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Surface Layer Formation on a Nuclear Waste Glass

Published online by Cambridge University Press:  21 February 2011

Werner Lutze ,
GÜnter Malow ,
Harald Rabe  and
Thomas J. Headley
Werner Lutze
Affiliation:
Hahn-Meitner-Institut für Kernforschung Berlin, Glienicker Strasse 100, D 1000 Berlin 39, Germany,
GÜnter Malow
Affiliation:
Hahn-Meitner-Institut für Kernforschung Berlin, Glienicker Strasse 100, D 1000 Berlin 39, Germany,
Harald Rabe
Affiliation:
Hahn-Meitner-Institut für Kernforschung Berlin, Glienicker Strasse 100, D 1000 Berlin 39, Germany,
Thomas J. Headley
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico, 87185, USA
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Extract

Surface layers are a common feature of leached surfaces of borosilicate waste glasses. Layers are also observed upon weathering of volcanic glasses[l] and of silicate minerals[2]. The question of whether these layers can protect the glass against further attack by decreasing the leach rate is stïll a subject of controversy[3]. Both in geochemical work[4] and in work on waste forms [5,6], surface layers are attributed a protective function, and the stability of leached, million years old volcanic glasses[1] may be due to the presence of palagonite, a thin (≤100 μm) alteration layer, which forms in a few years but does not seem to increase in thickness after this time. The present study investigates the effects of layer formation on leaching kinetics of a borosilicate waste glass containing 20 wt.% LWR-type simulated waste oxides.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 15: Symposium D – Scientific Basis for Nuclear Waste Management VI , 1982 , 37
Copyright
Copyright © Materials Research Society 1983

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References

REFERENCES

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