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J Korean Soc Environ Eng > Volume 41(8); 2019 > Article
J Korean Soc Environ Eng 2019;41(8): 440-450. doi: https://doi.org/10.4491/KSEE.2019.41.8.440
원자력발전소 가상 중대사고시 방사선 환경영향 분석
Faith Rukundo, 김주열
한국전력국제원자력대학원대학교, 원자력산업학과
Radiological Environmental Consequence Analysis of Hypothetical Severe Accidents at Nuclear Power Plants
Faith Rukundo, Juyoul Kim
Department of NPP Engineering, KEPCO International Nuclear Graduate School
Corresponding author  Juyoul Kim ,Tel: 052-712-7306, Fax: 052-712-7375, Email: jykim@kings.ac.kr
Received: May 20, 2019;  Revised: July 22, 2019;  Accepted: July 29, 2019.  Published online: August 31, 2019.
ABSTRACT
Analysis of radiological environmental consequences for hypothetical severe accidents at Korean nuclear power plants (NPPs) was performed using radiological assessment system for consequence analysis (RASCAL) and hybrid single particle Lagrangian integrated trajectory (HYSPLIT) code. Through the benchmarking study of radiological source terms released to the atmosphere in case of Fukushima Daiichi NPP (FDNPP) accident, it was proved that the results of this study would fall within a reasonable range of the same order of magnitude compared with existing research results. Assuming a long-term station blackout (LTSBO) similar to FDNPP accident, we also analyzed the potential consequences of Shin Kori units 3 and unit 4 following postulated reactor core meltdown accidents which would lead to large releases of radioactive materials to the atmospheric environment and total source terms were estimated to be 4.1×1016 Bq. Korean regulatory standards of emergency management recommended immediate protective actions of sheltering-in-place and evacuation if the projected radiation doses to the population exceeded 10 mSv and 50 mSv in the first 2 days and 1 week after the accident, respectively. It was found that total effective dose equivalent (TEDE) ranged from 11 mSv at 4.83 km to 50 mSv at 1.61 km around Shin Kori NPPs and therefore urgent public protective actions should be implemented in case of an emergency.
Key Words: Nuclear Accident, Radiological Consequence, Source Term, Public Evacuation
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