Radioactive Hazard Symbol - Universal Warning Sign for Ionizing Radiation #3254625 (License: Personal Use)

This image shows the standard ISO 361 radiation warning symbol: a bright yellow equilateral triangle with a thick black border, containing a black central circle and three curved blades (trefoil) spaced at 120-degree intervals. Designed in 1946 at the University of California, Berkeley, it signifies the presence of ionizing radiation and is mandated by international safety standards such as IAEA regulations.

Commonly used on containers, doors, equipment, and signage in nuclear facilities, medical imaging departments, laboratories, and transport vehicles carrying radioactive substances. Matches user intent for safety education, regulatory compliance, or hazard identification.