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.
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.
Data of radioactive substances measured to waste, sewage sludge, etc. contaminated by radioactive materials.
Updates All Updates
The survey results have been added to the following measurement items.
・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-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 survey results have been added to the following measurement items.
・Air Dose RateーVehicle-borne SurveyーVehicle-borne Survey Conducted by TEPCO
・Radioactive Concentration-SeawaterーSeawaterーResults of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Sea Water)
・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Monitoring Results of Sea Area related to ALPS-treated water (Seawater) by MOE
・Radioactive Concentration-Marine SoilーMarine SoilーReinforcement of Monitoring in Fukushima Daiichi Nuclear Power Station Peripheral Sea Area (Marine Soil)
The survey results have been added to the following measurement items.
・Radioactive Concentration-Atmosphere Dust (floating)ーAtmosphere Dust (floating)ーReadings of Dust Sampling in 20km Zone of TEPCO Fukushima Dai-ichi NPP
・Radioactive Concentration-Atmosphere Dust (floating)ーAtmosphere Dust (floating)ーReadings of Atmosphere Dust Sampling by NRA and Fukushima Prefecture
・Radioactive Concentration-Atmosphere Dust (fallout)ーMonthly FalloutーReading of Environmental Radioactivity Level by Prefecture (Monthly Fallout)
・Radioactive Concentration-SeawaterーSeawaterーResults of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Sea Water)
・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Monitoring Results of Seawater monitoring in Tokyo Bay by MLIT
・Radioactive Concentration-Marine SoilーMarine SoilーReinforcement of Monitoring in Fukushima Daiichi Nuclear Power Station Peripheral Sea Area (Marine Soil)
This is the Database for Radioactive Substance Monitoring Data renewed and released on October 1, 2021. Click here for the old site.