[2C15-20] Migration/Sorption2

[2C16] Study for improvement in reliability of performance assessment of vitrified waste in geological disposal

(2) Evaluation of dissolution rate for simulated waste glass P0798 : Effect of solution concentration of Si and pH

*Ritsuki Egami¹, Yaohiro Inagaki¹, Noriyuki Yokoyama¹, Toshihiro Kimachi¹, Tatsumi Arima¹, Kazuya Idemitsu¹, Ryuta Matsubara² (1. Kyushu Univ., 2. NUMO)

Keywords:nuclear waste glass, dissolution rate, solution concentration of Si, Si isotopes, MCFT test

Dissolution rate of nuclear waste glass changes complicatedly depending on various environmental parameters (solution composition, pH, temperature, reaction progress, et.al.). In this study, we measured and evaluated the dissolution rate for Japanese reference waste glass P0798 as a function of solution concentration of Si and pH by using a MCFT test method with Si-29 enriched silica solution.