DOI QR코드

DOI QR Code

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

METRO-K를 사용한 방사능으로 오염된 도시지역에서 대응행위효과 평가 : EMRAS II 도시오염평가분과 시나리오의 이행

  • Received : 2012.05.11
  • Accepted : 2012.06.29
  • Published : 2012.09.30

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.

Acknowledgement

Supported by : 교육과학기술부

References

  1. http://www-ns.iaea.org/projects/emras/emras2.
  2. 황원태, 김은한, 정효준, 서경석, 한문희. 도시환경에서 방사성물질의 오염평가 모델개발. Journal of Radiation Protection. 2005;30(3):99-105.
  3. 황원태, 김은한, 정효준, 서경석, 한문희, 도시환경에서 방사성물질 오염에 따른 선량평가모델. Journal of Radiation Protection. 2007;32(1):1-8.
  4. Charnock T, Adersson K. Source of information on urban recovery countermeasures for use in models. Draft report for the preparation of IAEA safety report series. 2006.