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KMID : 0364920130380040208
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Journal of Radiation Protection and Research
2013 Volume.38 No. 4 p.208 ~ p.213
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Field Tracer Experiments under Severe Wether Conditions for the Validation of the Dispersion of Radioactive Materials
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Han Moon-Hee
Kim Eun-Han
Jeong Hyo-Joon
Jeong Hae-Sun
Park Mi-Sun
Hwang Won-Tae
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Abstract
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The suitability of the site criteria is a basic requirement for securing safety of nuclear power plants. The suitability should be confirmed through the estimation of environmental radiation effects at the exclusion area boundary under the severe weather conditions. In this study, field tracer experiments over short range of 1 km radius under severe weather conditions were conducted at flat area in Daejeon. Severe weather conditions are represented with stable atmospheric condition and low wind speed. In general, the condition is appeared at clean night time with weak wind. The analysis of the measured distribution of the released tracer gas shows two big differences between the results of the past experiments conducted under the favorable weather conditions. One is the difficulty of finding the typical distribution of the released tracer gas with peak concentration in the downwind direction. The other one is the appearance of the contour of the concentration of tracer gas at several hundred meters even though the gas released at 10 m height over the ground.
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KEYWORD
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Radioactive material, Site suitability, Atmospheric dispersion model, Radiation environmental effects, Field tracer experiment, Severe weather condition
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