심층처분장 처분공 주변 굴착손상영역에 존재하는 불연속면으로의 압축 벤토나이트 침투
Penetration of Compacted Bentonite into the Discontinuity in the Excavation Damaged Zone of Deposition Hole in the Geological Repository
0
조회
0
다운로드
5
인용
0
참고문헌
키워드
초록
사용후핵연료 심층처분장 처분공에 설치된 압축 벤토나이트 완충재가 처분공 내벽에 형성된 굴착손상영역 불연속면 내로 침투하는 현상을 보다 더 현실적으로 모사할 수 있는 수학적 모델이 개발되었다. 이모델에서는 압축 벤토나이트의 침투를 평행 평판 암반 절리을 통한 Bingham 유체의 이동으로 가정한다. 개발된 모델에 의해 벤토나이트의 침투현상을 분석한 결과, 암반 절리를 통해 압축 벤토나이트가 침투하는 최대 깊이는 포화 압축 벤토나이트의 팽윤압과 암반 절리의 폭에 비례하며, 압축 벤토나이트의항복강도에 반비례하였다. 압축 벤토나이트의 점도는 압축 벤토나이트의 침투 속도를 좌우하나, 최대 침투깊이에는 영향을 미치지 않는다.
Abstract
A mathematical model to simulate more realistically the penetration of compacted bentonite buffer installed in the deposition hole into the discontinuity in the excavation damaged zone formed at the inner wall of the deposition hole in the geological repository for spent fuel is developed. In this model, the penetration of compacted bentonite is assumed to be the flow of Bingham fluid through the parallel planar rock fracture. The penetration of compacted bentonite is analyzed using the developed model. The results show that the maximum penetration depth of compacted bentonite into the rock fracture is proportioned to the swelling pressure of saturated compacted bentonite and the aperture of rock fracture. However, it is in inverse proportion to the yield strength of compacted bentonite. The viscosity of compacted bentonite dominates the penetration rate of compacted bentonite, but has no influence to the maximum penetration depth.
참고문헌 (29)
- Buffer erosion: An overview of concepts and potential safety consequences, "Apted, M. J.", Swedish Radiation Safety Authority, ~, pp.SSM Report 2010:31 (2010)
- Asada, M., "High-density bentonite slurry for seepage barrier", J. of Materials in Civil Engineering, 17, pp.178~187 (2005)
- Bird, R, "Transport Phenomena" (2002), Wiley
- Bentonite erosion, "Birgersson, M", Swedish Nuclear Fuel and Waste Management Company, ~, pp.TR 09-34 (2009)
- Bentonite swelling into fractures at conditions above the critical coagulation concentration, "Borgesson, L", Swedish Nuclear Fuel and Waste Management Company, ~, pp.TR 17-11 (2018)
- WON-JIN CHO, "AN ANALYSIS OF THE FACTORS AFFECTING THE HYDRAULIC CONDUCTIVITY AND SWELLING PRESSURE OF KYUNGJU CA-BENTONITE FOR USE AS A CLAY-BASED SEALING MATERIAL FOR A HIGH-LEVEL WASTE REPOSITORY", Nuclear Engineering and Technology, 44(1), pp.89~102 (2012), 한국원자력학회
- Grindrod, P., "Mechanical interaction between swelling compacted clay and fractured rock and the leaching of clay colloids", Engineering Geology, 54, pp.159~165 (1999)
- Gustafson, G., "Prediction of groutability from grout properties and hydrological data", Tunneling and Underground Space Technology, 11, pp.325~332 (1996)
- Gustafson, G., "Stoping criteria for cement grouting", Felsbau, 23, pp.62~68 (2005)
- Gustafson, G., "Steering parameters for rock grouting", J. of Applied Mathematics, 2013 (2013)
- Hässler, L., "Grouting of rock – Simulation and classification", Ph D, Soil and Rock Mechanics, pp.1991
- Hiemenz, P, "Principles of Colloid and Surface Chemistry" (1986), Marcel Dekker
- Kanno, T., "Evaluation of extrusion and erosion of bentonite buffer", Proc. 7th Int. Conf. on Radioactive Waste Management and Environmental Remediation (1999)
- Study on model for bentonite buffer intrusion (II), "Kanno, T", Japan Nuclear Cycle Development Institute, ~, pp.JNC TJ8400 2003-083 (2003)
- Design for rock grouting based on analysis of grout penetration, Verification using Aspö HRL data and parameter analysis, "Kobayashi, S", Swedish Nuclear Fuel and Waste Management Company, ~, pp.R-07-13 (2007)
- Komine, H., "Simplified evaluation for swelling characteristics of bentonites", Engineering Geology, 71, pp.265~279 (2004)
- Kwon, S., "An investigation of the excavation damaged zone at the KAERI underground research tunnel", Tunn. Undergr. Space Technol, 24, pp.1~13 (2009)
- Lee, C., "Characterization of Thermal-Mechanical Behavior of Rock Mass in the Excavation Damaged Zone at KURT", Ph.D, pp.2012
- 이창수, "한국원자력연구원 내 지하연구시설에서의 굴착손상영역 평가", 터널과 지하공간, 21(5), pp.359~369 (2011), 한국암반공학회
- Lloret, A., "Mechanical behaviour of a heavily compacted bentonite under high suction changes", Géotechnique, 53, pp.27~40 (2003)
- Modelling of erosion of bentonite gel by gel, "sol flow, Swedish Nuclear Fuel and Waste Management Company", Moreno, L, 2010, TR 10-64
- Mechanisms and models for bentonite erosion, "Neretnieks, I", Swedish Nuclear Fuel and Waste Management Company, ~, pp.TR 09-35 (2009)
- 박승훈, "고준위방사성폐기물 처분 기술개발을 위해 건설된 해외 지하연구시설에서의 암반손상대 연구 현황", 화약 발파, 35(3), pp.31~54 (2017), 대한화약발파공학회
- Stability of bentonite gels in crystalline rock- physical aspects, "Pusch, R", Swedish Nuclear Fuel and Waste Management Company, ~, pp.TR 83-04 (1983)
- Choice of Method – Evaluation of Strategies and Systems for Disposal of Spent Nuclear Fuel, "SKB, Svensk Kärnbränslehantering AB", ~, pp.Report P-10-47 (2010)
- Svoboda, J., "The experimental study of bentonite swelling into fissure", Clay Minerals, 48, pp.383~389 (2013)
- Tanai, K., "A study of extrusion behavior of buffer material into fractures", Science & Technology Series, (334), pp.57~64 (2008)
- Tang, A., "Thermo-mechanical behaviour of a compacted swelling clay", Géotechnique, 58, pp.45~54 (2008)
- Yui, Y., "Thermo-mechanical behaviour of compacted GMZ bentonite", Soils and Foundations, 51, pp.1065~1074 (2011)