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Transport from the Canister to the Biosphere: Using anIntegrated Near-and Far-Field Model

Published online by Cambridge University Press:  03 September 2012

B. Gylling ,
L. Romero ,
L. Moreno  and
I. Neretnieks
B. Gylling
Affiliation:
Department of Chemical Engineering and Technology, Royal Institute of Technology, Stockholm, Sweden
L. Romero
Affiliation:
Department of Chemical Engineering and Technology, Royal Institute of Technology, Stockholm, Sweden
L. Moreno
Affiliation:
Department of Chemical Engineering and Technology, Royal Institute of Technology, Stockholm, Sweden
I. Neretnieks
Affiliation:
Department of Chemical Engineering and Technology, Royal Institute of Technology, Stockholm, Sweden
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Abstract

A coupled model concept which may be used for performance assessment of anuclear repository is presented. The tool is developed by integration of twomodels, one near field and one far field model. A compartment model,NUCTRAN, is used to calculate the near field release from a damagedcanister. The far field transport through fractured rock is simulated byusing CHAN3D, based on a three-dimensional stochastic channel networkconcept. The near field release depends on the local hydraulic properties ofthe far field. The transport in the far field in turn depends on where thedamaged canister(s) is located. The very large heterogeneities in the rockmass makes it necessary to study both the near field release properties andthe location of release at the same time. In order to demonstrate thecapabilities of the coupled model concept it is applied on a hypotheticalrepository located at the Hard Rock Laboratory in Äspö, Sweden. Two mainitems were studied; the location of a damaged canister in relation tofracture zones and the barrier function of the host rock. In the study ofthe near field rock as a transport barrier the effect of different tunnelexcavation methods which may influence the damage level of the rock aroundthe tunnel was addressed.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 465: Symposium II – Scienfific Basis for Nuclear Waste Management XX , 1996 , 1037
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

1. Romero, L., Moreno, L., and Neretnieks, I., Fast multiple path model to calculate radionuclide release from the near filed of a repository, Nuclear Technology, Vol. 112, 1 pp 89–98, (1995).Google Scholar
2. Romero, L., Moreno, L., and Neretnieks, I., The fast multiple path model “Nuctran” -Calculating the radionuclide release from a repository, Nuclear Technology, Vol. 112, 1 pp 99–107, (1995).Google Scholar
3. Moreno, L. and Neretnieks, I., Fluid flow and solute transport in a network of channels, J. of Contaminant Hydrology, 14, pp 163–192, (1993).Google Scholar
4. Munier, R. and Sandstedt, H., SR-95: Hypothetical layout using site data from Äspö, Swedish Nuclear Fuel and Waste Management Co., SKB Progress Report 94–53, Stockholm, (1994).Google Scholar
5. Narasimhan, T. N., and Witherspoon, P. A., An integrated finite difference method for analyzing fluid flow in porous media, Water Resour. Res., 12, 57, (1976).Google Scholar
6. Robinson, P.C., Connectivity, flow and transport in network models of fractured media, Ph. D. Thesis, St. Catherine's College, Oxford University, Ref. TP 1072, (May 1984).Google Scholar
7. Moreno, L., Tsang, Y.W., Tsang, C.F., Hale, F.V., and Neretnieks, I.. Flow and tracer transport in a single fracture. A stochastic model and its relation to some field observations, Water Resour. Res., 24, pp 2033–3048, (1988).Google Scholar
8. Moreno, L., Gylling, B., and Neretnieks, I.. Solute transport in fractured media - the important mechanisms for performance assessment, In print, J. of Contaminant Hydrology, (1996).Google Scholar
9. Boghammar, A., Kemakta Konsult AB, Sweden, (private communication).Google Scholar