Recent Results on the Effect of Gamma Radiation on the Durability and Microstructure of DWPF Glass

by N. E. Bibler, Westinghouse Savannah River Co, United States,
M. H. Tosten, Westinghouse Savannah River Co, United States,
D. C. Beam, Westinghouse Savannah River Co, United States,



Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1990

Abstract:

The effect of gamma radiation on the durability and microstructure of a simulated nuclear waste glass from the Savannah River Site has been carefully investigated. Three large pieces of glass were irradiated with a Co-60 source to three doses up to a maximum dose of 3.1 ? 10⁸ Gray. Internal samples of the large pieces of the irradiated and unirradiated glasses were leached in deionized water to investigate durability changes and were examined by transmission electron microscopy (TEM) to investigate microstructure changes. Leach tests were performed in triplicate at 90?C with crushed glass samples in deionized water. A statistical analysis of the results indicated to the 95% confidence level that the radiation did not affect the glass durability.

Subject Headings: Glass | Radiation | Radioactive wastes | Microstructure | Material durability | Gamma function | Water sampling

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