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Kusakabe, Kazuaki*; Watanabe, Masanori; Nishiuchi, Masashi*; Yamasaki, Takuhei*; Inoue, Hiromi*
Kankyo Hoshano Josen Gakkai-Shi, 11(1), p.15 - 23, 2023/03
The spread of radioactive materials caused by the Fukushima Daiichi Nuclear Power Plant accident that occurred in March 2011 contaminated a wide area that includes Fukushima Prefecture. Although air dose rates in Fukushima Prefecture have been steadily decreasing because of decontamination and the physical decay of radioactive materials, it is important to confirm the sustainability of decontamination effects in living areas and to predict future trends in air dose rates to reassure residents who are concerned regarding radiation exposure. This report aims to confirm the sustainability of the decontamination effects in public facilities after decontamination on a continuous and detailed basis, and to verify whether the future transition in air dose rates can be predicted using existing model. The air dose rates in public facilities after decontamination were measured via fixed-point and walking surveys, and the changes in air dose rates were clarified quantitatively for each facility. The measured values were compared with values obtained using existing model, and prediction accuracy was considered. The results showed that there was no evident recontamination after decontamination at any of the surveyed facilities, indicating that the decontamination effects were sustained. It was also confirmed that future trends in air dose rates at the facilities after decontamination could be accurately predicted by existing model. Key words: air dose rate, decontamination, future prediction, public facilities.
Saito, Kimiaki
Genshiryoku No Ima To Ashita, p.148 - 151, 2019/03
no abstracts in English
Miyahara, Kaname
no journal, ,
This presentation focuses on JAEA's R&D for enhancing Fukushima environmental recovery to address the needs for better scientific and technological capabilities to assess, predict, and minimize the impact of radiological contamination and illustrate how to enhance the understanding of radiation and associated risks in the public.
Miyahara, Kaname
no journal, ,
This presentation focuses on JAEA's R&D for enhancing Fukushima off-site environmental recovery to address the needs for better scientific and technological capabilities to assess, predict, and minimize the impact of radiological contamination and illustrate how to enhance the understanding of radiation and associated risks in the public. Application of methods and technologies obtained by these R&D to on-site issues is also illustrated.