What posting is required for dose rates of 50 mrem/hr at 30 cm?

The correct posting for dose rates of 50 mrem/hr at 30 cm is designated as a Radiation Area. According to regulatory guidelines, a Radiation Area is defined as a location where radiation levels are greater than 0.1 mrem/hr but less than 1,000 mrem/hr. Specifically, when the dose rate reaches 50 mrem/hr at a distance of 30 cm, it falls within this definition and necessitates specific signage and access controls to warn individuals of the potential radiation exposure.

While High Radiation Areas and other types of areas may represent higher levels of radiation or contamination, they pertain to different thresholds. For example, a High Radiation Area typically applies to locations where radiation levels exceed 1,000 mrem/hr, necessitating additional safety measures. Contamination Areas and High Contamination Areas focus on the presence of radioactive contamination rather than the direct exposure to radiation, making them inapplicable in this context. Understanding these distinctions is essential for proper safety protocols and compliance in environments where radiation exposure is a concern.