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.

Language	:	Japanese
Journal	:	2017-Nendo Seika Kokaigata Riyo Seika Hokokusho (Ritsumeikan Daigaku SR Senta)
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Pages	:	p.33 - 36
Publication Year/Month	:	2018/00
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Keywords	:	ガラス固化体; XAFS; 放射光
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Registration No. : AA20170735
JAEA Abstracts No. :
Paper Submission No. : 26680

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