LOGIN TO YOUR ACCOUNT

Username
Password
Remember Me
Or use your Academic/Social account:

CREATE AN ACCOUNT

Or use your Academic/Social account:

Congratulations!

You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.

Important!

Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message

CREATE AN ACCOUNT

Name:
Username:
Password:
Verify Password:
E-mail:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Publisher: ICE Publishing
Languages: English
Types: Article
Subjects: TA
The thermo-hydraulic-mechanical behaviour of a large in situ heating test, the Buffer/Container Experiment (BCE), carried out at Atomic Energy of Canada's underground research laboratory, is considered. The work can be seen as an extension of the authors' previous research, investigating the behaviour of a large-scale test, the so-called ‘isothermal test’, to now include heating effects. Suggestions related to the micro–macro behaviour of bentonitic buffer materials subjected to resaturation in confined non-isothermal conditions are explored. Simulation of pre-heating phases of the experiment demonstrates the ability of the model to describe the hydraulic regime in the host rock and isothermal infiltration into the buffer. Consideration of the heating phase confirms that the temperature field is well understood, with a good correlation between the numerical and experimental results. In the moisture field it is found that the interaction between the emplaced buffer and host rock is of considerable importance. It is found that inclusion of micro–macro interaction effects, by way of consideration of the impact of swelling and micro–macro interactions on the hydraulic conductivity of the material, yielded significantly improved correlations between observed and calculated results in the moisture field. The results of the numerical simulations suggest that the interaction between the emplaced buffer and host rock is strongly influenced by the micro–macro behaviour of the bentonitic buffer material. It is concluded that the consideration of the impact of micro–macro interactions on moisture flow in bentonitic buffers is of considerable importance, and may be of some significance in considering the total resaturation time as part of the performance assessment of a nuclear waste disposal repository.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • AECL (1994). Environmental impact statement on the concept for disposal of Canada's nuclear fuel waste, AECL-10711, COG93-1. Ontario: Atomic Energy of Canada Limited.
    • Alonso, E. E., Gens, A. & Josa, A. (1990). A constitutive model for partially saturated soils. Ge´otechnique 40, No. 3, 405-430.
    • Andersson, C., Ba´rcena, I., Bono, N., Boergesson, L., Cleall, P., Forsmark, T., Gunnarsson, D., Johannesson, L.-E., Ledesma, A., Liedtke, L., Luukkonen, A., Pedersen, K., Puigdomenech, I., Pusch, R., Rhe´n, I., Rothfuchs, T., Sande´n, T., Sineriz, J.-L., Sugita, Y., Svemar, C. & Thomas, H. (2005). Full-scale testing of the KBS-3V concept for the geological disposal of high-level radioactive waste (prototype repository): Final report, Contract No FIKW-CT-2000-00055. European Atomic Energy Community's R&T Specific Programme 'Nuclear Energy, Key Action: Nuclear Fission Safety 1998-2002' Area: Safety of the Fuel Cycle Directorate-General for Research Euratom EUR 21924.
    • Chandler, N. A. (2000). Water inflow calculations for the isothermal buffer-rock-concrete plug interaction test', Used Fuel Disposal Technology Program Report 06819-REP-01200-10046-R00. Ontario Power Generation.
    • Chandler, N. A., Kjartanson, B. H., Kozak, E. T., Martin, C. D. & Thompson, P. M. (1992). Monitoring the geomechanical and hydrogeological response in granite for AECL research's buffer/ container experiment. Proc. 33rd US Symp. on Rock Mechanics, Sante Fe, 161-170.
    • Cleall, P. J., Melhuish, T. A. & Thomas, H. R. (2006). Modelling the three-dimensional behaviour of a prototype nuclear waste repository. Engng Geol. 85, No. 2, 212-220.
