Irradiation stability of R7T7-type borosilicate glass

Effect of alpha radiation on the leaching behaviour of nuclear glass

“…• Curium doped glasses with 0.04, 0.40, 1.20 and 3.25 wt% 244 CmO 2 were prepared by melting between 2001 and 2004 in the CEA's Atalante-DHA facility at Marcoule [12] to simulate the alpha decay dose sustained by an industrial glass under disposal conditions. To date these glasses have simulated an alpha decay dose corresponding to around 20 000 years of storage ( Fig.…”

Effect of chemical composition on borosilicate glass behavior under irradiation

“…Depending on their chemical composition, nuclear glasses may be subject to volume expansion or densification; variations are also observed in their mechanical properties for alpha decay doses up to about 2 Â 10 18 a/g, followed by a stabilization state that has been many time demonstrated up to 6 Â 10 18 a/g. Although recent studies suggest that nuclear interactions with alpha decay recoil nuclei are most likely responsible for these changes in the behavior of R7T7-type French nuclear glass [4,5], the structural origin of these modifications and their stabilization have not been clearly established. The chemical complexity of these systems (almost 30 oxides [6]) and the radioactivity of the principal materials used to investigate the effect of alpha decay (actinide-doped glass specimens) make it difficult to carry out and interpret structural studies.…”

Mineral-Aqueous Solution Interfaces and Their Impact on the Environment

“…Radiation effects influence physical and structural properties of glasses (Weber et al, 1997) . However, the accumulation of alpha decays does not increase the initial alteration rate in glasses containing actinides (Np, Pu, Am, Cm) up to an integrated dose of 4x10 18 ag -1 (Wellman et al, 2005;Peuget et al ., 2006) .…”