What does a radiation survey measure in a specific area?

A radiation survey is designed to obtain a systematic measurement of radiation levels in a specific area. This involves using radiation detection instruments to quantify the radiation intensity, which helps in assessing the potential exposure to individuals in that environment. By taking measurements at various points and depths, the survey provides a comprehensive understanding of radiation distribution and intensity across the surveyed area. This information is crucial for ensuring safety, complying with regulatory requirements, and implementing appropriate protective measures for workers and the public.

The other options do not correctly encapsulate the primary function of a radiation survey. While measuring the amount of radioactive source present could be part of the survey's context, it is not the focus; the survey measures radiation levels rather than the quantity of the source itself. Evaluating the effectiveness of protective equipment is related but not a direct goal of a radiation survey. Similarly, identifying the types of radiation emitted is not the primary aim, as the emphasis is on level measurement rather than the specific characterization of the radiation type.