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2025 Vol.35, Issue 4 Preview Page

Technical Note

Three-Dimensional Geologic Modeling of a Deep Geologic Repository for High-Level Nuclear Waste: A Point-Cloud Approach Using Surface Geology Data

사용후핵연료 심층처분을 위한 결정질암 부지 3차원 기반모델 구축: 지표 지질자료와 포인트 클라우드를 활용한 접근법

Seon-Kyoung Kim1*
,
Minae Guk2
,
Siyoung Choi3
,
Jung-Hoon Park4
김 선경1*
,
국 민애2
,
최 시영3
,
박 정훈4
1Manager, Research Division, Earth EnG Co., Ltd.
2Staff, Research Division, Earth EnG Co., Ltd.
3Managing Director, Deep Drilling Division, Earth EnG Co., Ltd.
4CEO, Earth EnG Co., Ltd.
1㈜어스이엔지 기술연구소 과장
2㈜어스이엔지 기술연구소 사원
3㈜어스이엔지 시추사업부 전무이사
4㈜어스이엔지 대표이사
*Corresponding Author
31 December 2025. pp. 825-836
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Abstract

We created a geologic site descriptive model (SDM) for site selection, construction, and maintenance of a deep geologic repository for high-level nuclear waste. The purpose of a geologic SDM is to help identify and reduce uncertainties and integration of data from disciplines of related field. Our geologic SDM is divided into data part and interpretation. The data include field mapping data, observations from drillcores, geophysical data, and results from previous studies. These data were then interpreted to create a three-dimensional geological model. Precambrian gneiss and Mesozoic crystalline rocks are typically considered as candidates for sites for deep geological repositories, as they generally have low porosity and hydraulic conductivity. Since the geologic boundaries of these crystalline rocks are generally irregular, we found that representing them with point clouds is an efficient method for constructing 3D geologic models, especially during the early stages of building a 3D geologic model when in-situ drilling and geophysical data are scarce. The 3D geological boundaries generated from these point clouds can be verified against drillcores and geophysical cross-sections and updated as new data become available.

Keywords
point cloud
3D geologic model
geologic site descriptive model
deep geologic repository
crystalline rock

고준위 방사성 폐기물의 안전한 처분을 위한 심층처분시설은 부지 선정, 설계, 시공, 운영의 전 단계에 걸쳐 지질학적 부지기술모델을 필요로 한다. 지질학적 부지기술모델은 심층처분시설의 부지관련 불확실성 파악 및 감소에 핵심적인 역할을 수행한다. 지질학적 부지기술모델의 목표는 불확실성의 파악과 저감에 있다. 불확실성의 저감은 여러 모델링 결과와 지반조사 결과를 지속적으로 통합하여, 정확도를 높이는 피드백 과정을 통해 이루어진다. 우리 연구의 지질학적 부지기술모델은 크게 자료 부분과 해석 부분으로 구분된다. 자료 부분은 지질 조사, 시추, 지구물리 탐사 자료 및 기존 연구 자료로 구성되며, 수집된 자료를 종합적으로 분석하여 구축되는 3차원 지질 모델이 해석부분에 해당된다. 국내 심층처분시설의 후보 부지로는 투수성이 낮은 시·원생대 편마암 및 중생대 화강암 등의 결정질 암석이 고려되는데, 이들 결정질 암석의 지질 경계면 형상은 불규칙한 특징을 보인다. 우리는 이 기술 보고를 통해 불규칙한 지질 경계면을 표현하기 위해 지표의 지질 경계 트레이스를 기반으로 한 포인트 클라우드를 형성하고 이를 보간하여 지질 경계면을 만드는 과정을 기술하고자 한다. 이 방법은 부지조사 초기과정, 즉 많은 시추 또는 탐사자료가 없는 경우에도 부지형상에 대한 초기 모델을 제공할 수 있다는 장점이 있다. 이러한 초기 모델의 지질경계면은 다양한 시추 조사 및 물리 탐사 자료와의 정합성 검토를 거쳐야 하며, 새로운 지반 조사 데이터가 확보될 때마다 지속적으로 업데이트하여 모델의 신뢰성을 제고해야 한다.

키워드
포인트 클라우드
3차원 지질 모델
지질학적 부지기술모델
심층처분시설
결정질 암석
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 35
  • No :4
  • Pages :825-836
  • Received Date : 2025-11-11
  • Revised Date : 2025-12-16
  • Accepted Date : 2025-12-22
  • DOI :https://doi.org/10.9720/kseg.2025.4.825
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