Radioactive Hazard Symbol - Official Ionizing Radiation Warning Sign #191481 (License: Personal Use)

This is the internationally standardized trefoil symbol for ionizing radiation, defined by ISO 361 and adopted by the IAEA and OSHA. It features three bold red扇-shaped blades spaced at 120-degree intervals around a central circle, set against a black background for maximum contrast and visibility. The design conveys immediate danger and mandates caution in nuclear, medical, industrial, and research environments.

This image is used on safety signage, regulatory documentation, educational materials, and emergency response guides to indicate radiation hazards. It matches user intent for hazard identification, safety training, regulatory compliance, or scientific communication.