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Effect of Platinoids on French LWR Reference Glass Properties

Published online by Cambridge University Press:  25 February 2011

F. Pacaud ,
C. Fillet  and
N. Jacquet-Francillon
F. Pacaud
Affiliation:
Rhône Valley Nuclear Research Center, DPR/SCD, BP 171, F 30205 Bagnols-sur-Cèze, France
C. Fillet
Affiliation:
Rhône Valley Nuclear Research Center, DPR/SCD, BP 171, F 30205 Bagnols-sur-Cèze, France
N. Jacquet-Francillon
Affiliation:
Rhône Valley Nuclear Research Center, DPR/SCD, BP 171, F 30205 Bagnols-sur-Cèze, France
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Abstract

Nine samples of the “R7T7” glass composition selected to vitrify fission product solutions in France were prepared with added platinoid elements (ruthenium, rhoditun and palladium) in soluble form and as insoluble metal particles in solution, and their major properties were measured. Regardless of the initial form when added to the glass the platinoids always formed the same heterogeneous inclusions in the final glass: RuO2 precipitates which were often found as aggregates, and polymetallic (Pd, Rh & Te) inclusions.

The particles tended to settle in the molten glass. The viscosity increased by about 20% at 1100°C. The mechanical properties and short-term leach rates were not significantly affected. Crystallization increased by a factor of 2 or 3 in heat-treated glass specimens but did not exceed a few volume percent. However, as the short-term leach rate did not significantly increase, the glass properties were very satisfactory.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 257: Symposium – Scientific Basis for Nuclear Waste Management XV , 1991 , 161
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

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