The presence of radioactive material necessitates processes that are occupationally dangerous, hazardous to the natural environment, expensive and time-intensive.
en.wikipedia.org C constitutes a negligible part; but, since it is radioactive with a half-life of 5,700 years, it is radiometrically detectable.
en.wikipedia.org After the water evaporates, an invisible base surge of small radioactive particles may persist.
en.wikipedia.org When these safety devices are properly calibrated, maintained, and used, it is virtually impossible for a radiographer to be injured by a radioactive overexposure.
en.wikipedia.org Particles formed from detonations above, or in, the ocean, will contain short-lived radioactive sodium isotopes, and salts from the sea water.
en.wikipedia.org