If the exposure rate at the surface of a package containing radioactive materials exceeds which value, the NRC must be notified?

In the context of regulatory requirements set forth by the NRC (Nuclear Regulatory Commission), the specified exposure rate at the surface of a package containing radioactive materials is critical for ensuring safety and compliance. The threshold for notifying the NRC when the exposure rate exceeds is established at 200 mR/hr.

When the surface exposure rate of a package exceeds this threshold, it indicates a significant level of radiation that could pose a risk to health and safety, necessitating immediate reporting. This is part of the NRC's framework to manage and monitor radioactive materials, ensuring that any potential hazards are promptly addressed.

Understanding this threshold is crucial for professionals in the field of nuclear medicine and radiological safety, as it guides their protocols for handling hazardous materials and ensures adherence to safety regulations designed to protect both workers and the public.