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Borosilicate Nuclear Waste Glass Alteration Kinetics: Chemical Inhibition and Affinity Control

Published online by Cambridge University Press:  10 February 2011

T. Advocat ,
J. L. Chouchan ,
J. L. Crovisier ,
C. Guy ,
V. Daux ,
C. Jegou ,
S. Gin  and
E. Vernaz
T. Advocat
Affiliation:
Commissariat á l'Energie Atomique (CEA), Centre d'Etude de la Vallée du Rhône, Drrv/Scd, Laboratoire d'Etude de l'Altgrabiliti des Matdriaux, BP 171, 30207 Bagnols-sur-Céze, France
J. L. Chouchan
Affiliation:
Commissariat á l'Energie Atomique (CEA), Centre d'Etude de la Vallée du Rhône, Drrv/Scd, Laboratoire d'Etude de l'Altgrabiliti des Matdriaux, BP 171, 30207 Bagnols-sur-Céze, France
J. L. Crovisier
Affiliation:
CNRS-Centre de Geochimie de la Surface, 1 rue blessig 67084 Strasbourg Cedex, France
C. Guy
Affiliation:
Commissariat á l'Energie Atomique (CEA), DAM-LDG, Bruyères Le Chatêl, France
V. Daux
Affiliation:
Commissariat á l'Energie Atomique (CEA), DAM-LDG, Bruyères Le Chatêl, France
C. Jegou
Affiliation:
Commissariat á l'Energie Atomique (CEA), Centre d'Etude de la Vallée du Rhône, Drrv/Scd, Laboratoire d'Etude de l'Altgrabiliti des Matdriaux, BP 171, 30207 Bagnols-sur-Céze, France
S. Gin
Affiliation:
Commissariat á l'Energie Atomique (CEA), Centre d'Etude de la Vallée du Rhône, Drrv/Scd, Laboratoire d'Etude de l'Altgrabiliti des Matdriaux, BP 171, 30207 Bagnols-sur-Céze, France
E. Vernaz
Affiliation:
Commissariat á l'Energie Atomique (CEA), Centre d'Etude de la Vallée du Rhône, Drrv/Scd, Laboratoire d'Etude de l'Altgrabiliti des Matdriaux, BP 171, 30207 Bagnols-sur-Céze, France
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Abstract

The objective of this work was to develop a more representative mathematical formulation of the alteration kinetics of the borosilicate SON68 glass by combining three approaches: (1) Compare extensive prior experimental static leaching results for SON68 glass with the first-order kinetic law in which silica is the predominant element, (2) Assess the exact role of dissolved silica on the alteration rate under conditions near and far from saturation, by means of dynamic leach tests and, (3) Compare the new data with the general kinetic law for silicates in which the reaction affinity, catalysis and inhibition are the three influencing factors.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 506: Symposium – Scientific Basis for Nuclear Waste Management XXI , 1997 , 63
Copyright
Copyright © Materials Research Society 1998

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References

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