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 following new contents have been released.
・Radioactive Concentration-River Soil ーMonitoring Results of Radioactive Substances in Public Water Areas (Surrounding Environment) by MOE
The survey results have been added to the following measurement items.
・Radioactive Concentration-SeawaterーSeawaterーResults of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Sea Water)
・Monitoring Results of Sea Area related to ALPS-treated water (Seawater) by MOE
・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Reinforcement of Monitoring in Fukushima Daiichi Nuclear Power Station Peripheral Sea Area (Marine Soil)
・Radioactive Concentration-Marine SoilーMarine SoilーDistribution of Radioactivity Concentration in the Marine Soil around Fukushima Dai-ichi NPP by TEPCO
The following new contents have been released.
・Air Dose RateーAirborne MonitoringーMonitoring results before decontamination of the decontamination model demonstration (unmanned helicopter)
・Air Dose RateーAirborne MonitoringーMonitoring results after decontamination of the decontamination model demonstration (unmanned helicopter)
・Air Dose RateーAirborne MonitoringーAfter snow accumulation (unmanned helicopter)
・Air Dose RateーAirborne MonitoringーBefore snow accumulation (unmanned helicopter)
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーMonitoring results before decontamination of the decontamination model demonstration (measured on the ground) (Measured height: 50 cm)
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーMonitoring results before decontamination of the decontamination model demonstration (measured on the ground) (Measured height: 100 cm)
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーMonitoring results after decontamination of the decontamination model demonstration (measured on the ground) (Measured height: 50 cm)
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーMonitoring results after decontamination of the decontamination model demonstration (measured on the ground) (Measured height: 100 cm)
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーBefore snow accumulation (ground measurement) for studying the effect of snow accumulation (measured height: 50 cm)
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーBefore snow accumulation (ground measurement) for studying the effect of snow accumulation (measured height: 100 cm)
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーAfter snow accumulation (ground measurement) for studying the effect of snow accumulation (measured height: 50 cm)
・Air Dose RateーSurvey Meter (ambient dose equivalent rate)ーAfter snow accumulation (ground measurement) for studying the effect of snow accumulation (measured height: 100 cm)
The survey results have been added to the following measurement items.
・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Readings of Accumulated Dose by The Federation of Electric Power Companies of Japan (Member Companies)
・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
The survey results have been added to the following measurement items.
・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 Measurements of subdrain, groundwater drain, and groundwater bypass by Fukushima Prefecture
・Radioactive Concentration-SeawaterーSeawaterーResults of environmental radiation monitoring survey of beaches by Fukushima Prefecture
・Radioactive Concentration-SeawaterーSeawaterーMonitoring Results of Sea Area related to ALPS-treated water (Seawater) by MOE
・Radioactive Concentration-SeawaterーSeawaterーRadioactive Concentration-SeawaterーSeawaterーDistribution of Radioactivity Concentration in the Seawater around Fukushima Dai-ichi NPP by TEPCO
・Radioactive Concentration-Marine SoilーMarine SoilーReinforcement of Monitoring in Fukushima Daiichi Nuclear Power Station Peripheral Sea Area (Marine Soil)
・Radioactive Concentration-Marine SoilーMarine SoilーDistribution of Radioactivity Concentration in the Marine Soil around Fukushima Dai-ichi NPP by TEPCO
This is the Database for Radioactive Substance Monitoring Data renewed and released on October 1, 2021. Click here for the old site.