미세조류를 이용한 사용후핵연료 저장조에서 배출되는 방사성 폐액에 함유된 Cs-137 및 Sr-90 제염에 관한 연구
A Study on the Decontamination of Cs-137 and Sr-90 Contained in the Liquid Radioactive Waste Discharged from the Spent Fuel Storage Tank Using Microalgae
0
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
본 연구에서는 방사성 폐액내 포함된 방사성 핵종인 세슘-137(Cs-137) 및 스트론튬-90(Sr-90)의 친환경적인 제염을 위해 미세조류의적용 가능성을 평가하였다. Cs-137 및 Sr-90이 각각 함유된 일원계 표준 방사성 용액과 3차 증류수를 희석하여 1.5 Bq/mL Cs-137, 1.0 Bq/mL Sr-90 농도로 제조한 뒤 실험에 사용하였다. 미세조류는 2종을 사용했으며, Sr-90 제염에는 Chlorella Vulgaris를 사용하였고, Cs-137 제염에는 Hematococcus pluvialis를 사용하여 실험을 수행하였다. 실험 방법은 2주 간 배양된 미세조류를 반투과막이 부착된 병에 투입한 뒤, 미세조류가 투입된 병을 제조된 방사성 용액에 투입하여, 반투과막을 통해 미세조류와 방사성 용액이 48 시간 동안 반응하도록 하였다. 각 시료에 대한 방사능 농도 분석은 γ선 동위원소인 Cs-137은 감마선 핵종 분석기를 사용하였고, β선 동위원소인 Sr-90은액체섬광계수기(LSC: Liquid Scintillation Count)를 사용하였다. 실험 결과, Cs-137은 약 88.0 %, Sr-90은 약 89.7 % 제염이 가능함을 확인하였으며, Sr-90은 2단 제염 방법에 의해 최종적으로 약 98.6 % 제염이 가능하였다.
Abstract
In this study, the applicability of microalgae was evaluated for eco-friendly decontamination of cesium-137 (Cs-137) and strontium-90 (Sr-90), which are radioactive nuclides contained in radioactive waste. The monolithic radioactive solution used in the experiment was manufactured at a concentration of 1.5 Bq/mL Cs-137 and 1.0 Bq/mL Sr-90 by diluting a standard radioactive solution and distilled water. This experiment used two types of microalgae, Chlorella Vulgaris was used for Sr-90 decontamination and Hematococcus pluvialis for Cs-137 decontamination. The experimental method is to put the microalgae cultured for 2 weeks into a bottle with a semi-permeable membrane, and then put the bottle in which the microalgae was put into the manufactured radioactive solution, so that the microalgae and the radioactive solution react through the semi-permeable membrane for 48 hours. For the radioactivity concentration analysis of each sample, a gamma-ray nuclide analyzer was used for Cs-137, a γ -ray i sotope, and a Liquid S cintillation Count(LSC) w as u sed f or Sr-90, a β -ray i sotope. As a r esult of the experiment, it was confirmed that about 88.0 % of Cs-137 and about 89.7 % of Sr-90 could be decontaminated, and about 98.6 % of Sr-90 was finally able to be decontaminated by the two-stage decontamination method.
참고문헌 (12)
- Yan Xu, "The prospective of Nuclear Power in China", Sustainablity, pp.10~ (2018)
- Firoz Alam, "Nuclear power plants in emerging economies and human resource development : A reiew", Energy Procedia, pp.3~10 (2019)
- A Study on the Nuclear Policy & Economic Analysis of Nuclear Energy, "KAERI", Korea Atomic Energy Research Institute, ~ (2005)
- "Public Data Portal" (2022)[URL]
- Gye Nam Kim, "Decontamionation of Soil Contaminated with Cesium Using Electrokinetic-electrodialytic Method", Electrochimica Acta, pp.233~237 (2015)
- Use of evaporation for the treatment of liquids in the nuclear industry, "Godbee, H. W", Oak Ridge National Lab, ~ (1973)
- Ahmet E. Osmanlioglu, "Decontamination of radioactive wastewater by two-staged chemical precipitation", Nuclear Engineering and Technology, 50(6), pp.886~889 (2018), 한국원자력학회
- Marina Palamarchuk, "Decontamination of spent ion-exchangers contaminated with cesium radionuclides using resorcinol-formaldehyde resins", Journal of Hazadous Materials, pp.326~334 (2017)
- Development of the UREX+ co-decontamination solvent extraction process, "Emory D. Collins", Nuclear Chemistry Solvent Extraction, ~ (2003)
- F. D. Menozz, "Absorption method for rapid decontamination of solutions of ethidium bromide and propidium iodide", Chromatographia, pp.167~169 (1990)
- Keun Young Lee, "Biosorption of Radioactive cesium from contaminated water by microalgae Haematococcus pluvialis and Chlorella vulgaris", Journal of Environmental Management, 233(1), pp.83~88 (2019)
- Bo Ram Kim, "Optimization of microalgae (tetraselmis chui, Dunaliella tertiolecta, Nannochloropsis oculata) culutre conditions for biodiesel production", pp.2012