Which description fits a Radiation Area?

A Radiation Area is defined as a location where an individual could receive a whole-body dose exceeding 5 millirem in one hour at a distance of 30 centimeters from a radiation source. This definition highlights the potential exposure risk present in such an area, making it critical for radiation safety protocols to be in place. Understanding this level of radiation exposure helps workers identify environments that require precaution and monitoring, ensuring they follow the necessary safety guidelines to minimize their risk of radiation exposure.

The other descriptions do not accurately represent a Radiation Area. Some areas may be designated for certain materials or restricted to trained personnel, but these characteristics do not specifically address the radiation exposure limits that define a Radiation Area. Additionally, an area with no radiation exposure risks would not qualify as a Radiation Area at all, as it would imply safety from radiation hazards rather than the potential for exposure.