Radiation Hazard Symbol - Universal Warning Sign for Ionizing Radiation #124142 (License: Personal Use)

This is the internationally recognized ionizing radiation warning symbol (ISO 361), designed in 1946 at the University of California, Berkeley. It features a black circular background with three equidistant yellow (or magenta) blades and a central circle, representing radiation emanating from an atomic nucleus. The symbol is used on containers, doors, equipment, and signage where radioactive materials or radiation-producing devices are present.

Used in nuclear power plants, medical imaging departments, research laboratories, hazardous waste sites, and safety training materials to alert personnel and the public to potential radiation exposure risks. Matches user intent for safety information, regulatory compliance, or educational content about radiation hazards.