The restricted area boundary needs to be posted at an area where no one can receive a dose of more than ____________ in any one hour?

The correct answer for the maximum allowable dose in a restricted area boundary is 2 mrem in any one hour. This standard is established to ensure that individuals are not exposed to hazardous levels of radiation.

In the context of radiation safety, a restricted area is defined as a location where access is limited to minimize the risk of radiation exposure to personnel. Posting a boundary at a dose of 2 mrem in any one hour reflects a robust safety measure; it ensures that individuals entering the area are kept within an acceptable radiation exposure limit, significantly less than thresholds that could contribute to harmful effects over time.

Exposure levels like 5 mR/hr, 100 mR/hr, or even just stating milirems alone, such as in the options offered, would not appropriately protect personnel according to industry standards. These levels risk exceeding safe exposure limits, which are carefully outlined in radiation safety regulations to safeguard health and maintain safety in operational environments involving radiation sources. The focus on the 2 mrem limit illustrates the importance of maintaining stringent monitoring and control measures in the vicinity of radiation, thus protecting workers and the public from potential harm.