Synchrotron radiation based XAFS research for advancement of the vitrification technology

Okamoto, Yoshihiro  ; Nagai, Takayuki  ; Kobayashi, Hidekazu ; Shiwaku, Hideaki   ; Ayame, Yasuo

The synchrotron radiation based XAFS technique, in which atomic element selectivity and adaptation to a diluted component can be achieved, has been used widely for research work on the nuclear waste vitrification technology. We have used the XAFS technique for many kinds of simulated glass samples. The use of XAFS technique is very effective since many kinds of elements are contained in the nuclear waste glass. In addition, imaging XAFS technique was introduced, since some elements such as platinum group metals in the glass are not distributed uniformly. In this presentation, we summarize some results obtained from the XAFS and imaging XAFS analyses we have performed for advancement of the vitrification technology.