TY - JOUR

T1 - Radioactive Games?

T2 - Radiation Hazard Assessment of the Tokyo Olympic Summer Games

AU - Shozugawa, Katsumi

AU - Steinhauser, Georg

AU - Querfeld, Rebecca

AU - Hori, Mayumi

AU - Weller, Anica

AU - Degering, Detlev

N1 - ACKNOWLEDGMENTS The research conducted in Japan was funded by donations fromJapanese citizens. These microfunds were spent for domestictravel to the venues. The time, international travel, instrumenta-tion, and materials used for this study were paid for by ourinstitutions and not funded by external organizations.

PY - 2020/9/15

Y1 - 2020/9/15

N2 - We conducted a comprehensive radiation hazard assessment of the Tokyo Olympic Games (Tokyo 2020, postponed to 2021). Our combined experimental and literature study focused on both external and internal exposure to ionizing radiation for athletes and visitors of the Games. The effective dose for a visit of 2 weeks ranges from 57 to 310 μSv (including flight dose). The main contributors to the dose are cosmic radiation during the flights (approximately 10-81%), inhalation of natural radon (approximately 9-47%), and external exposure (approximately 8-42%). In this complex exposure, anthropogenic radionuclides from the Fukushima nuclear accident (2011) always play a minor role and have not caused a significant increase of the radiological risk compared to pre-Fukushima Japan. Significantly elevated air dose rates were not measured at any of the Tokyo Olympic venues. The average air dose rates at the Tokyo 2020 sites were below the average air dose rates at the sites of previous Olympic Games. The level of radiological safety of foods and water is very high in Japan, even for athletes with increased water and caloric demands, respectively.

AB - We conducted a comprehensive radiation hazard assessment of the Tokyo Olympic Games (Tokyo 2020, postponed to 2021). Our combined experimental and literature study focused on both external and internal exposure to ionizing radiation for athletes and visitors of the Games. The effective dose for a visit of 2 weeks ranges from 57 to 310 μSv (including flight dose). The main contributors to the dose are cosmic radiation during the flights (approximately 10-81%), inhalation of natural radon (approximately 9-47%), and external exposure (approximately 8-42%). In this complex exposure, anthropogenic radionuclides from the Fukushima nuclear accident (2011) always play a minor role and have not caused a significant increase of the radiological risk compared to pre-Fukushima Japan. Significantly elevated air dose rates were not measured at any of the Tokyo Olympic venues. The average air dose rates at the Tokyo 2020 sites were below the average air dose rates at the sites of previous Olympic Games. The level of radiological safety of foods and water is very high in Japan, even for athletes with increased water and caloric demands, respectively.

UR - http://www.scopus.com/inward/record.url?scp=85091125319&partnerID=8YFLogxK

U2 - 10.1021/acs.est.0c02754

DO - 10.1021/acs.est.0c02754

M3 - Article

C2 - 32835480

AN - SCOPUS:85091125319

VL - 54

SP - 11414

EP - 11423

JO - Environmental Science and Technology

JF - Environmental Science and Technology

SN - 0013-936X

IS - 18

ER -