Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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Introduction on Site-Descriptive Modeling for Site Selection of Deep Geological Disposal in Sweden

심층처분 부지선정을 위한 스웨덴 부지모사 모델링 적용 사례 소개

  • Kim, Hyunwoo (Deep Subsurface Research Center, Geologic Environment Division, Korea Institute of Geosciences and Mineral Resources) ;
  • Park, Chan-Hee (Deep Subsurface Research Center, Geologic Environment Division, Korea Institute of Geosciences and Mineral Resources) ;
  • Park, Eui-Seob (Deep Subsurface Research Center, Geologic Environment Division, Korea Institute of Geosciences and Mineral Resources) ;
  • Jung, Yong-Bok (Deep Subsurface Research Center, Geologic Environment Division, Korea Institute of Geosciences and Mineral Resources)
  • 김현우 (한국지질자원연구원 지질환경연구본부 심지층연구센터) ;
  • 박찬희 (한국지질자원연구원 지질환경연구본부 심지층연구센터) ;
  • 박의섭 (한국지질자원연구원 지질환경연구본부 심지층연구센터) ;
  • 정용복 (한국지질자원연구원 지질환경연구본부 심지층연구센터)
  • Received : 2021.02.22
  • Accepted : 2021.03.30
  • Published : 2021.04.30
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Abstract

SKB, the Swedish Nuclear Fuel and Waste Management Company, has a leading position in developing deep geological disposal technologies and it has introduced the concept of three-dimensional site-descriptive modeling (SDM). SDM provides a holistic view and integrated model of investigated sites in site-selection stage. The model is based on the geoscientific disciplines including geology, rock mechanics and thermal properties, hydrogeology, hydrogeochemistry, bedrock transport properties, and surface ecology. The site-descriptive model is connected to the quality-assured databases containing site investigation data, uncertainties in parameters describing material properties, suggested methods, testing standards, etc. Therefore, it can provide data relevant to repository layout and assessment of long-term safety. In this case study, we summarized the SKB's history of site investigation and site-descriptive modeling, and described workflow and software tools for SDM. We have suggested some items, such as integrated development environment, pilot project, and digital twins, based on experts' reviews on the SKB's SDM-site Report or Safety Assessment Report.

심층처분 연구에서 선도적 위치에 있는 스웨덴의 SKB는 후보부지 선정 과정에서 개별적으로 수집되는 현지조사 자료와 모델링 결과를 근거로 하여 다양한 측면에서 처분장의 안전성을 평가할 수 있고, 정보들을 통합하여 전체적으로 조망할 수 있는 방법으로 부지모사 모델링을 도입하였다. 부지모사 모델은 해당부지의 지질정보를 파악할 수 있도록 3차원 모델로 가시화하고 수치해석 코드 등에서 재현할 수 있게 형상 정보를 제공한다. 부지모사 모델은 모델 제작에 필요한 지반조사 결과와 자료의 불확실성, 조사기준 및 방법 등 각종 데이터베이스와도 연계되어 있어 처분장의 안전성 평가나 시설물 설계 시 필요한 자료를 제공할 수 있다. 본 사례연구에서는 SKB의 부지모사 모델 제작 이력, 모델링 기법의 특징 및 소프트웨어 등 일반사항을 요약하였으며, 전문가 집단이 부지모사 모델에 대해 제시한 검토 의견을 분석하여 부지모사 모델이 필수적으로 갖춰야 할 요건과 통합작업환경, 파일럿 프로젝트 운영, 디지털트윈으로의 확대 등 향후 기술 개발 과정에서 고려할 만한 사항들을 도출하였다.

Keywords

Acknowledgement

본 연구는 한국지질자원연구원 기본사업인 '심지층 개발과 활용을 위한 지하심부 특성평가 기술 개발(과제코드 GP2020-010)'의 일환으로 수행되었습니다.

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