Abstract
Repository-oriented leaching experiments involving Savannah River Laboratory (SRL) 165 type glass under a gamma -radiation field (1 plus or minus 0. 2 multiplied by 10**4 R/H) have been performed by the Nevada Nuclear Waste Storage Investigations project. This communication discusses glass surface analyses obtained by SEM, nuclear resonance profiling, and SIMS together with leachate solution data in relation to a mechanism that couples diffusion, hydrolysis (etching and gelation), and precipitation to qualitatively describe the release of different glass components to the leachant solutions. The release of mobile (e. g. Li) and partly mobile (e. g. B) species is controlled primarily by interdiffusion with water species across the interdiffusion zone. Glass components that are immobile in the interdiffusion zone are released to the solution by etching. For prediction of long-term steady state concentrations of glass components with low solubility, the relative rates of release from the glass and secondary mineral precipitation must be taken into account.
Original language | English (US) |
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Title of host publication | Materials Research Society Symposia Proceedings |
Editors | John K. Bates, Waldemar B. Seefeldt |
Publisher | Materials Research Soc |
Pages | 533-546 |
Number of pages | 14 |
Volume | 84 |
ISBN (Print) | 0931837499 |
State | Published - 1987 |
Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials