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 2022 survey results have been added to the following survey results.
・Air Dose RateーVehicle-borne SurveyーVehicle-borne Survey Conducted by TEPCO
The survey results up to March, 2022 have been added to the survey results below.
・Radioactive Concentration-SeawaterーSeawaterーReinforcement of Monitoring in Fukushima Daiichi Nuclear Power Station Peripheral Sea Area (Seawater)
The survey results up to March, 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 following survey results have been revised.
・Radioactive Concentration-SeawaterーSeawaterーResults of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Sea Water)
The following new contents have been released.
・Air Dose RateーAirborne MonitoringーRadiation Distribution Measurements at a Riverbed Using an Unmanned Helicopter
・Air Dose RateーAirborne MonitoringーBoundary monitoring of 5 mSv/year in the evacuation zone and planned evacuation zone, etc. (unmanned helicopter)
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーBoundary monitoring of 5 mSv/year (ground measurement) in the warning zone and planned evacuation zone, etc.
The 2022 survey results have been added to the following survey results.
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーAir Dose Rate Readings out of 20 km Zone of Fukushima Dai-ichi NPP
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーReadings of Accumulated Dose outside the 20 km Zone of TEPCO Fukushima Dai-ichi NPP (Measured by Glass Badge Dosimeter)
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーAir Dose Rate Readings inside the 20 km Zone of Fukushima Dai-ichi NPP
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーReadings of Accumulated Dose by The Federation of Electric Power Companies of Japan (Member Companies)
・Radioactive Concentration-Soil / Environment Sample AnalysisーSoil / Environment Sample AnalysisーResults of the Monitoring of Soil Samples
・Radioactive Concentration-Soil / Environment Sample AnalysisーSoil / Environment Sample AnalysisーReadings of Soil Monitoring in 20km Zone of TEPCO Fukushima Dai-ichi NPP
・Radioactive Concentration-Soil / Environment Sample AnalysisーSoil / Environment Sample AnalysisーResults of the Monitoring of Environmental Monitoring Samples
・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
・Radioactive Concentration-Marine SoilーMarine SoilーDistribution of Radioactivity Concentration in the Marine Soil around Fukushima Dai-ichi NPP by TEPCO
・Radioactive Concentration-Marine SoilーMarine SoilーReadings of Sea Area Monitoring (Marine Soil) by NRA
・Radioactive Concentration--Drinking WaterーDrinking WaterーReadings of Radioactivity Level in Drinking Water by Prefecture
・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 2022 survey results have been added to the following survey results.
・Air Dose RateーAirborne MonitoringーUnmanned Helicopter Monitoring in the Distribution Survey of Radioactive Substances
・Air Dose RateーAirborne MonitoringーAirborne Monitoring in the Distribution Survey of Radioactive Substances
・Air Dose RateーVehicle-borne SurveyーVehicle-borne Survey in the Distribution Survey of Radioactive Substances (KURAMA)
・Air Dose RateーWalk-borne SurveyーWalk-borne Survey
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーAir Dose Rate Measurements in the Distribution Survey of Radioactive Substances
・Radioactive Concentration-Survey of Depth Distribution in SoilーSurvey of Depth Distribution in SoilーDepth Distribution of Radioactive Cesium in Soil Collected Using a Scraper Plate in the Distribution Survey of Radioactive Substances
・Radioactive Concentration-DepositionーIn-situ MeasurementーDeposition of Gamma-Emitting Nuclides in the Distribution Survey of Radioactive Substances
・Radioactive Concentration-DepositionーAirborne MonitoringーUnmanned Helicopter Monitoring in the Distribution Survey of Radioactive Substances
・Radioactive Concentration-DepositionーAirborne MonitoringーAir-borne Monitoring in the Distribution Survey of Radioactive Substances
This is the Database for Radioactive Substance Monitoring Data renewed and released on October 1, 2021. Click here for the old site.