Evaluation of HLW glass dissolution/alteration kinetics by using micro-reactor flow-through test method; Initial glass dissolution rate as a function of pH and temperature

Sakatani, Keiichi*; Inagaki, Yaohiro*; Makigaki, Hikaru; Idemitsu, Kazuya*; Arima, Tatsumi*; Mitsui, Seiichiro  ; Noshita, Kenji*

A new type of flow-through test method using micro-reactor was developed and applied to measurement of dissolution kinetics for a Japanese simulated HLW glass, P0798. By using this method we measured the initial dissolution rate as a function of pH and temperature. The results showed that the initial dissolution rate has "V-shaped" pH dependence at any temperature and Arrhenius-type temperature dependence. Furthermore, consistency of glass dissolution amount between solid and solution analyses demonstrates the reliability of this test method.