|About this Abstract
||Materials Science & Technology 2019
||Materials Issues in Nuclear Waste Management
||Investigations into Physical and Chemical Characteristics of Nuclear Waste Glass Alteration Layers
||Joelle T. Reiser, Joseph Ryan, Benjamin Parruzot
|On-Site Speaker (Planned)
||Joelle T. Reiser
Understanding alteration mechanisms of borosilicate glasses in aqueous media is essential to nuclear waste performance assessments to ensure radioisotopes are contained for extended periods of time. When exposed to aqueous solutions, borosilicate glass releases various ions into solution and alteration products (or alteration layers) are formed at the surface of glasses. The physical properties of these alteration layers need to be investigated further to advance the understanding of their impacts on overall glass alteration. Experiments are being conducted at Pacific Northwest National Laboratory to investigate the effects of various variables (i.e. pH, glass composition, solution composition, etc.) on the physical and chemical properties (i.e. pore fraction, composition, structural morphology) of the glass alteration layers. Progress of these experiments will be reported in this work.