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Leaching Behaviour of Ion-Implanted Simulated Hlw Glasses and Tentative Prediction of their Alpha-Recoil Aging.

Published online by Cambridge University Press:  15 February 2011

J.C. Dran ,
Y. Langevin ,
M. Maurette ,
J.C. Petit  and
B. Vassent
J.C. Dran
Affiliation:
Laboratoire Renè Bernas, B.P. N°1, 91406 Orsay, France.
Y. Langevin
Affiliation:
Laboratoire Renè Bernas, B.P. N°1, 91406 Orsay, France.
M. Maurette
Affiliation:
Laboratoire Renè Bernas, B.P. N°1, 91406 Orsay, France.
J.C. Petit
Affiliation:
Laboratoire Renè Bernas, B.P. N°1, 91406 Orsay, France.
B. Vassent
Affiliation:
Laboratoire Renè Bernas, B.P. N°1, 91406 Orsay, France.
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Abstract

The ion implantation-based simulation of α-recoil aging in radwaste glasses has been applied to several simulated HLW glasses. The results are qualitatively described by a new model of leaching for the implanted glasses although several specific features of irradiated surfaces are not clearly understood. This model suggests that for the most likely case of diffusion-controlled corrosion, where the reaction scheme involves several steps (hydration, dissolution of hydrated silica gel, etc…), the kinetics-controlling one would not necessarily be radiation sensitive. Indeed for these more representative glasses, no evidence for a drastic increase in the dissolution rate of the silica gel, induced by ion implantation has been so far detected, whereas the hydration rate seems in some cases more significantly enhanced. However the implications of these observations for the durability of the glasses remain to be assessed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 6: Symposium D – Scientific Basis for Nuclear Waste Management IV , 1981 , 651
Copyright
Copyright © Materials Research Society 1982

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References

REFERENCES

1 - Dran, J.C., Maurette, M., Petit, J.C., Vassent, B. in : Scientific Basis for Nuclear Waste Management Vol. 3, Moore, J.G. ed. (Plenum Press, New York 1981) pp. 449–456.Google Scholar
2 - Marples, J.A.C., Lutze, W., Sombret, C. in : Radioactive Waste Management and Disposal, Simon, R. and Orlowaki, S. ed. (Harwood Academic Publ. 1980) pp. 307–323.Google Scholar
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8 - Burns, W.G., Hugues, A.E., Marples, J.A.C., Nelson, R.S., Stonchan, A.M., AERE report R 10189 (1981).Google Scholar