Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) (방사성폐기물학회지)

Korean Radioactive Waste Society (한국방사성폐기물학회)
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International Joint Research for the Colloid Formation and Migration in Grimsel Test Site: Current Status and Perspectives

  • Received : 2022.08.02
  • Accepted : 2022.09.21
  • Published : 2022.12.30
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Abstract

Colloid Formation and Migration (CFM) project is being carried out within the Grimsel Test Site (GTS) Phase Ⅵ. Since 2008, the Korea Atomic Energy Research Institute (KAERI) has joined CFM to investigate the behavior of colloid-facilitated radionuclide transport in a generic Underground Research Laboratory (URL). The CFM project includes a long-term in-situ test (LIT) and an in-rock bentonite erosion test (i-BET) to assess the in-situ colloid-facilitated radionuclide transport through the bentonite erosion in the natural flow field. In the LIT experiment, radionuclide-containing compacted bentonite was equipped with a triple-packer system and then positioned at the borehole in the shear zone. It was observed that colloid transport was limited owing to the low swelling pressure and low hydraulic conductivity. Therefore, a postmortem analysis is being conducted to estimate the partial migration and diffusion of radionuclides. The i-BET experiment, that focuses more on bentonite erosion, was newly designed to assess colloid formation in another flow field. The i-BET experiment started with the placement of compacted bentonite rings in the double-packer system, and the hydraulic parameters and bentonite erosion have been monitored since December 2018.

Keywords

Acknowledgement

This work was supported by the Institute for Korea Spent Nuclear Fuel (iKSNF) and National Research Foundation of Korea (NRF) grant funded by the Korea government (Ministry of Science and ICT, MSIT) (No. 2021M2E1A1085202).

