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J Radiat Prot > Volume 37(3); 2012 > Article
Journal of Radiation Protection 2012;37(3):108-0.
doi: https://doi.org/10.14407/jrp.2012.37.3.108
METRO-K를 사용한 방사능으로 오염된 도시지역에서 대응행위효과 평가 : EMRAS II 도시오염평가분과 시나리오의 이행
황원태;정해선;정효준;김은한;한문희;
Evaluation of Countermeasures Effectiveness in a Radioactively Contaminated Urban Area Using METRO-K : The Implementation of Scenarios Designed by the EMRAS II Urban Areas Working Group
Hwang, Won-Tae;Jeong, Hae-Sun;Jeong, Hyo-Joon;Kim, Eun-Han;Han, Moon-Hee;
ABSTRACT
The Urban Areas Working Group within the EMRAS-2 ($underline{E}$nvironmental $underline{M}$odelling for $underline{RA}$diation $underline{S}$afety, Phase 2), which has been supported by the IAEA (International Atomic Energy Agency), has designed some types of accidental scenarios to test and improve the capabilities of models used for evaluation of radioactive contamination in urban areas. For the comparison of the results predicted from the different models, the absorbed doses in air were analyzed as a function of time following the accident with consideration of countermeasures to be taken. Two kinds of considerations were performed to find the dependency of the predicted results. One is the 'accidental season', i.e. summer and winter, in which an event of radioactive contamination takes place in a specified urban area. Likewise, the 'rainfall intensity' on the day of an event was also considered with the option of 1) no rain, 2) light rain, and 3) heavy rain. The results predicted using a domestic model of METRO-K have been submitted to the Urban Areas Working Group for the intercomparison with those of other models. In this study, as a part of these results using METRO-K, the countermeasures effectiveness in terms of dose reduction was analyzed and presented for the ground floor of a 24-story business building in a specified urban area. As a result, it was found that the countermeasures effectiveness is distinctly dependent on the rainfall intensity on the day of an event, and season when an event takes place. It is related to the different deposition amount of the radionuclides to the surfaces and different behavior on the surfaces following a deposition, and different effectiveness from countermeasures. In conclusion, a selection of appropriate countermeasures with consideration of various environmental conditions may be important to minimize and optimize the socio-economic costs as well as radiation-induced health detriments.
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