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… Radioactivity … of the decay (or disintegration) of an unstable atom . Radioactivity is also the term used to describe the rate at which radioactive material emits radiation . Radioactivity is measured in curies (Ci) , becquerels (Bq) , … Radioactivity …

Waste, radioactive …

Radioactive decay …

… or “ daughter products ”), accompanied by a decrease in radioactivity (compared to the parent material). This …

… Induced radioactivity … Radioactivity that is created when stable substances are … Induced radioactivity …

Radioactive contamination …

Radioactive series …

… Most low-level waste fades away to natural levels of radioactivity in months or years. Virtually all of it … spent fuel. Spent fuel is highly radioactive, and this radioactivity produces a lot of heat. Spent fuel, after … the spent fuel cools down and also begins to lose its radioactivity through radioactive decay, which we've already …

… Commission (NRC) does not regulate all sources of radioactivity; see Who Regulates Radioactive Materials and …

… Airborne radioactivity area … of Federal Regulations ( 10 CFR 20.1003 ), the airborne radioactivity area is a room, enclosure, or area in which … Airborne radioactivity area …