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Research Needs in HLW Disposal Programmes

Published online by Cambridge University Press:  01 January 1992

Joerg Hadermann  and
Charles Mccombie
Joerg Hadermann
Affiliation:
Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
Charles Mccombie
Affiliation:
National Cooperative for the Disposal of Radioactive Waste, CH-5430 Wettingen, Switzerland
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Abstract

A repository for high-level radioactive waste (HLW) will not be in operation in Switzerland (or elsewhere) before the turn of the century. However, extensive investigations for disposal in specific regions or sites are ongoing and formal safety analyses have been performed in many countries. Broadly speaking, these analyses show the feasibility of the chosen options for deep geological disposal. At the present stage, before a licensing application, performance assessments have another important application: to identify further needs to improve system understanding, and to guide the necessary research activities. Performance assessments are thus indispensable tools for focussing in on research requirements and discriminating between necessary, and merely desirable or interesting, research projects.

Based on experience from assessments of HLW disposal in the crystalline of Northern Switzerland (Project Gewähr, KRISTALLIN-I) we consider in detail the chain of models resulting from a scenario analysis. For each model block (e.g., engineered barrier performance, hydrology, radionuclide transport), the adequacy of understanding is addressed and the necessary research needs pointed out. These needs cover a wide span, from a requirement for more reliable input numbers (example: long-term corrosion rate of glass) to a better understanding of important features (example: excavation-damaged-zone) and key mechanisms (example: sorption).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 294: Symposium V – Scientific Basis for Nuclear Waste Management XVI , 1992 , 707
Copyright
Copyright © Materials Research Society 1993

