To be more specific, you would not have been able to detect Fukushima waste based on radioactivity, as the radioactivity would not have been detectable above th

To be more specific, you would not have been able to detect Fukushima waste based on radioactivity, as the radioactivity would not have been detectable above the normal background radiation. They could only identify the waste by it's distinct radiological profile. Otherwise it was just another source amongst millions of ionizing radiation that bathes us every day.