An area with a dose rate greater than 1000 mrem per hour at 30 cm from the source and kept locked to prevent inadvertent exposure is called which?

An area with a dose rate greater than 1000 mrem per hour at 30 cm from the source and kept locked to prevent inadvertent exposure is called which?

• A. Very High Radiation Area
• B. RCA
• C. Radiation Area
• D. Locked High Radiation Area

Answer: (D)

The key idea is combining a high dose-rate area with controlled access. A dose rate greater than 1000 mrem per hour at a short distance from the source shows a high radiation area, and the fact that the area is kept locked to prevent inadvertent exposure adds the access-control aspect. When both conditions are present, the official designation is a Locked High Radiation Area, signaling that entry requires authorization and adherence to entry procedures due to the elevated risk. This isn’t the same as a Very High Radiation Area, which refers to much higher dose rates, nor just a general Radiation Area, which doesn’t specify locked access. It also isn’t simply RCA, since the locking of the area is what makes it a Locked High Radiation Area.

The key idea is combining a high dose-rate area with controlled access. A dose rate greater than 1000 mrem per hour at a short distance from the source shows a high radiation area, and the fact that the area is kept locked to prevent inadvertent exposure adds the access-control aspect. When both conditions are present, the official designation is a Locked High Radiation Area, signaling that entry requires authorization and adherence to entry procedures due to the elevated risk. This isn’t the same as a Very High Radiation Area, which refers to much higher dose rates, nor just a general Radiation Area, which doesn’t specify locked access. It also isn’t simply RCA, since the locking of the area is what makes it a Locked High Radiation Area.