What constitutes a "high-risk radiation area"?

A "high-risk radiation area" is defined by specific radiation exposure levels that pose significant safety concerns for individuals. The correct condition indicates that these areas are characterized by radiation levels that exceed 100 mrem in one hour at a distance of 30 cm from the radiation source. This threshold is established by health and safety regulations to protect workers and the public from excessive radiation exposure, which can lead to acute effects and long-term health risks.

By identifying areas with such radiation levels, proper precautions and safety measures can be implemented. These may include restricted access, increased monitoring, and the use of personal protective equipment to ensure that individuals are not exposed to unsafe radiation levels. Understanding this definition is crucial for professionals working with or around radiation sources, as it informs their safety protocols and the necessary actions to mitigate risk.