Radiation Hazard Symbol - Universal Warning Sign for Radioactive Materials #228692 (License: Personal Use)

This high-contrast yellow-on-black trefoil symbol is the internationally recognized warning for ionizing radiation hazards. Designed by the U.S. Department of Energy in 1946, it features three blades spaced at 120 degrees around a central circle, indicating the emission of radiation from a source. It appears on containers, doors, equipment, and signage where radioactive materials are stored or used.

Commonly used in nuclear power plants, medical radiology departments, research labs, hazardous material transport, and emergency response contexts. Matches user intent for safety information, regulatory compliance, educational resources, or hazard identification.