• 제목/요약/키워드: Uranium Liquid Radwaste

검색결과 2건 처리시간 0.018초

Evaluation of cementation of intermediate level liquid waste produced from fission 99Mo production process and disposal feasibility of cement waste form

  • Shon, Jong-Sik;Lee, Hyun-Kyu;Kim, Tack-Jin;Kim, Gi-Yong;Jeon, Hongrae
    • Nuclear Engineering and Technology
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    • 제54권9호
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    • pp.3235-3241
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    • 2022
  • The Korea Atomic Energy Research Institute (KAERI) is planning the construction of the KIJANG Research Reactor (KJRR) for stable supply of 99Mo. The Fission 99Mo Production Process (FMPP) of KJRR produces solid waste such as spent uranium cake and alumina cake, and liquid waste in the form of intermediate level liquid waste (ILLW) and low level liquid waste (LLLW). This study thus established the operating range and optimum operating conditions for the cementation of ILLW from FMPP. It also evaluated whether cement waste form samples produced under optimum operational conditions satisfy the waste acceptance criteria (WAC) of a disposal facility in Korea (Korea radioactive waste agency, KORAD). Considering economic feasibility and safety, optimum operational conditions were achieved at a w/c ratio of 0.55, and the corresponding salt content was 5.71 wt%. The cement waste form samples prepared under optimum operational conditions were found to satisfy KORAD's WAC when tested for structural stability and leachability. The results indicate that the proposed cementation conditions for the disposal of ILLW from FMMP can be effectively applied to KJRR's disposal facility.

방사성 액체 폐기물 내 우라늄 흡착에 대한 활성탄의 표면 처리 영향 (Effect of Surface-Modification of Activated Carbon for Adsorption of Uranium in Radioactive Liquid Wastes)

  • 장재덕;이근우;송기찬;강호;오원진
    • 대한환경공학회지
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    • 제22권5호
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    • pp.827-835
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    • 2000
  • $HNO_3$ 및 NaOH 용액으로 표면 처리한 활성탄을 이용하여 방사성 액체 폐기물 내에 잔존하는 우라늄의 흡착 특성을 조사하였다. $HNO_3$ 처리후 NaOH로 처리한 활성탄(Na-OAC)은 $HNO_3$만으로 처리한 활성탄(OAC)과 NaOH만으로 처리한 활성탄(Na-AC)에 비해 우수한 우라늄 흡착 성능을 나타내었다. 이와 같은 현상을 활성탄의 표면처리에 의한 표면 관능기 증가 및 용액의 pH 상승에 따른 효과로 설명할 수 있다. 따라서, $HNO_3$ 및 NaOH 용액을 이용하여 표면 처리한 활성탄을 이용한 우라늄 흡착 제거 공정에서는 용액 pH와 표면 처리에 의해 형성된 표면 관능기가 흡착 성능을 좌우하는 중요한 인자임을 알 수 있다.

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