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http://dx.doi.org/10.14407/jrp.2012.37.3.116

Influence of Statistical Compilation of Meteorological Data on Short-Term Atmospheric Dispersion Factors in a Hypothetical Accidental Release of Nuclear Power Plants  

Hwang, Won-Tae (Korea Atomic Energy Research Institute)
Kim, Eun-Han (Korea Atomic Energy Research Institute)
Jeong, Hae-Sun (Korea Atomic Energy Research Institute)
Jeong, Hyo-Joon (Korea Atomic Energy Research Institute)
Han, Moon-Hee (Korea Atomic Energy Research Institute)
Publication Information
Journal of Radiation Protection and Research / v.37, no.3, 2012 , pp. 116-122 More about this Journal
Abstract
A short-term atmospheric dispersion factor (${\chi}/Q$) is an essential element for radiological dose assessment following a hypothetical accidental releases of light-water nuclear power plants. The U. S. NRC developed PAVAN program to comply with the U. S. NRC's Regulatory Guide 1.145. Meteorological data is an essential element for atmospheric dispersion, and PAVAN uses a joint frequency distribution data, which represents the occurrence probability of wind speed and wind direction for atmospheric stability. Using the meteorological data measured at Kori and Wolsung sites for the last 5 years (from 2006 to 2010), a variety of joint frequency distribution data were prepared to evaluate ${\chi}/Q$ values with different wind speed classifications (U. S. NRC's recommendation and even distribution of occurrence probability) and periods of meteorological data to be analyzed (1 year, 2 year, 3 year, 4 year, 5 year). As a result, it was found that the influence of the wind speed classification on ${\chi}/Q$ values is little, while the influence of the periods of meteorological data to be analyzed is relatively significant, representing more than 1.5 times in the ratio of maximum to minimum values.
Keywords
Hypothetical accident; Short-term atmospheric dispersion factor; Joint frequency distribution data; PAVAN;
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  • Reference
1 U. S. Nuclear Regulatory Commission (NRC). Atmospheric dispersion models for potential accident consequence assessments at nuclear power plants. Regulatory guide 1.145 revision 1. 1979.
2 U. S. Nuclear Regulatory Commission (NRC). PAVAN: An atmospheric dispersion program for evaluating design basis accidental releases of radioactive materials from nuclear power stations. NUREG/CR-2858. PNL-4413. 1982.
3 원자력안전위원회. 원자력시설 부지의 기상조건에 관한 조사.평가 기준. 원자력안전위원회고시 제2011- 19호. 2011.
4 International Atomic Energy Agency. Generic models for use in assessing the impact of discharges of radioactive substances to the environment. Safety reports series No. 19. 2001.
5 U. S. Nuclear Regulatory Commission (NRC). Onsite meteorological measurements program. NUREG- 0800 revision 3. 2007.
6 International Atomic Energy Agency. Dispersion of radioactive material in air and water and consideration of population distribution in site evaluation for nuclear power plants. IAEA safety standards series No. NS-G-3.2. 2002.
7 U. S. Nuclear Regulatory Commission (NRC). Meteorological monitoring programs for nuclear power plants. Regulatory guide 1.23 revision 1. 2007.