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Approaches to Long-Term Performance Assessment of Deep Underground Disposal of Radioactive Wastes: A European Perspective

Published online by Cambridge University Press:  01 January 1992

Trevor J. Sumerling  and
David Read
Trevor J. Sumerling
Affiliation:
Safety Assessment Management, 4 Freedom Cottages, South Stoke, Reading RG8 OJD, UK
David Read
Affiliation:
WS Atkins Science and Technology, Woodcote Grove, Epsom, Surrey KT18 5BW, UK
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Abstract

The aim of long-term performance assessment (PA) is generally to develop confidence that the disposal system will perform within certain bounds and give rise to acceptably low impacts or risks. The PA procedure must be able to deal with:

  • - uncertainty due to incomplete understanding of the relevant processes;

  • - uncertainty due to limited sampling of the structures and characteristics of the system and especially the geological media;

  • - uncertainty about future conditions and processes leading to changes in the engineered barriers and natural environment that may affect radionuclide release, transport and exposure pathways.

A number of approaches have been taken to solving the problem of how to deal with such uncertainties. The differences in approach may be due to the stage of project development, differences in national regulatory guidance and the different r6les of the implementor and the regulator. This paper examines the rôles of the implementor and regulator and discusses possible approaches appropriate to both points of view.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 294: Symposium V – Scientific Basis for Nuclear Waste Management XVI , 1992 , 951
Copyright
Copyright © Materials Research Society 1993

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References

REFERENCES

1. NEA, Disposal of Radioactive Waste: Can Long-term Safety be Evaluated? A Collective Opinion of the Radioactive Waste Management Committee OECD Nuclear Energy Agency and the International Radioactive Waste Management Advisory Committee International Atomic Energy Agency, endorsed by the Experts for the Community Plan of Action in the Field of Radioactive Waste Management Commission of the European Communities, published NEA(OECD) Paris, 1991.Google Scholar
2. McCombie, C., The Role of the Repository Implementer in Providing and Demonstrating Safe Disposal of Radioactive Wastes, in High Level Radioactive Waste Management Proc. of the 3rd Ann. Conf., Las Vegas, 1992, Vol.2, pp. 102–105.Google Scholar
3. NEA, Safety Assessment of Radioactive Waste Repositories: Systematic Approaches to Scenario Development. Report of the NEA Working Group on the Identification and Selection of Scenarios for Performance Assessment of Radioactive Waste Disposal, NEA (OECD) Paris, 1992.Google Scholar
4. Cadelli, N. et al. , PAGIS: Performance Assessment of Geological Isolation Systems for Radioactive Waste CEC Nuclear Science and Technology series, CEC EUR 11775 EN, 1988.Google Scholar
5. Thompson, B.G.J., The Time Dimension in Risk Analysis: Examples from Recent Work in the United Kingdom. In Saltelli A. et al (eds.), Risk Analysis in Nuclear Waste Management. 1989, pp. 231–262.Google Scholar
6. Boulton, G.S., Time-dependent Modelling of Environmental Change, pp 363–376; and Ringrose, P.S., et al. , Probabilistic Simulation of the Long-Term Evolution of Radioactive Waste Disposal Sites, pp.427-436, In Safety Assessment of Radioactive Waste Repositories Proc. NEA/IAEA/CEC Symposium, Paris, 1990, NEA(OECD) Paris, 1991.Google Scholar
7. Umeki, H. et al. , Site-Generic Approach for Performance Assessment for HLW Disposal in Japan. In High Level Radioactive Waste Management, Proc. of the 2nd Ann. Conf., Las Vegas, 1991, Vol. 2, pp. 1715–1732.Google Scholar
8. Sumerling, T.J. and Thompson, B.G.J., Application of a Probabilistic System-based Methodology for the Performance Assessment of Deep Underground Disposal of Nuclear Wastes, in High Level Radioactive Waste Management, Proc. of the 3rd Ann. Conf., Las Vegas, 1992, Vol.2, pp. 1647–1657.Google Scholar
9. Sumerling, T.J., (Editor), Dry Run 3: A Trial Assessment of Underground Disposal of Radioactive Wastes. Based on Probabilistic Risk Assessment. UK DoE Report DoE/HMIP/RR/92.039, 1992.Google Scholar
10. Thorne, M.C., Dry Run 3: Volume 8: Uncertainty and Bias Audit. UK DoE Report DoE/HMIP/RR/92.040, 1992.Google Scholar
11. McCombie, C., McKinley, I.G. and Zuidema, P., Sufficient Validation: The Value of Robustness in Performance Assessment and System Design. In GEOVAL-1990. Symposium on Validation of Geosphere Flow and Transport Models, OECD Paris 1991, pp. 598–610.Google Scholar
12. NAGRA, Project GewAhr 1985: Nuclear Waste Management in Switzerland: Feasibility Studies and Safety Analyses. Vol. 1–, Vol. 9 (English Summary), Nagra Gewdihr Report Series, NGB 85–01/09, June 1985.Google Scholar
13. McKinley, I.G., Smith, P.A. and Curti, E., Can the Kristallin I Near-field Model be Considered Robust ?, in High Level Radioactive Waste Management, Proc. of the 3rd Ann. Conf., Las Vegas, 1992, Vol.2, pp. 1770–1776.Google Scholar