Radioactive Warning Symbol - Universal Radiation Hazard Sign #1688983 (License: Personal Use)

This image displays the internationally standardized radiation hazard symbol, known as the trefoil: three black blades arranged radially around a central circle, set against a vivid yellow square background. Designed by the U.S. Department of Energy in 1946 and later adopted by the IAEA and ISO, its high-contrast design ensures immediate recognition and visibility from a distance. The symbol is used on signage, packaging, equipment, and facilities handling radioactive materials to prevent accidental exposure.

This image is typically used on safety documentation, educational resources, emergency response guides, regulatory compliance pages, and industrial hazard signage. It matches user intent for identifying radiation risks, understanding safety protocols, or sourcing official warning symbols for compliance.