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논문 기본 정보

자료유형
학술저널
저자정보
Kim, Cheol-Su (Korea Institute of Nuclear Safety) Lee, Sang-Kuk (Korea Institute of Nuclear Safety) Lee, Dong-Myung (Korea Institute of Nuclear Safety) Choi, Seok-Won (Korea Institute of Nuclear Safety)
저널정보
대한방사선방어학회 방사선방어학회지 방사선방어학회지 제44권 제3호
발행연도
2019.1
수록면
118 - 126 (9page)

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Background: Government conducts environmental radioactivity surveillance for verification purpose around nuclear facilities based on the Nuclear Safety Law and issues a surveillance report every year. This study aims to evaluate the short and the long-term fluctuation of radionuclides detected above MDC and their origins using concentration ratios between these radionuclides. Materials and Methods: Sample media for verification surveillance are air, rainwater, groundwater, soil, and milk for terrestrial samples, and seawater, marine sediment, fish, and seaweed for marine samples. Gamma-emitting radionuclides including $^{137}Cs$, $^{90}Sr$, Pu, $^3H$, and $^{14}C$ are evaluated in these samples. Results and Discussion: According to the result of the environmental radioactivity verification surveillance in the vicinity of nuclear power facilities in 2017, the anthropogenic radionuclides were not detected in most of the environmental samples except for the detection of a trace level of $^{137}Cs$, $^{90}Sr$, Pu, and $^{131}I$ in some samples. Radioactivity concentration ratios between the anthropogenic radionuclides ($^{137}Cs/^{90}Sr$, $^{137}Cs/^{239+240}Pu$, $^{90}Sr/^{239+240}Pu$) were similar to those reported in the environmental samples, which were affected by the global fallout of the past nuclear weapon test, and Pu atomic ratios ($^{240}Pu/^{239}Pu$) in the terrestrial sample and marine sample showed significant differences due to the different input pathway and the Pu source. Radioactive iodine ($^{131}I$) was detected at the range of < $5.6-190mBq{\cdot}kg-fresh^{-1}$ in the gulfweed and sea trumpet collected from the area of Kori and Wolsong intake and discharge. A high level of $^3H$ was observed in the air (Sangbong: $0.688{\pm}0.841Bq{\cdot}m^{-3}$) and the precipitation (Meteorology Post: $199{\pm}126Bq{\cdot}L^{-1}$) samples of the Wolsong nuclear power plant (NPP). $^3H$ concentration in the precipitation and pine needle samples showed typical variation pattern with the distance and the wind direction from the stack due to the gaseous release of $^3H$ in Wolsong NPP. Conclusion: Except for the detection of a trace level of $^{137}Cs$, $^{90}Sr$, Pu, and $^{131}I$ in some samples, anthropogenic radionuclides were below MDC in most of the environmental samples. Overall, no unusual radionuclides and abnormal concentration were detected in the 2017's surveillance result for verification. This research will be available in the assessment of environment around nuclear facilities in the event of radioactive material release.
#Environmental Radioactivity #Anthropogenic Radionuclides #Radioactivity Concentration #Normal Fluctuating Range #Radioactivity Concentration Ratio

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참고문헌 (22)

참고문헌 신청
International Atomic Energy Agency / 2014 / Radiation Protection and Safety of Radiation Sources: International Basic Safety Standards / IAEA GSR Part 3 google schola International Atomic Energy Agency / 2005 / Environmental and Source Monitoring for Purposes of Radiation Protection google schola International Atomic Energy Agency / 2010 / Programmes and systems for Source and Environmental Radiation Monitoring google schola Notice of the Nuclear Safety and Security / 2017 / Regulation on Survey of Radiation Environment and Assessment of Radiological Impact on Environment in Vicinity of Nuclear Power Utilization Facilities / Notice of the Nuclear Safety and Security Commission no. 2017-17 google schola Health Canada / 2001 / Environmental Radioactivity in Canada 1997–2009 google schola

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