    • Dixon, D. A., Thompson, P. M., Chandler, N. A. & Kozak, E. T. (2000). Instrumentation summary report for the isothermal and buffer/container experiments, Used Fuel Disposal Technology Program Report 06819-REP-01200-10035-R00. Ontario Power Generation.
    • Dixon, D. A., Chandler, N., Graham, J. & Gray, M. N. (2002). Two large-scale sealing tests conducted at Atomic Energy of Canada's underground research laboratory: the buffer-container experiment and the isothermal test. Can. Geotech. J. 39, No. 3, 503-518.
    • European Commission (2007). Work Programme 2008: EURATOM for Nuclear Research and Training Activities., C(2007) 5750. Brussels: European Commission.
    • Ewen, J. & Thomas, H. R. (1989). Heating unsaturated medium sand. Ge´otechnique 39, No. 3, 455-470.
    • Graham, J., Chandler, N. A., Dixon, P. J., Roach, To T. & Wan, A. W. L. (1997) The Buffer/Container experiment: results, synthesis, issues, Technical Report AECL-11746, COG-97-46-I. Ontario: Atomic Energy of Canada Limited.
    • Green, R. E. & Corey, J. C. (1971). Calculation of hydraulic conductivity: a further evaluation of some predictive methods. Proc. Soil Soc. Am. 35, 3-8.
    • Huertas, F., de la Cruz, B., Fuentes-Cantillana, J. L., Alonso, E., Linares, J., Samper, J., Elorza, F. J., Svemar, C., Salo, J.-P., Muurinen, A., Pacovsky´, J., Verstricht, J., Bazargan-Sabet, B., Jockwer, N., Vignal, B., Shao, H., Kickmaier, W., Baeyens, B., Bo¨rgesson, L., Rhe´n, I., Villieras, F., Robinet, J. C. & Gourry, J. C. (2005). Full-scale engineered barriers experiment for a deep geological repository for high-level waste in crystalline host rock-Phase II FEBEX II Final report, Contract No FIKWCT-2000-00016, European Atomic Energy Community's R&T Specific Programme 'Nuclear Energy, Key Action: Nuclear Fission Safety 1998-2002' Area: Safety of the Fuel Cycle Directorate-General for Research Euratom EUR 21922
    • Kjartanson, B. H., Chandler, N. A., Wan, A. W. L., Radhakrishna, H. S. & Lau, K. C. (1993). In situ assessment of bentonite/sand buffer material. Proceedings of the 1993 Joint CSCE-ASCE National Conference on Environmental Engineering, Montreal, 747-755.
    • Radhakrishna, H. S., Lau, K.-C., Kjartanson, B. H. & Cheung, S. C. H. (1990). Modelling the in situ performance of bentonitesand buffer. Mater. Res. Soc. Symp. Proc. 176, 725-732.
    • SKB (2007). RD&D programme 2007: Programme for research, development and demonstration of methods for the management and disposal of nuclear waste, SKB Technical Report 07-12. Stockholm: SKB.
    • Thomas, H. R. & He, Y. (1997). A coupled heat-moisture transfer theory for deformable unsaturated soil and its algorithmic implementation. Int. J. Numer. Methods Engng 40, No. 18, 3421-3441.
    • Thomas, H. R. & He, Y. (1998). Modelling the behaviour of unsaturated soil using an elasto plastic constitutive relationship. Ge´otechnique 48, No. 5, 589-603.
    • Thomas, H. R. & Li, C. L. W. (1997). An assessment of a model of heat and moisture transfer in unsaturated soil. Ge´otechnique 47, No. 1, 113-131.
    • Thomas, H. R., Cleall, P. J., Chandler, N., Dixon, D. & Mitchell, H. P. (2003). Water infiltration into a large-scale in situ experiment in an underground research laboratory. Ge´otechnique 53, No. 2, 207-224.
    • Villar, M. V., Garcia-Sineriz, J. L., Barcena, I. & Lloret, A. (2005). State of the bentonite barrier after five years operation of an in situ test simulating a high level radioactive waste repository. Engng Geol. 80, Nos 3-4, 175-198..
    • Wan, A. W. L., Gray, M. N. & Chandler, N. (1995a), Tracking in situ moisture transients in heated clay. Proc. 1st Int. Conf. on Unsaturated Soils, Paris, 925-932.
    • Wan, A. W. L., Gray, M. N. & Graham, J. (1995b). On the relations of suction, moisture content, and soil structure in compacted clays. Proc. 1st Int. Conf. on Unsaturated Soils, Paris, 215-222.
  • No related research data.
  • Discovered through pilot similarity algorithms. Send us your feedback.

Share - Bookmark

Cite this article