Browse > Article
http://dx.doi.org/10.7733/jnfcwt.2019.17.1.75

Effects of Excavation Damaged Zone on Thermal Analysis of Multi-layer Geological Repository  

Cho, Won-Jin (Korea Atomic Energy Research Institute)
Kim, Jin-Seop (Korea Atomic Energy Research Institute)
Kim, Geon Young (Korea Atomic Energy Research Institute)
Publication Information
Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) / v.17, no.1, 2019 , pp. 75-94 More about this Journal
Abstract
As the present single-layer repository concept requires too large an area for the site of the repository, a multi-layer repository concept has been suggested to improve the disposal density. The effects of the excavation damaged zone around the multi-layer repository constructed in the deep host rock on the temperature distribution in the repository were analyzed. For the thermal analysis of the multi-layer repository, the hydrothermal model was used to consider the resaturation process occurring in the buffer, backfill and rock. The existence of an excavation damaged zone has a significant effect on the temperature distribution in the repository, and the maximum peak temperatures of double-layer and triple-layer repositories can rise to $7^{\circ}C$ and $12^{\circ}C$, respectively depending on the size of the excavation damaged zone and the degree of decrease of the thermal conductivity. The dominant factor affecting the peak temperature in the multi-layer repository is the decrease of thermal conductivity in the excavation damaged zone, and the excavation damaged zone formed around the deposition hole has more significant effects on the peak temperature than does the excavation damaged zone formed around the disposal tunnel.
Keywords
Multi-layer repository; Peak temperature; Excavation damaged zone; Hydrothermal model; Spent fuel;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Swedish Nuclear Fuel and Waste Management Company, Design Premises for a KBS-3V Repository based on Results from the Safety Assessment SR-Can and Some Subsequent Analyses, SKB Technical Report, SKBTR-09-22 (2009).
2 K. Ikonen, Thermal Condition of Open KBS-3H Tunnel, Swedish Nuclear Fuel and Waste Management Company Technical Report, SKB-R-08-24 (2008).
3 Japan Nuclear Cycle Development Institute, H12 Project to Establish Technical Basis for HLW Disposal in Japan - Supporting Report 2 - Repository Design and Engineering Technology, JNC TN1410 2000-003 (2000).
4 G.R. Simmons and P. Baumgartner. The Disposal of Canada's Nuclear Fuel Waste: Engineering for a Disposal Facility, Atomic Energy of Canada Limited Report, AECL-10715, COG-93-5 (1994).
5 P. Wersin, L.H. Johnson, and I.G. Mckinley, "Performance of the Bentonite Barrier at Temperatures beyond $100^{\circ}C$: A Critical Review", Phys. Chem. Earth, Parts A/B/C., 32(8-14), 780-788 (2007).   DOI
6 I. Gaus, L. Johnson, K. Wieczorek, A. Gens, J.L. Garcia-Sineriz, T. Trick, R. Senger, U. Kuhlman, A. Dueck, M.V. Villar, O. Leupin, O. Czaikowski, B. Garitte, K. Schuster, and J.C. Mayor, "EBS Performance at Temperatures above $100^{\circ}C$ - PEBS Case 2", Proc. of Int. Conf. on the Performance of Engineered Barriers, 17-18, February 6-7, 2014, Hannover.
7 W.J. Cho and G.Y. Kim, "Reconsideration of Thermal Criteria for Korean Spent Fuel Repository", Ann. Nucl. Energy, 88, 73-82 (2016).   DOI
8 S. Kwon and J.W. Choi, "Themo-mechanical Stability Analysis for a Multi-level Radioactive Waste Disposal Concept", Geotech. Geol. Eng., 24(2), 361-377 (2006).   DOI
9 Itasca Consulting Group Inc., FLAC3D-Fast Lagrangian Analysis of Continua in Three Dimensions, Ver. 1.1 Users Manual (1996).
10 J.L. Carvalho and C.M. Steed. Themo-mechanical Analysis of a Multi-level Repository for Used Nuclear Fuel, Nuclear Waste Management Organization Report, NWMO TR-2012-19 (2012).
11 J. Lee, H. Kim, M. Lee, H.J. Choi, and K. Kim, "Analyses of the Double-Layered Repository Concepts for Spent Nuclear Fuels", J. Nucl. Fuel Cycle Waste Technol., 15(2), 151-159 (2017).   DOI
12 T. Sato, T. Kikuchi, and K. Sugihara, "In-situ Experiments on an Excavation Disturbed Zone induced by Mechanical Excavation in Neogene Sedimentary Rock at Tono Mine, Central Japan", Eng. Geol., 56(1-2), 97-108 (2000).   DOI
13 W.J. Cho, J.S. Kim, and H.J. Choi, "Hydrothermal Modeling for the Efficient Design of Thermal Loading in a Nuclear Waste Repository", Nucl. Eng. Design, 276, 241-248 (2014).   DOI
14 W.J. Cho, C. Lee, and G.Y. Kim, "Feasibility Analysis of the Multilayer and Multicanister Concepts for a Geological Spent Fuel Repository", Nucl. Technol., 200(3), 225-240 (2017).   DOI
15 C.F. Tsang, F. Bernier, and C. Davies, "Geohydromechanical Processes in the Excavation Damaged Zone in Crystalline Rock, Rock Salt, and Indurated and Plastic clays - in the Context of Radioactive Waste Disposal", Int. J. Rock Mech. Min. Sci., 42(1), 109-125 (2005).   DOI
16 S. Emsley, O. Slsson, L. Seinberg, H.J. Alheid, and S. Falls, ZEDEX- A Study of Damage and Disturbance from Tunnel Excavation by Blasting and Tunnel Boring, Swedish Nuclear Fuel and Waste Management Company Technical Report, SKB-TR 97-30 (1997).
