Database for Radioactive Substance Monitoring Data
Japan Atomic Energy Agency (JAEA) collects and discloses the results of measurement of air dose rates in Fukushima Prefecture and neighboring prefectures due to the accident at TEPCO's Fukushima Daiichi NPP, which are disclosed by the Nuclear Regulation Authority and Fukushima Prefecture, etc., as well as the results of analysis of radioactive materials in land soil (soil surface and in soil), sea area (sea water, sea bottom soil), rivers (river water, river bottom soil) and underground water, food (agricultural, forestry, livestock, marine products, etc.). The results are made public so that users can intuitively grasp the situation by visualizing the large volume of data.
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It may take longer time to display airborne surveys due to the large number of the registered data.
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Measured air dose rate data, i.e. the amount of radiation per unit time in the air (Air absorbed dose rates[nGy/h], or ambient dose equivalent rate[μSv/h]). The air dose rate is continuously observed around the nuclear facilities to detect abnormality including radioactive substances leakage.
In order to confirm the condition in the depth distribution of radioactive cesium comprehensively mainly within a 80 km radius of the Fukushima Dai-ichi NPP, we collected soil samples at various depths using a scraper plate which is the standard method to measure radioactive nuclides in soil profiles employed at IAEA and researched the depth distribution of radioactive cesium.
Measured data of radioactive substances released to the environment by Fukushima Daiichi NPP accident in seawater.
Measured data of radioactive substances released to the environment by Fukushima Daiichi NPP accident in marine soil.
Measured data of radioactive concentration deposited on the surface soil after TEPCO's FDNPP accident.
Measured data of radioactive substances released to the environment by Fukushima Daiichi NPP accident including ground deposition, radioactive concentration of soil sample and environmental sample, and radioactive substance depth distribution.
Measured data of radioactive substances in the Atomosphere Dust (floating).
Measured data of radioactive substances in the Atmosphere Dust (fallout) and rainfall.
Measured data of radioactive substances in the water including river water and lake water.
Measured data of River Bottom Sediment Quality, Environment around the river, and Rivers Suspended Sediment.
Data of radioactive substances measured to maintain our safety and security of drinking water.
Data of radioactive substances measured to maintain our safety and security of Wild Birds and Animals.
Measured data of the radioactive cesium on the bottom of the sea by ship towing monitoring.
Data of radioactive substances measured to maintain our safety and security of food including agricultural products, livestock products, fishery products, and processed food.
Updates All Updates
The following survey results have been revised.
・Radioactive Concentration-DepositionーAirborne MonitoringーSurface deposition of iodine-131 released by the Fukushima Daiichi Nuclear Power Plant accident
The following new contents have been released.
・Air Dose RateーVehicle-borne SurveyーPatterns of daily activities (Vehicle-borne Survey)
・Air Dose RateーWalk-borne SurveyーPatterns of daily activities (Walk-borne Survey)
・Radioactive Concentration-DepositionーAirborne MonitoringーSurface deposition of iodine-131 released by the Fukushima Daiichi Nuclear Power Plant accident
The 2022 survey results have been added to the following survey results.
・Radioactive Concentration-Game Meat and Aquatic organismーMonitoring Results of Aquatic Organisms (Aquatic Organisms)
・Radioactive Concentration-Game Meat and Aquatic organismーMonitoring Results of Aquatic Organisms (Aquatic Organisms - Sea)
The survey results up to September, 2023 have been added to the survey results below.
・Radioactive Concentration-Game Meat and Aquatic organismーAquatic organismーReadings of the Monitoring on Radioactivity Level in Fisheries Products by Fisheries Agency
The survey results up to July, 2023 have been added to the survey results below.
・Radioactive Concentration-SeawaterーSeawaterーDistribution of Radioactivity Concentration in the Seawater around Fukushima Dai-ichi NPP by TEPCO
・Radioactive Concentration-SeawaterーSeawaterーReadings of Sea Area Monitoring (Seawater) by NRA
The 2022 survey results have been added to the following survey results.
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーSurvey Results of Environmental Radioactivity Level in the National Forests in Fukushima Prefecture
・Radioactive Concentration-SeawaterーSeawaterーResults of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Sea Water)
・Radioactive Concentration-Marine SoilーMarine SoilーResults of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Marine Soil)
・Radioactive Concentration-SeawaterーSeawaterーMonitoring Results of Seawater in Public Water Areas by MOE
・Radioactive Concentration-Marine SoilーMarine SoilーMonitoring Results of Sediment in Public Water Areas by MOE
This is the Database for Radioactive Substance Monitoring Data renewed and released on October 1, 2021. Click here for the old site.