Fig. 8: ISG dissolution under the initial and residual regime.
From: Forty years of durability assessment of nuclear waste glass by standard methods
a Normalised mass loss of boron for test conducted on ISG in ultra-pure water at 25 °C. Black squares = PCT test unstirred, SA/V ratio 2000 m−1, red circles = PCT stirred test SA/V ratio 2000 m−1 and blue triangles = EPA 1313 test, end over end tumbled, SA/V ratio 2000 m−1. Errors bars are the standard deviation of duplicate analysis. b Normalised release rate of boron (g m−2 d−1) from ISG measured by static PCT-B type test at 50 °C at the natural system pH of ~9.3 over timescales of 90–454 days83 and the forward rate at pH 9.0 measured at 50 °C71. Release rates are plotted at the midpoint of the timeframe indicated by the corresponding horizontal line.
