Radiation Hazard Symbol - International Ionizing Radiation Warning Sign #1210141 (License: Personal Use)

This iconic trefoil symbol, standardized by the IAEA and ISO, consists of three black扇-shaped blades spaced at 120-degree intervals around a central circle, all enclosed within a circular boundary with notches at top, bottom, left, and right. It was first introduced in 1946 at the University of California, Berkeley, and has since become the universal sign for radioactive materials and radiation-emitting devices. The design ensures high visibility and immediate recognition across language barriers.

Used on nuclear facilities, medical imaging rooms, radioactive waste containers, and industrial equipment to warn personnel and the public of potential radiation exposure; matches user intent for safety education, regulatory compliance, or hazard identification.