Which method best reduces the risk of inhaling radioactive particles?

Using masks suited for radiological protection is the most effective method to reduce the risk of inhaling radioactive particles. Masks designed for this purpose are specifically engineered to filter out airborne contaminants, including radioactive particles, thereby providing a physical barrier between the worker and the hazardous environment. These masks can significantly reduce the inhalation exposure by trapping airborne particles before they are breathed in, offering protection in high-risk areas.

Improving ventilation does help by dispersing airborne contaminants, but it may not be sufficient to fully protect against inhalation if the particles are still present in the air at significant levels. Similarly, implementing strict work-hour limits can minimize overall exposure time, but it doesn't directly address the immediate risk of inhaling radioactive particles while working. Training personnel on hazards is crucial for awareness and safe practices but does not provide physical protection against inhalation. Thus, using appropriate masks is the most direct and effective line of defense against inhaling radioactive particles.