According to regulations, what should radiation exposure levels be maintained at?

The focus of radiation safety is to minimize exposure to ionizing radiation as much as possible while keeping it within regulatory limits. The principle 'As Low As Reasonably Achievable' (ALARA) is fundamental in radiation protection. This means that exposure should be reduced to the lowest possible level, considering economic and societal factors.

Maintaining exposure levels at 10% or less of federal limits aligns perfectly with this principle, as it not only adheres to regulatory standards but actively promotes safety by significantly reducing risk. It ensures that the occupational and public exposure to radiation is minimized and demonstrates a commitment to protecting health.

The other responses, while adhering to certain safety standards, do not fully encapsulate this principle. For example, being at the federal limit, even if acceptable, does not prioritize minimizing exposure. Likewise, maintaining exposure at 50% of federal limits may still pose unnecessary risks when further reductions can and should be made. Hence, the most appropriate approach is to maintain radiation exposure levels at or below 10% of federal limits, aligning with the ALARA principle, emphasizing the importance of safety and health in radiation practices.