A complete understanding of radioactive waste glass interactions with near-field materials is essential for appropriate nuclear waste repository performance assessment. In many geologic repository designs, Fe is present in both the natural environment and in the containers that will hold the waste glasses. In this paper we discuss investigations into the alteration of International Simple Glass (ISG) in the presence of Fe0 foil and hematite (Fe2O3). ISG alteration is more pronounced in the presence of Fe0 than with hematite. Additionally, minimal glass corrosion is observed for distances equal to 5 mm between Fe materials and ISG, but substantial glass corrosion is observed for systems exhibiting full contact between Fe0 material and ISG. Diatomaceous earth appears to be a better corrosion suppressant than silica when present with iron and ISG.
Revised: May 24, 2016 |
Published: July 16, 2015
Citation
Reiser J.T., L. Neill, J.L. Weaver, B. Parruzot, C. Musa, J.J. Neeway, and J.V. Ryan, et al. 2015.Glass corrosion in the presence of iron-bearing materials and potential corrosion suppressors. In Scientific Basis for Nuclear Waste Management XXXVIII. MRS Proceedings, edited by S Gin, R Jubin, J Matyas and E Vance, 1744, 139-144. Cambridge:Materials Research Society.PNNL-SA-108398.doi:10.1557/opl.2015.503