Could the October 2012 shutdown of a nuclear power plant unit by Xcel Energy have anything to do with the series of radiation spikes we were exposed to in Minnesota around the same time? The spikes were first reported on Before It's News. According to radiationnetwork.com (where you can find current radiation levels for Minnesota and across the U.S.) background radiation normally "might average anywhere from 5 to 60 CPM, and while background radiation levels are random, it would be unusual for those levels to exceed 100 CPM." On October 25, 2012, Before It's News reported radiation levels in Minnesota spiked to 101 CPM which is above the "Alert Level" on the radiationnetwork.com website. Compare the image on the Before It's News website to one captured months before, in which Minnesota's radiation levels were completely unremarkable.
For days after the October 25th radiation incident, radiation levels in Minnesota fluctuated significantly. Here are two screenshots from radiationnetwork.com showing some of those fluctuations (the red highlights were added to the screenshots to point out Minnesota levels and the date/time of the images). Notice how Minnesota radiation levels were the highest documented levels on the Radiation Network's US map at those times.
Whatever happened, it would be nice to be informed what it was and that something has been done to make sure it doesn't happen again.