4:50 PM - 5:05 PM
[1E16] Assessment of Core Status of TEPCO's Fukushima Daiichi Nuclear Power Plants
(98)Discussion in the accident progression behavior in the early stage of the Unit 1 accident based on dose rate data
Keywords:Fukushima Daiichi NPS accident, Dose rate data, Accident progression
Dose rate data inside and outside the site was measured by a monitering car in the site and monitering posts around the site during the Fukushima Daiichi NPS accident. Focusing attention on direct and Sky-shine radiation from radioactive materials released to the reactor building and Cloud-shine radiation from radioactive cloud released from the building, based on the measured dose rate data, the accident progression behavior in the early stage of the Unit-1 accident was discussed.