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Long-Term Behavior of Bituminized Waste: Modelling of Auto-Irradiation and Leaching

Published online by Cambridge University Press:  21 March 2011

P. Chaix ,
S. Camaro ,
B. Simondi ,
P.P. Vistoli  and
V. Blanc
P. Chaix
Affiliation:
CEA Centre d'Etudes de Saclay, BP11, 91191 Gif sur Yvette cedex, France
S. Camaro
Affiliation:
CEA Centre d'Etudes de Cadarache, 13108 St Paul les Durance, France
B. Simondi
Affiliation:
CEA Centre d'Etudes de Cadarache, 13108 St Paul les Durance, France
P.P. Vistoli
Affiliation:
CEA Centre d'Etudes de Cadarache, 13108 St Paul les Durance, France
V. Blanc
Affiliation:
Cogema, 1 rue des hérons, 78182 St Quentin en Yvelines cedex, France
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Abstract

During interim storage, the main evolution factor of the bituminized wastes is radiolysis under auto-irradiation, while in deep disposal conditions, after radioactive decrease, site resaturation with water, and container corrosion, the main factor of evolution is leaching by water.

This paper presents two models, designed to describe respectively radiolytic gas evacuation, and bituminized waste alteration under leaching.

The first model is based on the integration of simple descriptions of gas production by radiolysis, gas diffusive transport, bubble nucleation and ripening, and bubble transport under buoyancy and viscosity.

The second model is based on simple descriptions of water adsorption and solubilization at the surface, water diffusion into the matrix, water uptake by the most soluble salts, salt grain swelling and alteration of matrix waterproofing, diffusive transport of salts out of the waste.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 663: Symposium – Scientific Basis for Nuclear Waste management XXIV , 2000 , 131
Copyright
Copyright © Materials Research Society 2001

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References

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