Radioactive Symbol - Meaning, History, and Safety Significance #131593 (License: Personal Use)

This iconic symbol, known as the radiation trefoil, consists of three yellow扇-shaped blades spaced 120 degrees apart around a central circle, all set against a black background. Designed in 1946 at the University of California, Berkeley, it was standardized by the IAEA and ISO for marking radioactive materials, equipment, and areas. Its high-contrast color scheme ensures visibility and immediate recognition, critical for hazard communication.

Used on containers, lab doors, transport vehicles, and signage in nuclear facilities, medical imaging centers, and research labs; matches user intent for safety education, regulatory compliance, or hazard identification.