방사성폐기물학회지 (Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT))

  • 제11권2호
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  • Pages.133-156
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  • 2013
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  • 1738-1894(pISSN)
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  • 2288-5471(eISSN)
한국방사성폐기물학회 (Korean Radioactive Waste Society)
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방사성폐기물 처분에서 자연유사연구 역할 및 연구 동향

Research Status and Roles of Natural Analogue Studies in the Radioactive Waste Disposal

  • 투고 : 2013.03.14
  • 심사 : 2013.04.30
  • 발행 : 2013.06.30
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초록

자연유사연구는 방사성폐기물의 지하 처분에서 안전성평가를 포함하는 다중의 안전성 확보를 요구하는 safety case에서 중요한 역할을 담당하고 있다. 본 연구에서는 해외의 자연유사연구 동향을 조사하여, 처분장 재료물질들과 핵종이동 및 지연과 관련된 자연유사연구 결과들을 연구주제별로 정리하고, 주요 연구결과와 문제점, 결과의 활용성 등에 초점을 두고 분석하였다. 아울러 국내에서 수행된 자연유사연구 결과들을 우라늄 광상 연구, 암반을 이용한 연구, 지하수를 이용한 연구, 고고학적 유물을 이용한 연구 등으로 분류하고, 그 주요 결과들을 정리하였다. 지난 수 십 년 동안 수행되어 온 방대한 양의 자연유사연구 결과들이 존재하지만, 처분안전성 평가와 safety case 개발에 적극적으로 활용되지 못하였다. 따라서 본 연구에서는 자연유사연구 결과의 활용방법을 정리하고, 활용성을 증진하기 위한 방법론을 검토하였다. 방사성폐기물 처분장에 대한 안전성 평가의 신뢰성을 증진하고 검증하기 위해서는 자연유사연구의 수행은 필수적이다. 따라서 자연유사연구 결과들을 safety case 개발에 활용하기 위해서는 자연유사 정보 데이터베이스의 구축과 함께 활용방법론이 개발되어야 할 필요가 있다.

Natural analogue studies play an important role in the safety case which requires multiple lines of evidence including the safety assessment for the geological disposal of radioactive wastes. In this study, foreign status of natural analogue studies was investigated by summarizing natural analogue results according to the research topics related with repository materials and radionuclide migration and retardation. Main results, issues, and applicability of the foreign natural analogue studies were also analyzed. The results of domestic natural analogue studies were classified into studies using uranium ore bodies, rocks, groundwaters, and archeological artifacts, respectively, and their main results were summarized. There are massive materials for natural analogue studies which have been carried out during last several decades but they have not been actively applied to the safety assessment and safety case development for the radioactive waster disposal. Thus, in this study, applicable methods of natural analogues were summarized and a methodology for improving their applicability was examined. Natural analogue study is apparently necessary to improve and illustrate the reliability of safety assessment for a radioactive waste repository. Therefore, it is necessary to develop a methodology and construct a natural analogue information database for the application of the results from natural analogue studies to safety case development.

키워드

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