Title

Sodium Diffusion and Leaching of Simulated Nuclear Waste Glass

Editor(s)

Shipler, Dillard B.

Abstract

Oxides such as CaO, ZnO, Fe20O3, and Zr0O2 were substituted for Si0O2 into a 14 Na20-10 B20O3-76 Si0O2 (wt%) glass in proportion to their weight percent in PNL-7668 simulated nuclear waste glass. No correlation was found between the Na diffusion coefficient (DNa) in the bulk glass and sodium leaching in water for any of the iron-containing borosilicate glasses. Effective diffusion coefficients calculated from the sodium leach rates in deionized water were 500 to 2000 times larger than DNa. The experimental leaching data agreed with a diffusion-convection model where the convective term was a measured “phase-boundary”velocity moving into the glass.

Department(s)

Mining and Nuclear Engineering

Second Department

Materials Science and Engineering

Keywords and Phrases

Glass - Radiation Effects; Borosilicate Glass; Nuclear Waste Disposal; Radioactive Waste; Radioactive Materials

International Standard Serial Number (ISSN)

27820

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1984 Wiley, All rights reserved.

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