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Synchrotron radiation based XAFS analysis of developed simulation samples of nuclear waste glass

Okamoto, Yoshihiro  ; Nagai, Takayuki  ; Kobayashi, Hidekazu ; Oyama, Koichi ; Sasage, Kenichi; Shiwaku, Hideaki   ; Inose, Takehiko*; Sato, Seiichi*

The local structures around some elements in newly developed nuclear waste glass simulation samples using phosphorus-doped borosilicate glass and iron phosphate glass as frit were investigated by synchrotron radiation based XAFS analysis. It was found that the addition of phosphorus to borosilicate glass changes the glass to a significant reduction state and counteract oxidation effects induced by increasing waste loading. In iron phosphate glass with a composition of 30% Fe$$_2$$O$$_3$$-P$$_2$$O$$_5$$, the XAFS analysis results showed that the solubility of ruthenium could reach 0.5-1.0%.

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