Radioactive Warning Symbol - Meaning, History & Safety Guidelines #1689062 (License: Personal Use)

This high-contrast yellow-and-black trefoil symbol, standardized by the IAEA and ISO, signifies the presence of ionizing radiation. Designed in 1946 at the University of California, Berkeley, it features three curved blades rotating around a central circle to represent radiation emission from a source. It is mandated on containers, equipment, and facilities handling radioactive materials to ensure immediate visual recognition and safety compliance.

Used on signage, packaging, lab equipment, and nuclear facility entrances; serves users seeking hazard awareness, regulatory compliance info, or educational material on radiation safety.