Radiation Hazard Symbol - Official Trefoil Warning Sign #1346056 (License: Personal Use)

This high-contrast yellow-and-black trefoil symbol, standardized by the IAEA and ISO, consists of three black blades spaced at 120 degrees around a central circle, enclosed in a thick black border. It signifies the presence of ionizing radiation sources such as nuclear reactors, medical isotopes, or industrial radiography equipment. The design ensures immediate recognition even under poor visibility or language barriers.

Used on signage, packaging, equipment labels, and safety manuals in nuclear facilities, hospitals, research labs, and transport containers; matches user intent for hazard awareness, regulatory compliance, or educational reference.