방사성폐기물학회지 (Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT))

  • 제21권1호
  • /
  • Pages.95-114
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  • 2023
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  • 1738-1894(pISSN)
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  • 2288-5471(eISSN)
한국방사성폐기물학회 (Korean Radioactive Waste Society)
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Radiation Distribution Around Fukushima Daiichi Nuclear Power Station Decade After the Accident

  • Yukihisa Sanada (Sector of Fukushima Research and Development, Japan Atomic Energy Agency) ;
  • Miyuki Sasaki (Sector of Fukushima Research and Development, Japan Atomic Energy Agency) ;
  • Hiroshi Kurikami (Sector of Fukushima Research and Development, Japan Atomic Energy Agency) ;
  • Fumiya Nagao (Sector of Fukushima Research and Development, Japan Atomic Energy Agency) ;
  • Satoshi Mikami (Sector of Nuclear Safety Research and Emergency Preparedness, Japan Atomic Energy Agency)
  • 투고 : 2022.07.21
  • 심사 : 2022.11.04
  • 발행 : 2023.03.31
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초록

During the decades after the Fukushima Daiichi Nuclear Power Station (FDNPS) accident, ambient dose rates have markedly decreased when compared to those at the early state of the accident. Government projects have been continuously conducted by surveying the ambient dose rate and radiocesium distributions. Airborne surveys using crewed helicopters and unmanned aerial vehicles (UAVs) are the best methods for obtaining an overall picture of the distribution. However, ground-based surveys are required for accurate measurements near the population. The differences between these methods include the knowledge of the post depositional behavior of radionuclides in land use. The survey results form the basis for policy decisions such as lifting evacuation zones, decontamination, and other countermeasures. These surveys contain crucial findings regarding post-accident responses. This paper reviews the survey methods of government projects and current situation around the FDNPS. The visualization methods and databases of ambient dose rates are also reviewed to provide information to the population.

키워드

과제정보

This study was performed as part of the mapping project and the airborne survey project funded by the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) and the Nuclear Regulation Authority, Japan.

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