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완충재 설계시 고려사항 및 고기능 완충재 연구 현황
Design Considerations for Buffer Materials and Research Status of Enhanced Buffer Materials 원문보기

터널과 지하공간: 한국암반공학회지 = Tunnel and underground space, v.32 no.1, 2022년, pp.59 - 77  

이기준 (한국원자력연구원) ,  윤석 (한국원자력연구원) ,  김태현 (한국원자력연구원) ,  김진섭 (한국원자력연구원)

초록
AI-Helper 아이콘AI-Helper

현재 고준위방사성폐기물 처분을 위한 완충재의 설계 기준 온도는 100 ℃ 미만이기에 완충재의 열 분산 능력이 개선된다면 처분장의 처분 터널과 처분 공의 간격을 줄일 수 있다. 본 연구에서는 완충재의 열-수리-역학 성능 기준을 분석하고자 하였으며, 완충재의 열전도도를 개선할 수 있는 고기능 완충재의 연구 현황에 대해 알아보고자 하였다. 우선, 열전도도는 가능한 높아야 하며 완충재의 열전도도 값은 건조밀도, 함수비, 온도, 광물조성, 벤토나이트 유형에 영향을 받는다. 또한 완충재에 함유된 유기물은 처분용기의 부식 성능에 큰 영향을 미칠 수 있기에 완충재의 유기물 함량은 매우 낮아야 한다. 수리전도도는 근계암반보다 더 낮게 설정해야 하며, 완충재가 제 기능을 하기 위해 팽윤성이 적정해야 한다. 고기능 완충재 개발을 위해 대표적으로 모래, 흑연, 산화 흑연 등의 첨가제를 사용하며 흑연의 경우 모래보다 아주 적은 첨가량으로 열전도도를 크게 향상시킬 수 있다.

Abstract ▼ AI-Helper 아이콘AI-Helper

Currently, the design reference temperature of the buffer material for disposing of high-level radioactive waste is less than 100℃, so if the heat dissipation capacity of the buffer material is improved, the spacings of the disposal tunnel and the deposition hole in the repository can be redu...

주제어

#벤토나이트   #고기능 벤토나이트   #영향인자   #고준위방사성폐기물 처분장  

표/그림 (17)

참고문헌 (85)

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