What is the dose limit that defines a High Radiation Area?

A High Radiation Area is defined as a location where individuals might receive a dose of radiation exceeding a certain threshold. The specific dose limit that identifies a High Radiation Area is set at 100 millirem per hour. This limit is established to ensure the safety of workers and the public, providing a clear guideline for when enhanced protective measures and monitoring must be implemented.

A dose rate above this threshold indicates that the potential for significant radiation exposure exists, necessitating precautions to minimize risk. Understanding this limit is crucial for radiation workers, as it helps them recognize areas where they must take protective measures, such as using personal protective equipment or limiting their time spent in those areas.

The other options represent dose rates that are either too low or too high to meet the definition for a High Radiation Area. The selected limit of 100 millirem per hour appropriately balances the need for safety with operational realities in environments where radiation is present.