Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Feasibility Study on Recycling of Concrete Waste from NPP Decommissioning Through Literature Review

기존 문헌 분석을 통한 원전 콘크리트 해체 폐기물 재활용 가능성에 대한 연구

  • Cheon, Ju-Hyun (Construction Technology Research Center, Korea Conformity Laboratories) ;
  • Lee, Seong-Cheol (Department of Civil Engineering, Kyungpook University) ;
  • Kim, Chang-Lak (Department of Nuclear Engineering, Kepco International Nuclear Graduate School) ;
  • Park, Hong-Gi (Department of Civil Environment Engineering, Gachon University)
  • 천주현 (한국건설생활환경시험연구원.건설기술연구센터) ;
  • 이성철 (경북대학교 토목공학과) ;
  • 김창락 (한국전력 국제원자력대학원대학교) ;
  • 박홍기 (가천대학교 토목환경공학과)
  • Received : 2018.05.15
  • Accepted : 2018.06.22
  • Published : 2018.06.30
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Abstract

In this paper, the feasibility of recycling concrete waste as a method to reduce final disposal amount of wastes generated through decommissioning of nuclear power plant has been analyzed based on experimental results of existing literature. When recycled concrete waste was used as recycled aggregate, it was investigated through literature that the concrete strength decreased by 30~40% depending on the mixing ratio. It was also investigated that concrete with recycled aggregate can be used as a structural material when the quality of recycled aggregate is well managed since no significant problem was found. When recycled cement produced from concrete waste was used, the strength of concrete or mortar decreased considerably as the recycled cement content increased. Therefore, it can be concluded that concrete or mortar with recycled cement can be used as a filling material for final disposal of large radioactive waste rather than for structural use. This paper is expected to be useful for reduction on disposal volume and decommissioning cost for nuclear power plants such as Kori 1.

본 논문에서는 원자력발전소 해체 시 다량으로 발생하는 폐기물에 대한 최종 처분량을 줄이기 위한 방안으로 콘크리트 폐기물을 재활용하는 방안에 대해 기존 문헌의 실험 결과를 토대로 비교 및 분석을 수행하였다. 콘크리트 폐기물을 재활용하는 방안 중 순환 골재로 활용할 경우, 혼입률에 따라 콘크리트 강도가 최대 30~40% 정도 감소하는 것으로 나타났다. 다만, 순환 골재의 품질 관리가 양호할 경우 재활용 콘크리트를 구조용 재료로서 사용하는 데 큰 문제가 없는 것으로 판단된다. 재생 시멘트로 활용할 경우, 재생 시멘트의 혼입률이 증가할수록 콘크리트 또는 모르타르의 강도가 급격히 감소하는 것으로 나타났다. 따라서 재생 시멘트로 활용할 경우 구조용보다 대형 방사성 폐기물 최종 처분 시 충전용으로 활용할 수 있을 것으로 판단된다. 본 논문은 향후, 고리 1호기 등 원자력발전소 해체 시 처분 물량 및 해체 비용 절감 등을 위한 방안 마련에 유용할 것으로 기대된다.

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References

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