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A Parametric Study of a Repository Tunnel for Decommissioning Waste

Published online by Cambridge University Press:  01 February 2011

António C. Pereira ,
Benny Sundström  and
Robert L. Broed
António C. Pereira
Affiliation:
Department of Physics, Stockholm University, 106 91 Stockholm, Sweden
Benny Sundström
Affiliation:
Swedish Nuclear Power Inspectorate, 106 58 Stockholm, Sweden
Robert L. Broed
Affiliation:
Department of Physics, Stockholm University, 106 91 Stockholm, Sweden
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Abstract

The development of a radionuclide transport model for a tunnel of a repository for short-lived low and intermediate level waste is presented in this work. The model is two-dimensional and uses the finite element method to describe a cross-section perpendicular to the tunnel's main axis. It is shown that the use of a realistic geometry of the system, albeit in 2D, results in a transparent model that can handle the equations in a flexible way. The geometry can easily be changed and also extended to a 3D representation without affecting the numerical code. The disadvantage is the computational requirement. It is expected however that radionuclide transport modelling will evolve to 2D or 3D representations that are more realistic and transparent than today's 1D analytical models which involve many simplifications whose impact on the output is difficult to evaluate.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 807: Symposium Scientific Basis for Nuclear Waste Management XXVII , 2003 , 911
Copyright
Copyright © Materials Research Society 2004

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References

REFERENCES

1. SKB, Deep repository for long-lived low- and intermediate-level waste. Preliminary safety assessment, report TR-99–28, December 1999, Stockholm, Sweden.Google Scholar
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3. Pereira, A. and Sundström, B. Near-field calculations of radionuclide releases from the SFL3–5 repository (in draft), Swedish Nuclear Power Inspectorate, 2003, Stockholm, Sweden.Google Scholar