Radioactive Warning Symbol - International Ionizing Radiation Hazard Sign #292945 (License: Personal Use)

This image displays the internationally standardized radiation hazard symbol, known as the trefoil, adopted by the IAEA and ISO. It consists of three equilateral yellow blades spaced at 120-degree intervals around a central circle, set against a black background for maximum contrast and visibility. Designed in 1946 at the University of California, Berkeley, it remains the primary visual cue for radioactive materials, equipment, and controlled areas.

Used on signage, packaging, and safety documentation for nuclear facilities, medical radiology departments, laboratories, and transport containers. Matches user intent for hazard identification, safety training, regulatory compliance, or educational content about radiation risks.