An area accessible where a person could receive more than 5 mrem in one hour at 30 centimeters from the source is called which?

An area accessible where a person could receive more than 5 mrem in one hour at 30 centimeters from the source is called which?

• A. High Radiation Area
• B. Radiation Area
• C. Very High Radiation Area
• D. Airborne Radioactivity Area

Answer: (B)

Understanding how area classifications relate to dose rate helps you see why this area is labeled as a Radiation Area. If you could receive more than 5 mrem in one hour at a distance of 30 centimeters from the source, that area is defined as a Radiation Area. This threshold is used to determine what kind of access control, signs, and dosimetry requirements apply to protect workers. Higher dose-rate areas have stricter classifications: a High Radiation Area is where the dose rate could exceed 100 mrem in one hour at 30 cm, and a Very High Radiation Area is where it could exceed 1 rem (1000 mrem) in one hour. Airborne Radioactivity Areas are defined by potential airborne contamination and involve different monitoring and controls, not just dose rate at a fixed distance. In this scenario, the definition fits Radiation Area, not the other categories.

Understanding how area classifications relate to dose rate helps you see why this area is labeled as a Radiation Area. If you could receive more than 5 mrem in one hour at a distance of 30 centimeters from the source, that area is defined as a Radiation Area. This threshold is used to determine what kind of access control, signs, and dosimetry requirements apply to protect workers.

Higher dose-rate areas have stricter classifications: a High Radiation Area is where the dose rate could exceed 100 mrem in one hour at 30 cm, and a Very High Radiation Area is where it could exceed 1 rem (1000 mrem) in one hour. Airborne Radioactivity Areas are defined by potential airborne contamination and involve different monitoring and controls, not just dose rate at a fixed distance. In this scenario, the definition fits Radiation Area, not the other categories.