17 P. Marschall, E. Fein, H. Kull, W. Lanyon, L. Liedtke, I. Muller-Lyda, and H. Shao, Conclusions of the Tunnel Near-field Programme (CTN), National Cooperative for the Disposal of Radioactive Waste Technical Report, NAGRA TR-99-07 (1999).
18 H. Matsui, T. Sato, K. Sugihara, and T. Kikuchi, Overview of the EDE (Excavation Disturbance Experiment)-II at Kamaishi Mine, Kamaishi Int. Workshop Proc., PNC TN7413 98-023, August 24-25, 1998, Japan Nuclear Cycle Development Institute, Tokyo.
19 Dassault Systems Simulia Corp., ABAQUS/CAE 6.14 User's Manual (2014).
20 W.J. Cho, J.S. Kim, C. Lee, and H.J. Choi, In-situ Experiments for the Performance of Engineered Barrier in KURT, Korea Atomic Energy Research Institute Technical Report, KAERI/TR-4729/2012 (2012).
21 M.A. Grant, "Permeability Reducing Factors at Wairakei", Paper 77-HT-52, presented at AICHE-ASME Heat Transfer Conference, August 15-17, 1977, Salt Lake City, Utah.
22 W.J. Cho, J.S. Kim, C. Lee, and H.J. Choi, "Gas Permeability in the Excavation Damaged Zone at KURT", Eng. Geol., 164, 222-229 (2013).   DOI
23 C. Lee, S. Kwon, J. Choi, and S. Jeon, "An Estimation of the Excavation Damaged Zone at the KAERI Underground Research Tunnel", J. Kor. Rock. Mech., 21(5), 359-369 (2011).
24 K. Pruess, C. Oldenburg, and G. Moridis, TOUGH2 User's Guide, Version 2.0, Lawrence Berkeley National Laboratory Report, LBNL-43134 (1990).
25 I. Fatt and W.A. Klikoff, "Effect of Fractional Wettability on Multiphase Flow through Porous Media", Trans. AIME, 216, 426-432 (1959).
26 M.T. van Genuchten, "A Closed-form Equation for Predicting the Hydraulic Conductivity of Unsaturated Soils", Soil Sci. Soc. Am. J., 44, 892-898 (1980).   DOI
27 W. Tanikawa and T. Shimamoto, "Comparison of Klinkenberg-corrected Gas Permeability and Water Permeability in Sedimentary Rocks", Int. J. Rock Mech. Min. Sci., 46(2), 229-238 (2009).   DOI
28 N.H. Chen and D.F. Othmer, "New Generalized Equation for Gas Diffusion Coefficient", J. Chem. Eng. Data, 7(1), 37-41 (1962).   DOI
29 W.J. Cho, J.O. Lee, and S. Kwon, "Analysis of Thermo-hydro-mechanical Process in the Engineered Barrier System of a High-level Waste Repository", Nucl. Eng. Design, 240(6), 1688-1698 (2010).   DOI
30 H.J. Choi, J.Y. Lee, and S.S. Kim, Korean Reference HLW Disposal System, Korea Atomic Energy Research Institute Technical Report, KAERI/TR-3563/2008 (2008).
31 W.J. Cho, J.O. Lee, and S. Kwon, "An Empirical Model for the Thermal Conductivity of Compacted Bentonite and a Bentonite-sand Mixture", Heat Mass Transf., 47(11), 1385-1393 (2011).   DOI
32 W.J. Cho, J.O. Lee and C.H. Kang, Hydraulic Properties of Domestic Bentonite-Sand Mixture as a Backfill Material in the High-level Waste Repository, Korea Atomic Energy Research Institute Technical Report, KAERI/TR-1487/2000 (2000).
33 W.J. Cho, J.O. Lee, and C.H. Kang, "Influence of Temperature Elevation on the Sealing Performance of Buffer in a High-level Waste Repository", Ann. Nucl. Energy, 27(14), 1271-1284 (2000).   DOI
34 W.J. Cho, J.O. Lee, and H.J. Choi. Thermal Conductivity of Domestic Compacted Bentonite and Bentonite-Sand Mixture, Korea Atomic Energy Research Institute Technical Report, KAERI/TR-5561/2014 (2014).
35 W.J. Cho and S. Kwon, "Estimation of the Thermal Conductivity for Partially Saturated Granite", Eng. Geol., 115(1-2), 132-138 (2010).   DOI
36 J.O. Lee, W.J. Cho, and S. Kwon. Water Potential Characteristics of Domestic Bentonite, Korea Atomic Energy Research Institute Technical Report, KAERI/TR-4232/2010 (2010).
37 Y. Mualem, "A New Model for Predicting the Hydraulic Conductivity of Unsaturated Porous Media", Water Resour. Res., 12(3), 513-522 (1976).   DOI
38 R.H. Perry and C.H. Chilton. Chemical Engineer's Handbook, 5th ed., McGraw-Hill, New York (1973).