At what distance must the radiation dose be measured when evaluating the need for a radioactive sign?

When evaluating the need for a radioactive sign, the standard practice is to measure the radiation dose at a distance of 1 meter. This distance is significant because it reflects the typical point at which individuals would be present in relation to radioactive materials or sources. By measuring the dose at this distance, it ensures that the potential exposure levels are representative of what a person would encounter if they were near the radiation source. This practice helps in establishing appropriate safety protocols and guidelines for radiation protection.

Although the other distances might be relevant in specific contexts, they do not align with the standard protocols commonly used for assessing radiation exposure and the corresponding need for signage. Adhering to the 1-meter distance aligns with regulatory standards and best practices in radiation safety management.