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논문

사용후핵연료 심층처분장 건설을 위한 암반 열물성 측정 기술과 현황 분석

Review on the Measurement of Thermal Properties of Rocks for Deep Geological Disposal of Spent Nuclear Fuel

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주제분류자원공학

초록

본 논문은 열물성의 측정이론, 이에 수반된 고려사항과 국내외 심층처분장 부지조사에서 획득된열물성 조사 사례를 소개하였다. 조사된 열물성은 열전도도, 비열, 열확산율, 열팽창율 등이며, 각물성별 실내측정법을 ASTM 표준시험법과 ISO 표준시험법 중에 암석에 적용가능한 시험법을 중심으로 요약하였고, 핀란드 POSIVA에서 개발한 현장측정방법도 소개하였다. 그리고 열물성 측정시 고려되어야 하는 온도의존성, 이방성, 압력의존성, 광물조성을 고려한 등가열물성 등을 국내외연구사례를 중심으로 제시하였다. 이와 더불어, 대표적인 해외 심층처분 연구 대상인 스웨덴 포쉬마크 처분후보지, 핀란드 온칼로 URL, 스위스 몬 테리 URL, 프랑스 뫼즈/오트마른 URL에서의 열물성 조사사례를 통해 화강암과 셰일 등 다양한 암종에서의 열물성 특성을 파악하였고 한국 KURT 에서의 열물성 연구 현황도 제시하였다.

Abstract

This study investigated the thermal properties of rocks, including thermal conductivity, specific heat, thermal diffusivity, and the thermal expansion coefficient. Here, testing methods for the thermal properties of rocks were introduced based on ASTM, ISO, and the field measurement method developed by POSIVA in Finland. Previous studies have shown that the thermal properties of rocks show temperature dependence, anisotropy, pressure dependence, and mineral composition dependence; therefore, these characteristics require examination. The thermal properties of granitic and clayey rocks were investigated at the Swedish Forsmark disposal site, Finland Onkalo URL, Switzerland Mont terri URL, and France Meuse/Haute-Marne URL.

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