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Assessment of Environmental Radioactivity Surveillance Results around Korean Nuclear Power Utilization Facilities in 2017

  • 투고 : 2019.05.08
  • 심사 : 2019.06.20
  • 발행 : 2019.09.30

초록

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.

키워드

참고문헌

  1. International Atomic Energy Agency. Radiation Protection and Safety of Radiation Sources: International Basic Safety Standards. IAEA GSR Part 3, 2014.
  2. International Atomic Energy Agency. Environmental and Source Monitoring for Purposes of Radiation Protection. IAEA RS-G-1.8. 2005.
  3. International Atomic Energy Agency. Programmes and systems for Source and Environmental Radiation Monitoring. IAEA Safety Reports Series No. 64. 2010.
  4. Notice of the Nuclear Safety and Security. Notice of the Nuclear Safety and Security Commission no. 2017-17: Regulation on Survey of Radiation Environment and Assessment of Radiological Impact on Environment in Vicinity of Nuclear Power Utilization Facilities. 2017.
  5. Health Canada, Environmental Radioactivity in Canada 1997-2009. 2001.
  6. Radiation Monitoring Technical Center. Annual Report of the National Radiation Environment. 2018.
  7. Korea Institute of Nuclear Safety. The Annual Report on the Environmental Radiological Surveillance and Assessment around the Nuclear Facilities. KINS/AR-140. 2017;28.
  8. Korea Institute of Nuclear Safety. Environmental Radioactivity Survey in Korea. KINS/ER-028. 2017;49.
  9. Korea Institute of Nuclear Safety. Marine Environmental Radioactivity Survey. KINS/ER-092. 2010;6.
  10. International Atomic Energy Agency. Handbook of Parameter Values for the Prediction of Radionucilde Transfer to Wildlife. IAEA-TECODC-479. IAEA. Vienna. 2014.
  11. Korea Institute of Nuclear Safety. Marine Environmental Radioactivity Survey. KINS/ER-092. 2017;13.
  12. Kelley JM, Bond LA, Beasley TM. Global distribution of Pu isotopes and 237Np. Sci. of the Total Environ. 1999;237-238:483-500. https://doi.org/10.1016/S0048-9697(99)00160-6
  13. Kim CK, Kim CS, Chang BU, Choi SW, Chung CS, Hong GH, Hirose K, Igarashi Y. Pu isotopes in seas around the Korean Peninsula. Sci. Total Environ. 2004;318:197-209. https://doi.org/10.1016/S0048-9697(03)00399-1
  14. Kim CK, Kim CS, Chang BU, Choi SW, Chung CS, Hong GH, Hirose K, Pettersson HBL. $^{240}$Pu/$^{239}$Pu atom ratios in the bottom sediments of the NW Pacific Ocean. J. Radioanal Nucl Chem. 2003;258(2):265-268. https://doi.org/10.1023/A:1026225402410
  15. Hirose K, Aoyama M, Kim CS, Kim CK, Povinec PP. Plutonium isotopes in seawater of the North Pacific. 2006;8:67-82.
  16. Korea Institute of Nuclear Safety. Nationwide Surveillance on the Environmental Radiation, KINS/RR-937. 2012:121-122.
  17. Korea Institute of Nuclear Safety. The Annual Report on the Environmental Radiological Surveillance and Assessment around the Nuclear Facilities. KINS/AR-140. 2011;22:40-43.
  18. International Atomic Energy Agency. Criteria for Radionuclide Activity Concentrations for Food and Drinking Water. IAEATECODC-1788. IAEA. Vienna. 2016.
  19. Kim CS, Lee MH, Kim CK, Kim KH. $^{90}$Sr, $^{137}$Cs, $^{239+240}$Pu and $^{238}4Pu Concentrations in Surface Soils of Korea. J. Environ. Radioactivity. 1998;40:75-88. https://doi.org/10.1016/S0265-931X(97)00062-3
  20. Choi SW, Jin HG, Kim CS, Row JW, Kim CK, Rho BH. The Distribution of $^{137}$Cs, $^{90}$Sr and Pu isotopes in the Coastal Sediment of Korea. J. Korean Association for Radiation Protection. 2002;27(2): 101-110.
  21. Hirose K, et al. Anthropogenic radionuclides in seawater in the East Sea/Japan Sea: Results of the first-stage Japanese-Korean-Russian expedition, J. Environ. Radioactivity. 1999;43:1-13. https://doi.org/10.1016/S0265-931X(98)00012-5
  22. Ikeuchi Y, et al. Anthropogenic radionuclides in seawater of the Far Eastern Seas. Sci. of the Total Environ. 1999;237-238:203-212. https://doi.org/10.1016/S0048-9697(99)00136-9

피인용 문헌

  1. Impact on Fisheries in Contaminated Water Discharged from Nuclear Power and Reprocessing Plants: The Cases of La Hague Reprocessing Plant, Sellafield Nuclear Fuel Reprocessing Plant, and TEPCO Fukushi vol.16, pp.5, 2019, https://doi.org/10.20965/jdr.2021.p0840