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Background: This study analyzes the differences in the annual averaged atmospheric dispersion factor and ground deposition factor produced using two classification methods of atmospheric stability, which are based on a vertical temperature difference and the standard deviation of horizontal wind direction fluctuation. Materials and Methods: Daedeok and Wolsong nuclear sites were chosen for an assessment, and the meteorological data at 10 m were applied to the evaluation of atmospheric stability. The XOQDOQ software program was used to calculate atmospheric dispersion factors and ground deposition factors. The calculated distances were chosen at 400 m, 800 m, 1,200 m, 1,600 m, 2,400 m, and 3,200 m away from the radioactive material release points. Results and Discussion: All of the atmospheric dispersion factors generated using the atmospheric stability based on the vertical temperature difference were shown to be higher than those from the standard deviation of horizontal wind direction fluctuation. On the other hand, the ground deposition factors were shown to be same regardless of the classification method, as they were based on the graph obtained from empirical data presented in the Nuclear Regulatory Commission's Regulatory Guide 1.111, which is unrelated to the atmospheric stability for the ground level release. Conclusion: These results are based on the meteorological data collected over the course of one year at the specified sites; however, the classification method of atmospheric stability using the vertical temperature difference is expected to be more conservative.
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참고문헌 (9)
참고문헌 신청
U. S. Nuclear Regulatory Commission / 1977 / Methods for estimating atmospheric transport and dispersion of gaseous effluents in routine releases from light-water-cooled reactors / Regulatory Guide 1.111 :3~24
Sagendorf JF / 1982 / XOQDOQ computer program for meteorological evaluation of routine effluent releases at nuclear power stations :1~39
U. S. Nuclear Regulatory Commission / 2007 / Meteorological monitoring programs for nuclear power plants / Regulatory Guide 1.23revision 1 :2~13
Nuclear Safety and Security Commission / 2014 / Criteria for the investigation/evaluation regarding atmospheric condition on site of reactor facility / Notification No.2014-25 of the Nuclear Safety and Security Commission :7~15
Giblett MA / 1932 / The structure of wind over level country / Meteorological Office Geophysical Memoirs 54:1~119
Sagendorf JF / 1982 / XOQDOQ computer program for meteorological evaluation of routine effluent releases at nuclear power stations :1~39
U. S. Nuclear Regulatory Commission / 2007 / Meteorological monitoring programs for nuclear power plants / Regulatory Guide 1.23revision 1 :2~13
Nuclear Safety and Security Commission / 2014 / Criteria for the investigation/evaluation regarding atmospheric condition on site of reactor facility / Notification No.2014-25 of the Nuclear Safety and Security Commission :7~15
Giblett MA / 1932 / The structure of wind over level country / Meteorological Office Geophysical Memoirs 54:1~119
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