What is the maximum permissible radiation dose from external sources in unrestricted areas?

The maximum permissible radiation dose from external sources in unrestricted areas is set at 1 mSv (millisievert) annually. This limit is established to ensure that individuals who are not occupationally exposed to radiation, including the general public, are protected from potential health risks associated with radiation exposure.

This threshold is based on guidelines from radiation protection organizations, which balance the need for public safety with the understanding that some level of exposure is unavoidable in certain environments. The limits are designed to minimize the risk of stochastic effects, such as cancer, ensuring that exposure remains as low as reasonably achievable while still allowing for societal benefits from various radiation technologies.

In unrestricted areas, where the public may be present, maintaining a dose limit of 1 mSv ensures a high standard of safety and health protection for all individuals.