Earticle

초록

영어

Background: This study evaluated the atmospheric dispersion of radioactive material according to local weather conditions and emission conditions. Materials and Methods: Local weather conditions were defined as 8 patterns that frequently occur around the Kori Nuclear Power Plant and emission conditions were defined as 6 patterns from a combination of emission rates and the total number of particles of the 137Cs, using the WRF/HYSPLIT modeling system. Results and Discussion: The highest mean concentration of 137Cs occurred at 0900 LST under the ME4_1 (main wind direction: SSW, daily average wind speed: 2.8 ms-1), with a wide region of its high concentration due to the continuous wind changes between 0000 and 0900 LST; under the ME3 (NE, 4.1 ms-1), the highest mean concentration of 137Cs occurred at 1500 and 2100 LST with a narrow dispersion along a strong northeasterly wind. In the case of ME4_4 (S, 2.7 ms-1), the highest mean concentration of 137Cs occurred at 0300 LST because 137Cs stayed around the KNPP under low wind speed and low boundary layer height. As for the emission conditions, EM1_3 and EM2_3 that had the maximum total number of particles showed the widest dispersion of 137Cs, while its highest mean concentration was estimated under the EM1_1 considering the relatively narrow dispersion and high emission rate. Conclusion: This study showed that even though an area may be located within the same radius around the Kori Nuclear Power Plant, the distribution and levels of 137Cs concentration vary according to the change in time and space of weather conditions (the altitude of the atmospheric boundary layer, the horizontal and vertical distribution of the local winds, and the precipitation levels), the topography of the regions where 137Cs is dispersed, the emission rate of 137Cs, and the number of emitted particles.

목차

ABSTRACT
 Introduction
 Materials and Methods
  1. Setting the local weather and emission conditions
  2. Forecast method for the dispersion of radioactive material outflow
 Results and Discussion
  1. Characteristics of atmospheric dispersion of radioactive materials by local weather conditions
  2. The characteristics of atmospheric dispersion of radioactive materials by emission conditions
 Conclusion
 Acknowledgment
 References

키워드

저자

• Hye Yeon An [ Division of Earth Environmental System, Pusan National University, Busan, Korea ]
• Yoon-Hee Kang [ The Institute of Environmental Studies, Pusan National University, Busan, Korea ]
• Sang-Keun Song [ Department of Earth and Marine Sciences, Jeju National University, Jeju, Korea ]
• Yoo-Keun Kim [ Department of Atmospheric Sciences, Pusan National University, Busan, Korea ] Corresponding author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  방사선방어학회지 [Journal of Radiation Protection and Research]

• 간기

  계간

• pISSN

  2508-1888

• 수록기간

  1976~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 559 DDC 629