Benchmarking as Key Element of Confidence Building in Safety Assessments for Radioactive Waste Disposal

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Abstract

In safety cases for disposal of radioactive waste, currently in development in several countries worldwide, verification of the codes applied for assessment of the long-term repository safety is typically one of the quality assurance requirements demanded by regulatory bodies. Code verification can be done by performing benchmark calculations between two numerical codes. In this paper, an internationally organized benchmark exercise is presented, in which the intercomparison was carried out for a selection of key radionuclides, among which an actinide chain. Besides a strict comparison of the calculated output, both applied codes were evaluated on the feasibility of implementation of processes, especially focusing on realism in the source term formulation. The examples presented in this paper show that COMSOL Multiphysics can be a valuable complementary modelling tool, adequately representing most of the processes of importance in a radioactive waste repository, for varying and even extreme timescales.

Details

Original languageEnglish
Title of host publicationCOMSOL Conference Hannover 2008 Proceedings
Place of PublicationHannover, Germany
Pages1-7
Publication statusPublished - Nov 2008
EventCOMSOL Conference 2008 4th annual conference on multiphysics simulation. - COMSOL, Hannover, Germany
Duration: 4 Nov 20086 Nov 2008

Conference

ConferenceCOMSOL Conference 2008 4th annual conference on multiphysics simulation.
CountryGermany
CityHannover
Period2008-11-042008-11-06

Keywords

  • Radioactive waste disposal, vitrified high-level radioactive waste, safety assessment, code verification, benchmark

ID: 188322