Radiation mapping of the reactor buildings had been sparse in the early years of the disaster, more recently TEPCO has released a larger archive of radiation mapping of each unit. This data is useful for understanding the reduction or persistence of radiation in the reactor buildings over time. Each of the reactor buildings has undergone some level of decontamination in portions of the building to reduce radiation levels, this will directly influence the numbers in these maps.
Fukushima Unit 1 Radiation Maps 2021
Sections in red were mapped on previous years.
Sections in white have not been mapped.
Older maps of unit 1 can be found as PDF documents for each year 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013
Fukushima Unit 2 Radiation Maps 2021
Sections in red were mapped on previous years.
Sections in white have not been mapped.
Older maps of unit 2 can be found as PDF documents for each year 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013
Fukushima Unit 3 Radiation Maps 2021
Sections in red were mapped on previous years.
Sections in white have not been mapped.
Older maps of unit 3 can be found as PDF documents for each year 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013
Fukushima Unit 4 Radiation Maps 2021
Sections in red were mapped on previous years.
Sections in white have not been mapped.
Older maps of unit 4 can be found as PDF documents for each year 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013
Fukushima Unit 5 Radiation Maps 2021
Sections in red were mapped on previous years.
Sections in white have not been mapped.
Older maps of unit 5 can be found as PDF documents for each year 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013
Fukushima Unit 6 Radiation Maps 2021
Sections in red were mapped on previous years.
Sections in white have not been mapped.
Older maps of unit 6 can be found as PDF documents for each year 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013
Radiation readings are available for some other facilities on site but appear to not be significant sources of contamination.
Centralized environmental facility view radiation map archives
Miscellaneous solid waste incinerator view radiation map archives
Solid waste storage view radiation map archives
2021 Radiation Map of Reactor Blocks
An archive of the above map can be found here.
These radiation maps below are the original first public set of radiation mapping of the reactor buildings provided by TEPCO.
Unit 1
Unit 2:
Unit 3:
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