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New Perspectives for the Spent Nuclear Fuel Radionuclides Release Model in a Deep Geological Repository

Published online by Cambridge University Press:  19 October 2011

Christophe Poinssot ,
Cécile FERRY  and
Arnaud POULESQUEN
Christophe Poinssot
Affiliation:
[email protected], CEA - Nuclear Energy Division, Department of Physics and Chemistry, Service for the Studies of the Radionuclides Behaviour, CEA Saclay, BP11, GIF SUR YVETTE, F-91191, France, +33.1.6908.3260, +33.1.6908.5254
Cécile FERRY
Affiliation:
[email protected], CEA, Nuclear Energy Division, Department of Physics & Chemistry, Service for the Studies of the Radionuclides Behaviour, CEA SACLAY, BP.11, GIF SUR YVETTE, F-91650, France
Arnaud POULESQUEN
Affiliation:
[email protected], CEA, Nuclear Energy Division, Department of Physics & Chemistry, Service for the Studies of the Radionuclides Behaviour, CEA SACLAY, BP.11, GIF SUR YVETTE, F-91650, France
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Abstract

Spent Nuclear Fuel (SNF) source terms are used to define the release rate of radionuclides (RN) in a direct disposal and to assess the performance of this waste form. They classically distinguish between two contributions: (i) the Instant Release Fraction (IRF) of RN which are directly leached when water contacts the fuel, (ii) the slow and long term release of RN which are embedded within the fuel matrix. Recent experimental results bring significant input in our understanding and assessment of both contributions. However, they have not yet been integrated in the definition of the SNF source term. This paper will present the impact on the RN source term of the latest results on the SNF long term evolution and the key remaining scientific issues.

Keywords

waste managementactinidegeologic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 985: Symposium NN – Scientific Basis for Nuclear Waste Management XXX , 2006 , 0985-NN02-06
Copyright
Copyright © Materials Research Society 2007

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References

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