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Title: Glass corrosion in the presence of iron-bearing materials and potential corrosion suppressors

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.
Authors:
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Publication Date:
OSTI Identifier:
1254607
Report Number(s):
PNNL-SA-108398
WN0219080
DOE Contract Number:
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: Scientific Basis for Nuclear Waste Management XXXVIII. MRS Proceedings, 1744:139-144
Publisher:
S Gin, R Jubin, J Matyas and E Vance; Materials Research Society, Cambridge, United Kingdom.
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
HLW glass; near-field effects; glass corrosion