Leach testing at 50°C of α-doped SON68 glass alteration gels

Irradiation Impact on the Leaching Behavior of HLW Glasses

“…The use of radionuclide-doped glasses also allows to understand the radionuclide behavior during the glass leaching and to assess the retention properties of the alteration products [Rolland et al (2013)] [Advocat et al (2001)] [Jollivet et al (2005)]. Finally, doped glass leaching experiments can also be carried out under realistic disposal conditions [Valcke et al (2006)].…”

Dissolution mechanism of the SON68 reference nuclear waste glass: New data in dynamic system in silica saturation conditions

“…The data also show that in flowing water the square root time dependence for glass dissolution under silica saturated conditions might become modified to an inverse time rate law if Si saturation concentrations decrease with time. Another advantage of performing flow-through experiments such as these is that residual rate bounding values in literature were up to now only constrained by static experiments where the high concentrations achieved by tracer elements in those experiments limit precision [22,24,25]. The flow-through approach thus provides a more sensitive alternative for residual rate value assessment.…”

Long-term aqueous alteration kinetics of an alpha-doped SON68 borosilicate glass

“…Moreover, the behavior of the actinides such as Pu and Np, which will account for most of the radioactivity of the glass package after the first 1000 years, must be known to assess the long-term safety of a repository site. Although the model currently used to assess the longterm safety of a deep geological repository assumes that radionuclides are released into solution at the same rate as the glass matrix, experimental data suggest that actinide release rates are orders of magnitude lower than the glass corrosion rate [4][5][6].…”