Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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THM Coupling Analysis for Decovalex-2015 Task B2

Decovalex-2015 Task B2를 위한 THM 해석기법 개발 및 적용

  • Received : 2015.12.11
  • Accepted : 2015.12.24
  • Published : 2015.12.31
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Abstract

The evaluation of THM coupling behavior in deep underground repository condition is essential for the long term safety and stability assessment of high-level radioactive waste repository. In order to develop reliable THM analysis techniques effectively, an international cooperation project, DECOVALEX, is carried out. In DECOVALEX-2015 Task B2, the in situ THM experiment planned to be conducted by JAEA was modeled by the research teams from the participating countries. In this study, a THM coupling technique combining TOUGH2 and FLAC was developed and applied to 1 dimensional THM modeling, in which rock, buffer, and heater are considered. The results were compared with those from other research teams.

고준위방사성폐기물 처분장의 장기 안전성 및 안정성 평가를 위해서는 심지층 처분장 환경에서의 열-수리-역학적 복합 거동에 대한 평가가 필요하다. 신뢰도 높은 THM 해석 기법의 개발을 효과적으로 하기 위해 DECOVALEX 국제공동연구가 수행되고 있다. DECOVALEX-2015 Task B2에서는 일본 JAEA에서 계획중인 현장 THM 실험에 대하여 세계 각국의 연구진이 모델링을 실시하였다. 본 연구에서는 TOUGH2-FLAC을 연계한 THM 해석 기법을 개발하고 이를 이용하여 암반, 완충재, 히터로 구성되는 1차원 THM 모델링을 수행하였으며 해석 결과를 외국의 연구팀 결과와 비교하였다.

Keywords

References

  1. Andersson,J.C., 2007. Aspo Pillar Stability Experiment. Final report. SKB TR-07-01.
  2. Choi, H.J., Lee, J.Y. and Choi, J.W., 2008, Korean Reference HLW Disposal System, Korea Atomic Energy Research Institute, KAERI/TR-3563/2008, pp. 23-35.
  3. Hudson, J.A., Jing, L., 2013, Demonstration of coupled models and their validation against experiment: The current phase DECOVALEX 2015, Rock Characterization, Modelling and Engineering Design Methods-Proceedings of the 3rd ISRM SINOROCK, Symposium, pp. 391-396.
  4. JNC, 2000, H12 project to establish technical basis for HLW disposal in Japan, JNC TN 1410 2000, JAEA, Tokai, Japan.
  5. Kwon, S., Lee, D., Jeon, S., Choi, H. J., 2013, Thermo-mechanical coupling analysis of APSE using submodels and neural networks, Journal of rock mechanical and geotechnical engineering, Vol.5, pp. 32-43. https://doi.org/10.1016/j.jrmge.2012.06.002
  6. Lee,J.Y., Cho,D.K., Choi,H.J. and Wang,L.M., 2011, Analyses of Disposal Efficiency Based on Nuclear Spent Fuels Cooling Time and Disposal Tunnel/Pit Spacing for the Design of a Geological Repository, Progress in Nuclear Energy 53, pp. 361-367. https://doi.org/10.1016/j.pnucene.2011.01.005
  7. Pruess,K., 1999, TOUGH2 User's Guide, Lawrence Berkeley National Laboratory.
  8. Rutqvist, J., Wu, Y.S., Tsang, C.F., Bodvarsson, G., 2002. A modeling approach for analysis of coupled multiphase fluid flow, heat transfer, and deformation in fractured porous rock. International Journal of Rock Mechanics and Mining Sciences, Vol.39, pp.429-442. https://doi.org/10.1016/S1365-1609(02)00022-9
  9. Sugita, Y., Lee,C., Massmann,J., Pan,P., and Rutqvist,J., 2014, Step 1 of the task B2 of the Decovalex-2015, Decovalex-2015 Task B2, interim report.
  10. Tsang, C.F., Barnichonc, J.D., Birkholzera, J., Lid, X.L., Liua, H.H., Sillene, X., 2012, Coupled thermo-hydromechanical processes in the near field of a high-level radioactive waste repository in clay formations, International Journal of Rock Mechanics and Mining Sciences, Vol.49, pp.31-44. https://doi.org/10.1016/j.ijrmms.2011.09.015