Speaker
Description
Alkali-borosilicate glasses (ABS) are used to accommodate wastes arising from day to day operations and the decommissioning of nuclear installations. Investigating the immobilization systems, chemical durability and structure under normal conditions have gradually increased and in the next two decades will become the prime focus. In this study some physical properties such as Dietzel field strength are measured for three Alkali-borosilicate glasses (ABS-waste) in the viewpoint of applicability to the waste form. Chemical durability was evaluated for three Alkali-borosilicate glasses (ABS-waste) by immersed in hydrogen peroxide. By applying a modular approach, the disposal system is divided into near- and far-field subsystems that are subsequently divided into engineering barriers and the dynamic nature of hydrological and biological subsystems in the host environment. The Dietzel field strength amplitude varies within a relatively broad range of 1.2 to 0.1 and is indicative of the magnitude of the electrostatic attraction force between element and oxygen. The ordered sequence of oxides is relatively convincing in the range of A 1 ˃ 1. Results indicate that oxides form the glass network have A ˂0.35, as these oxides (alkali in particular) are known to modify network. Between these two extreme behaviors, intermediate oxides may show both behaviors according to glass composition. Dietzel approach suggests that both smallness and high charge of the cations favor the formation of glassy oxides.
| Speaker's title | Mr |
|---|---|
| Affiliation | Reactors Department, Nuclear Research Center, Egyptian Atomic Energy Authority |
