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Report No.

Local structure analysis of light elements included in simulated radioactive waste glasses by soft X-ray absorption fine structure

Okamoto, Yoshihiro  ; Nagai, Takayuki  ; Kaneko, Koji   ; Motokawa, Ryuhei   ; Haga, Yoshinori   ; Yamanaka, Keisuke*; Ota, Toshiaki*

The high-level radioactive waste solution which generated from a spent nuclear fuel reprocessing process are mixed with a borosilicate glass frit in a vitrification process, and a chemical stable glass solidified body is produced. To understand local structure of light elements included in a glass solidified body, we carried out a B K-edge XANES measurement of raw glass frits and simulated radioactive waste glasses. As a result of this estimation of boron local structure in glass samples, it was found that the sp$$^{3}$$ type boron (BO$$_{4}$$) percentage increases and the sp$$^{2}$$ type (BO$$_{3}$$) percentage by increasing the sodium content in glass frits.



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