• 제목/요약/키워드: liquid waste

검색결과 581건 처리시간 0.026초

Simulation of the Migration of 3H and 14C Radionuclides on the 2nd Phase Facility at the Wolsong LILW Disposal Center

  • Ha, Jaechul;Son, Yuhwa;Cho, Chunhyung
    • 방사성폐기물학회지
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    • 제18권4호
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    • pp.439-455
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    • 2020

  • Numerical model was developed that simulates radionuclide (3H and 14C) transport modeling at the 2nd phase facility at the Wolsong LILW Disposal Center. Four scenarios were simulated with different assumptions about the integrity of the components of the barrier system. For the design case, the multi-barrier system was shown to be effective in diverting infiltration water around the vaults containing radioactive waste. Nevertheless, the volatile radionuclide 14C migrates outside the containment system and through the unsaturated zone, driven by gas diffusion. 3H is largely contained within the vaults where it decays, with small amounts being flushed out in the liquid state. Various scenarios were examined in which the integrity of the cover barrier system or that of the concrete were compromised. In the absence of any engineered barriers, 3H is washed out to the water table within the first 20 years. The release of 14C by gas diffusion is suppressed if percolation fluxes through the facility are high after a cover failure. However, the high fluxes lead to advective transport of 14C dissolved in the liquid state. The concrete container is an effective barrier, with approximately the same effectiveness as the cover.

  • https://doi.org/10.7733/jnfcwt.2020.18.4.439 인용 PDF KSCI

자동화된 Liquid Phase Microextraction(LPME)를 이용한 폐수 중 12종의 클로로페놀 분석 (Analysis of 12 chlorophenols in waste-water using automated liquid phase microextracion (LPME) device)

  • 김석중;조현우;명승운
    • 분석과학
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    • 제20권1호
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    • pp.70-77
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    • 2007

  • 클로로페놀 12종을 폐수로부터 LPME법을 사용하여 추출하였고, GC/MS로 분석하였다. 최적의 추출조건을 확립하기 위해 추출용매의 종류, 시료의 양, pH, 염석 효과, 플런저 왕복 횟수 및 속도를 고려하여 최적의 조건을 확립하였다. 그 결과, 직선성이 0.9913에서 0.9999를 가지는 12가지의 검정곡선을 얻을 수 있었고, 검출한계와 정량한계도 2,3,4,5-테트라클로로페놀과 펜타클로로페놀(0.05-500 ng/mL)을 제외하고 0.05~10.0 ng/mL범위에서 얻을 수 있었다. 실제 폐수에서 4-클로로-3-메틸페놀(784 ng/mL)을 확인할 수 있었다.

  • https://doi.org/10.5806/AST.2007.20.1.070 인용 PDF KSCI

Electrochemical Behaviors of Bi3+ Ions on Inert Tungsten or on Liquid Bi Pool in the Molten LiCl-KCl Eutectic

  • Kim, Beom Kyu;Park, Byung Gi
    • 방사성폐기물학회지
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    • 제20권1호
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    • pp.33-41
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    • 2022

  • Liquid Bi pool is a candidate electrode for an electrometallurgical process in the molten LiCl-KCl eutectic to treat the spent nuclear fuels from nuclear power plants. The electrochemical behavior of Bi3+ ions and the electrode reaction on liquid Bi pool were investigated with the cyclic voltammetry in an environment with or without BiCl3 in the molten LiCl-KCl eutectic. Experimental results showed that two redox reactions of Bi3+ on inert W electrode and the shift of cathodic peak potentials of Li+ and Bi3+ on liquid Bi pool electrode in molten LiCl-KCl eutectic. It is confirmed that the redox reaction of lithium with respect to the liquid Bi pool electrode would occur in a wide range of potentials in molten LiCl-KCl eutectic. The obtained data will be used to design the electrometallurgical process for treating actinide and lanthanide from the spent nuclear fuels and to understand the electrochemical reactions of actinide and lanthanide at liquid Bi pool electrode in the molten LiCl-KCl eutectic.

  • https://doi.org/10.7733/jnfcwt.2022.004 인용 PDF KSCI