TY - GEN
T1 - TRANSPORT AND REACTION KINETICS AT THE GLASS:SOLUTION INTERFACE REGION
T2 - RESULTS OF REPOSITORY-ORIENTED LEACHING EXPERIMENTS.
AU - Abrajano, Teofilo A.
AU - Bates, John K.
PY - 1987
Y1 - 1987
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0023545784&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0023545784
SN - 0931837499
T3 - Materials Research Society Symposia Proceedings
SP - 533
EP - 546
BT - Materials Research Society Symposia Proceedings
A2 - Bates, John K.
A2 - Seefeldt, Waldemar B.
PB - Materials Research Soc
ER -