Gathered and archived DOE radiation data. The DOE has removed all of these files from the internet. They were originally made public back in October 2011.
US DOE has archived most of the related data here: https://www.energy.gov/articles/us-doennsa-response-2011-fukushima-incident-data-and-documentation
Google Spreadsheet of DOE radiation readings.
DOE radiation map of Fukushima download KMZ file for Google Earth
DOE presentation of the monitoring project (includes some maps) https://www.osti.gov/servlets/purl/1054702
DOE AMS Presentation March 29
DOE AMS Presentation March 25
DOE AMS Presentation March 22
DOE AMS Presentation April 4th
DOE AMS Presentation May 13
DOE AMS Presentation May 6
DOE AMS Presentation April 21
DOE AMS Presentation April 18
DOE AMS Presentation April 7