Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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Geoscientific Research of Bedrock for HLW Geological Disposal using Deep Borehole

고준위방사성폐기물 심층처분을 위한 심부 시추공을 활용한 암반의 지구과학적 조사

  • Dae-Sung, Cheon (Geology Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Won-Kyong, Song (Geology Division, Korea Institute of Geoscience and Mineral Resources) ;
  • You Hong, Kihm (Geology Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Seungbeom, Choi (Disposal Safety Evaluation Research Division, Korea Atomic Energy Research Institute) ;
  • Seong Kon, Lee (Mineral Resources Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Sung Pil, Hyun (Climate Change Response Divsion, Korea Institute of Geoscience and Mineral Resources) ;
  • Heejun, Suk (Climate Change Response Divsion, Korea Institute of Geoscience and Mineral Resources)
  • 천대성 (한국지질자원연구원 국토지질연구본부) ;
  • 송원경 (한국지질자원연구원 국토지질연구본부) ;
  • 김유홍 (한국지질자원연구원 국토지질연구본부) ;
  • 최승범 (한국원자력연구원 핵연료주기환경연구소 저장처분기술관리부) ;
  • 이성곤 (한국지질자원연구원 광물자원연구본부) ;
  • 현성필 (한국지질자원연구원 기후변화대응연구본부) ;
  • 석희준 (한국지질자원연구원 기후변화대응연구본부)
  • Received : 2022.12.09
  • Accepted : 2022.12.19
  • Published : 2022.12.31
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Abstract

In step-by-step site selection for geological disposal of high-level radioactive waste, parameters necessary for site selection will be acquired through deep drilling surveys from the basic survey stage. Unlike site investigations of rock mass structures such as tunnels and underground oil storage facilities, those related to the geological disposal of high-level radioactive waste are not only conducted in relatively deep depths, but also require a high level of quality control. In this report, based on the 750 m depth drilling experience conducted to acquire the parameters necessary for deep geological disposal, the methodology for deep drilling and the geology, geophysics, geochemistry, hydrogeology and rock mechanics obtained before, during, and after deep drilling are discussed. The procedures for multidisciplinary geoscientific investigations were briefly described. Regarding in-situ stress, one of the key evaluation parameter in the field of rock engineering, foreign and domestic cases related to the geological disposal of high-level radioactive waste were presented, and variations with depth were presented, and matters to be considered or agonized in acquiring evaluation parameters were mentioned.

고준위방사성폐기물 심층처분을 위한 단계별 부지선정에 있어 기본조사부터 심부 시추조사를 통해 부지선정에 필요한 요소들을 획득할 예정이다. 터널이나 유류지하저장소 등과 같은 암반구조물의 지반조사와 달리 고준위방사성폐기물 처분과 관련된 지반조사는 매우 깊은 심도까지 수행될 뿐 아니라 높은 수준의 품질관리가 요구된다. 본 보고에서는 심부 지질특성화에 필요한 요소를 획득하기 위해 수행하였던 750 m급 심부 시추경험을 토대로 심부 시추에 대한 방법론과 심부 시추 전, 시추 중, 시추 후 획득하는 지질학, 지구물리학, 수리화학, 수리지질학, 암반공학 등 다학제적 지구과학적 조사에 대한 절차 등에 대해 간략하게 서술하였다. 암반공학분야의 핵심 평가인자 중 현지응력에 대해서는 고준위방사성폐기물 심층처분관련 국외 사례와 국내 사례를 통하여 심도에 따른 응력변화를 고찰하였다.

Keywords

Acknowledgement

본 논문은 한국지질자원연구원 2022년 기본사업의 하나인 "HLW 심층처분을 위한 지체구조별 암종 심부 특성 연구(GP2021-002; 22-3115)" 사업의 지원을 받아 수행하였습니다. 현장작업을 수행한 (주)지오그린21과 (주)희송지오텍 관계자분의 노고에 감사드립니다.

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