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Release of Radionuclides from Spent Fuel Under Repository Conditions: Mathematical Modelling and Preliminary Results

Published online by Cambridge University Press:  21 March 2011

Esther Cera ,
Juan Merino  and
Jordi Bruno
Esther Cera
Affiliation:
EnvirosQuantiSci (Spain), Parc Tecnològic del Vallàs, 08290 Cerdanyola (Spain)
Juan Merino
Affiliation:
EnvirosQuantiSci (Spain), Parc Tecnològic del Vallàs, 08290 Cerdanyola (Spain)
Jordi Bruno
Affiliation:
EnvirosQuantiSci (Spain), Parc Tecnològic del Vallàs, 08290 Cerdanyola (Spain) Email:jbruno@quantisci.es
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Abstract

In the framework of the Enresa 2000 PA exercise and as a continuation of the developments made during SR 97, we have developed a conceptual and numerical model to calculate the release of radionuclides from spent fuel under repository conditions. The model includes both thermodynamic and kinetic considerations. Hence, although certain radionuclides are solubility controlled, for other radionuclides their release is governed by kinetic processes such as radiolytically promoted oxidative dissolution of the matrix and the associated water turnover inthe gap. The fluxes of selected radionuclides are calculated as an indication of the relative importance of the various processes considered to define source term concentrations in the performance assessment of the spent fuel repository.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 663: Symposium – Scientific Basis for Nuclear Waste management XXIV , 2000 , 459
Copyright
Copyright © Materials Research Society 2001

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References

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