References

  1. N. Chapman and A. Hooper, "The Disposal of Radioactive Wastes Underground", Proc. Geol. Assoc., 123(1), 46-63 (2012). https://doi.org/10.1016/j.pgeola.2011.10.001
  2. S. Yoon, M.J. Kim, S.R. Lee, and G.Y. Kim, "Thermal Conductivity Estimation of Compacted Bentonite Buffer Materials for a High-Level Radioactive Waste Repository", Nucl. Technol., 204(2), 213-226 (2018). https://doi.org/10.1080/00295450.2018.1471909
  3. T. Schafer, F. Huber, H. Seher, T. Missana, U. Alonso, M. Kumke, S. Eidner, F. Claret, and F. Enzmann, "Nanoparticles and Their Influence on Radionuclide Mobility in Deep Geological Formations", Appl. Geochem., 27(2), 390-403 (2012). https://doi.org/10.1016/j.apgeochem.2011.09.009
  4. T. Missana, U. Alonso, and M.J. Turrero, "Generation and Stability of Bentonite Colloids at the Bentonite/Granite Interface of a Deep Geological Radioactive Waste Repository", J. Contam. Hydrol., 61(1-4), 17-31 (2003). https://doi.org/10.1016/S0169-7722(02)00110-9
  5. I. Blechschmidt, S. Vomvoris, J. Rueedi, and J. Martin, "Grimsel Test Site - Phase Ⅵ: Review of Accomplishments and Next Generation of In-Situ Experiments Under Repository Relevant Boundary Conditions", in: Scientific Basis for Nuclear Waste Management XXXI, 547, MRS Online Proceedings Library (2008).
  6. A. Mori, W.R. Alexander, H. Geckeis, W. Hauser, T. Schafer, J. Eikenberg, Th. Fierz, C. Degueldre, and T. Missana, "The Colloid and Radionuclide Retardation Experiment at the Grimsel Test Site: Influence of Bentonite Colloids on Radionuclide Migration in a Fractured Rock", Colloids Surf. A Physicochem. Eng. Asp., 217(1-3), 33-47 (2003). https://doi.org/10.1016/S0927-7757(02)00556-3
  7. P. Andersson, J. Byegard, E.L. Tullborg, T. Doe, J. Hermanson, and A. Winberg, "In Situ Tracer Test to Determine Retention Properties of a Block Scale Fracture Network in Granitic Rock at the Aspo Hard Rock Laboratory, Sweden", J. Contam. Hydrol., 70(3-4), 271-297 (2004). https://doi.org/10.1016/j.jconhyd.2003.09.009
  8. P. Vilks, N.H. Miller, and A. Vorauer, "Laboratory Bentonite Colloid Migration Experiments to Support the Aspo Colloid Project", Phys. Chem. Earth, 33(14-16), 1035-1041 (2008). https://doi.org/10.1016/j.pce.2008.05.013
  9. G.Y. Kim, K. Kim, J.Y. Kim, W.J. Kim, and J.S. Kim, "Current Status of the KURT and Long-term In-situ Experiments", J. Korean Soc. Miner. Energy Resour. Eng., 54(4), 344-357 (2017). https://doi.org/10.12972/ksmer.2017.54.4.344
  10. M.H. Baik, C.K. Park, J.K. Lee, and J.W. Choi. Research Status and Feasibility Analysis on the Participation in International Joint Studies for Radionuclide and Colloid Migration Using Foreign Underground Research Facilities, Korea Atomic Energy Research Institute Technical Report, TR-3499 (2007).
  11. W.R. Alexander, B. Frieg, and K. Ota. The Nagra-JAEA In Situ Study of Safety Relevant Radionuclide Retardation in Fractured Crystalline Rock, Nagra Technical Report, NTB 00-07 (2009).
  12. W. Kickmaier and I. Mckinley, "A Review of Research Carried Out in European Rock Laboratories", Nucl. Eng. Des., 176(1-2), 75-81 (1997). https://doi.org/10.1016/S0029-5493(96)01344-1
  13. L. Schlickenrieder, G.W. Lanyon, K. Kontar, and I. Blechschmidt. Colloid Formation and Migration Project: Site Instrumentation and Initiation of the Longterm In-situ Test, Nagra Technical Report, NTB 15-03 (2017).
  14. I. Blechschmidt and S. Vomvoris, "The Fourth Decade of Underground Research at the Grimsel Test Site - What We Have Learned and Where We Go From Here - 15075", Proc. of WM 2015, March 16-19, 2015, Phoenix.
  15. M.H. Baik, J.K. Lee, and I. Blechschmidt, "Introduction to the Colloid Formation and Migration (CFM) Project at the Grimsel Test Site (GTS) Phase VI", Proc. of the Transactions of the Korean Nuclear Society Spring Meeting, May 22, 2009, Jeju.
  16. U. Noseck, J. Flugge, P. Reimus, V. Cvetkovic, G.W. Lanyon, Th. Schafer, and I. Blechschmidt. Colloid Formation and Migration Project: Modelling of Tracer, Colloid and Radionuclide/Homologue Transport for Dipole CFM 06.002 - Pinkel Surface Packer, Nagra Technical Report, NTB 16-06 (2016).
  17. F.R. Rinderknecht, "Bentonite Erosion and Colloid Mediated Transport of Radionuclides in Advection Controlled Systems", Ph.D Dissertation, Karlsruhe Institute of Technology (2017).
  18. H. Geckeis, M. Altmaier, and S. Fanghanel. Annual Report 2018/19, Karlsruhe Institute of Technology Report (2020).
  19. F. Quinto, I. Blechschmidt, C.G. Perez, H. Geckeis, F. Geyer, R. Golser, F. Huber, M. Lagos, B. Lanyon, M. Plaschke, P. Steier, and T. Schafer, "Multiactinide Analysis With Accelerator Mass Spectrometry for Ultratrace Determination in Small Samples: Application to an In Situ Radionuclide Tracer Test Within the Colloid Formation and Migration Experiment at the Grimsel Test Site (Switzerland)", Anal. Chem., 89(13), 7182-7189 (2017). https://doi.org/10.1021/acs.analchem.7b01359
  20. I. Neretnieks and L. Moreno. Revisiting Bentonite Erosion Understanding and Modelling Based on the BELBaR Project Findings, SVENSK KARNBRANSLEHANTERING AB Technical Report, SKB TR17-12 (2017).
  21. P. Sellin and O.X. Leupin, "The Use of Clay as an Engineered Barrier in Radioactive-Waste Management - A Review", Clays Clay Miner., 61(6), 477-498 (2013). https://doi.org/10.1346/CCMN.2013.0610601
  22. U. Alonso, T. Missana, A.M. Fernandez, and M. Garcia-Gutierrez, "Erosion Behavior of Raw Bentonites Under Compacted and Confined Conditions: Relevance of Smectite Content and Clay/Water Interactions", Appl. Geochem., 94, 11-20 (2018). https://doi.org/10.1016/j.apgeochem.2018.04.012
  23. National Cooperative for the Disposal of Radioactive Waste. October 21 2021. "Colloid Formation and Migration : I-BET (In Rock Bentonite Erosion Test)." Grimsel Test Site. Accessed Aug. 15 2022. Available from: https://www.grimsel.com/gts-projects/cfm-section/cfm-ibet-in-rock-bentonite-erosion-test.
  24. A. Keppler, "Hydrogeologische, Hydrochemische und Isotopenhydrologische Untersuchungen an den Oberflachen- und Kluftwassern im Grimselgebiet, Schweiz", Ph.D Dissertation, Ludwig-Maximilians-Universitat (1994).
  25. U. Frick, W.R. Alexander, B. Baeyens, P. Bossart, M.H. Bradbury, Ch. Buhler, J. Eikenberg, Th. Fierz, W. Heer, E. Hoehn, I.G. Mckinley, and P.A. Smith. The Radionuclide Migration Experiment - Overview of Investigations 1985-1990, Nagra Technical Report, NTB 91-04 (1992).
  26. R. Schneeberger, "Interplay in 3D Between Faults and Water Flow Paths in Crystalline Bedrock (Grimsel, Switzerland)", Ph.D Dissertation, University of Bern (2017).