectra. This suggests a coordination circumstance change of NpO_2^<2+>.
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