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 homepage has been renewed.
The following new contents have been released.
・Radioactive Concentration-Game Meat and Marine organismーMarine organismーReadings of the Monitoring on Radioactivity Level in fish and shellfish by TEPCO
The 2022 survey results have been added to the following survey results.
・Radioactive Concentration-Game Meat and Marine organismーMarine organismーReadings of the Monitoring on Radioactivity Level in Fisheries Products by Fisheries Agency
・Air Dose Rateー Survey Meter (ambient dose equivalent rate)ーFukushima Prefecture Environmental Radiation Monitoring-Mesh Investigation
The following new contents have been released.
・Radioactive Concentration-SeawaterーSeawaterーReinforcement of marine environment monitoring related to the release of ALPS-treated water into the ocean
The 2022 survey results have been added to the following survey results.
・Air Dose Rateー Survey Meter (ambient dose equivalent rate)ーReadings of Environmental Radiation Monitoring (at Hot springs) in Fukushima Prefecture
・Air Dose Rateー Survey Meter (ambient dose equivalent rate)ーReadings of Environmental Radiation Monitoring (at Tourist Spots) in Fukushima Prefecture
・Air Dose Rateー Survey Meter (ambient dose equivalent rate)ーLocality data
The survey results up to October, 2022 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 survey results up to March, 2022 have been added to the survey results below.
・Radioactive Concentration-FoodーFoodーReadings of Survey Results of Food in Fukushima Prefecture
The survey results up to June, 2022 have been added to the survey results below.
・Radioactive Concentration-River WaterーRiver / Lake WaterーFukushima River Tritium
The 2021 survey results have been added to the following survey results.
・Radioactive Concentration-Marine Soilー Marine SoilーResults of Monitoring (Marine Soil) by MOE
The survey results up to October, 2021 have been added to the survey results below.
・Radioactive Concentration-Game Meat and Marine organismーMarine organismーReadings of the Monitoring on Radioactivity Level in Fisheries Products by Fisheries Agency
This is the Database for Radioactive Substance Monitoring Data renewed and released on October 1, 2021. Click here for the old site.