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References

REFERENCES

1. McCombie, C. and Zuidema, P., “Application of Performance Assessment as a Tool for Guiding Project Work"; Intern. Conf. High-Level Radioactive Waste Management, Las Vegas, NV, 1992, pp. 2126–2135.Google Scholar
2. Hadermann, J., McCombie, C., McKinley, I.G. and Zuidema, P., “Safety assessment of HLW disposal in Switzerland: Lessons learned”, in Safety Assessment of Raglactive Waste Repositories (OECD, Paris, 1990), pp. 201–210.Google Scholar
3. Nagra, “Project Gewdhr 1985”, NGB 85–09, Baden, Switzerland, 1985.Google Scholar
4. Thury, M. et al. , “Geology and hydrogeology of the crystalline basement of Northern Switzerland”, Nagra NTB 93–01, to be published 1993.Google Scholar
5. Proceedings of an NEA Workshop on Excavation Response in Geological Repositories for Radioactive Waste, Winnipeg, 1988 (OECD, Paris, 1989).Google Scholar
6. Grambow, B., “Nuclear Waste Glass Dissolution: Mechanism, Model and Application”, JSS Project Technical Report 87–02, SKB, Stockholm, 1987.Google Scholar
7. Curti, E., “Modelling the Dissolution of Borosilicate Glasses for Radioactive Waste Disposal with the PHREEQE/GLASSOL Code: Theory and Practice”, PSI-Bericht Nr. 86 and Nagra NTB 91–08, 1991.Google Scholar
8. Curti, E. and Smith, P.A., “Enhancement of Borosilicate Glass Dissolution by Silica Sorption and Diffusion in Compacted Bentonite: A Model Study”, in Scientific Basisfor Nudear Waste Management XIV, edited by Abrajano, T. Jr., and Johnson, L. H. (Mater. Res. Soc. Proc. 212, Pittsburgh PA, 1991), pp. 31–39.Google Scholar
9. Zwicky, H.U., internal PSI report, 1992.Google Scholar
10. Martindale, N.J., Keer, T.J., Miles, J.C. and Haijtink, B., “The Structural Behaviour of HLW Overpacks under Geological Loading Conditions”, in Radioactive Waste Management and Disposal editor Cecille, L. (Elsevier, London, 1991).Google Scholar
11. McKinley, I.G., Smith, P.A. and Curti, E., “Can the KRISTALLIN I Near-field Model Be Considered Robust ?”, loc. cit. ref. [1], pp. 1770–1776.Google Scholar
12. Curti, E., “Modelling a Bentonite Reference Pore Water for the Swiss High-level Waste Repository”, PSI-Bericht and Nagra NTB, to be published, 1992.Google Scholar
13. Grauer, R., “Zum chemischen Verhalten von Montmorrillonit in einer Endlagerverftillung”, PSI-Bericht Nr. 11 and Nagra NTB 88–24, 1988; [The Chemical Behaviour of Montmorrillonite in a Repository Backfill: Selected Aspects, Nagra NTB 88–24E, 1991].Google Scholar
14. Madsen, F.T. and Kahr, G., “Diffusion von Eisen- und lodidionen in hochverdichtetem Bentonit”, Nagra NTB 91–28, 1991.Google Scholar
15. Cheung, S.C.H., “A New Interpretation of Measured Ionic Diffusion Coefficients in Compacted Bentonite-Based Material”, Engineering Geology 28, 369 (1990).Google Scholar
16. Conca, J.L. and Apted, M.J., “Measurement of Transport Properties in Candidate Repository Host Rocks and Compacted Bentonite”, unpublished report to PNC, March 1992.Google Scholar
17. Smith, P.A., “Modeling of a Diffusion-Sorption Experiment by Linear and Nonlinear Sorption Isotherms”, Nuclear Technology 22, 363 (1990).Google Scholar
18. Whittle, A.J. and Aristorenas, G., “Settlement of Canisters in Compacted Bentonite”, Nagra internal report, 1992.Google Scholar
19. Grenthe, I., “Thermodynamics in Migration Chemistry”, Radiochimica Acta 52/53, 425 (1991).Google Scholar
20. Bruno, J. et al. , “Testing of Geochemical Models in the-Pogos de Caldas Analogue Study”, Nagra NTB 90–29, 1991.Google Scholar
21. Jakob, A., Hadermann, J. and Résel, F., “Radionuclide Chain Transport with Matrix Diffusion and Non-linear Sorption”, PSI-Bericht Nr. 54, 1989, and Nagra NTB 90-05, 1990.Google Scholar
22. Stumm, Werner, Chemistry of tile solid-water interface (John Wiley and Sons, Inc., New York, 1992).Google Scholar
23. McKinley, I.G. and Grogan, H.A., “Radionuclide Sorption Databases for Swiss Repository Safety Assessments”, Radiochimica Acta 52/53, 415 (1991).Google Scholar
24. Mazurek, M., Smith, P.A. and Gautschi, A., “Application of a Realistic Geological Data Base to Safety Assessment Calculations: An Exercise in Interdisciplinary Communication”, in Water-Rock Interaction, edited by Kharaka, Y.K. and Maest, A.S., (Balkema, Rotterdam, 1992), p. 407.Google Scholar
25. NEA and SKI, “The International INTRAVAL Project, Phase 1”, Technical Reports, (OECD, Paris, 1992).Google Scholar
26. Frick, U., Alexander, W.R., Baeyens, B., Bossart, P., Bradbury, M.H., Biihler, Ch., Eikenberg, J., Fierz, Th., Heer, W., Hoehn, E., McKinley, I.G. and Smith, P.A., “Grimsel Test Site, The Radionuclide Migration Experiment--Overview of Investigations 1985-1990”, PSI-Bericht Nr. 120 and Nagra NTB 91–04, 1992.Google Scholar
27. McCarthy, J.F. and Degueldre, C., “Sampling and Characterisation of Colloids and Particles in Groundwater for Studying their Role in the Subsurface Transport of Contaminants”, in Environmental Particfes, edited by Buffle, J. and van Leewen, H. (Lewis, Chelsea, MI, in press).Google Scholar
28. Grauer, R., “Zur Chemie von Kolloiden: Verfiigbare Sorptionsmodelle und zur Frage der Kolloidhaftung”, PSI-Bericht Nr. 65 and Nagra NTB 90–37, 1990.Google Scholar
29. Smith, P. and Degueldre, C., “Colloid Facilitated Transport of Radionuclides through Fractured Media”, J. of Contaminant Hydrology, in press.Google Scholar
30. Miekeley, N., Coutinho de Jesus, H., Porto da Silveira, C.L., and Degueldre, C., “Chemical and Physical Characterisation of Suspended Particles and Colloids in Waters from the Osamu Utsumi Mine and Morro do Ferro Analogue Study Sites, Poqos de Caldas, Brazil”, Nagra NTB 90–27, 1991.Google Scholar
31. Chapman, N.A., McKinley, I.G., Shea, M.E. and Smellie, J.A.T., “The Pogos de Caldas Project: Summary and Implications for Radioactive Waste Management”, Nagra NTB 90–33, 1991.Google Scholar
32. Grauer, R., “Zur Koordinationschemie der Huminstoffe”, PSI-Bericht Nr. 24 and Nagra NTB 89–8, 1989 ["The Coordination Chemistry of Humic Substances”, Nagra NTB 89- 08E, 1991].Google Scholar
33. Van, L. R. Loon, Granacher, S., Hummel, W. and Harduf, H., “The Complexation of Co2+, Ni2+, UO2+ and Ca2+ by Humic Acids. Part I: Effect of pH”, Radiochimica Acta, submitted.Google Scholar
34. BIOMOVS II Progress Report No. I ff., Intera Information Technologies, Henley-on-Thames U.K., 1991 ff.Google Scholar