Heck with Iran going nuclear, North Korea already nuclear, along with the number of nuclear plants we currently have running that could be Tsunamied, we will probably be living with radiation for quite awhile.
At first the US was reporting fallout from Fukushima, at least universities were, State of Washington was getting heavy fallout at first. The snows in the California Sierras was full of it then it made it way to the east coast in certain areas esp. during storms then onward to Europe.
Then the EPA decided it wasn’t going to test sea water or collect air data for analysis, just about the time the head of GE went on the government payroll. Everything is hush hush now.
Japanese government wouldn’t even let imported Geiger counters past customs during the early stages of the meltdown. Then, Greenpeace was about the only source of readings from Japan and they had to be bootlegged onto Youtube. Arnie Gundersen got the bright idea to have Japanese volunteers send air filters from their vehicles for analysis. That showed Tokyo was a hot bed of fallout at the time.
Governments just playing coverup. Yes, Woods Hole is suspect but Greenpeace was the only other private researcher to try to do sampling and was runoff by the Japanese navy. That leaves Scripps Institute of Oceanography as a reputable researcher but haven’t heard much from them.
I forget which researcher(s) said fallout more than likely floated down to the ocean floor like snow where the food chain starts and normally thrives.