Radiation Hazard Symbol - Universal Warning Sign for Radioactive Materials #228534 (License: Personal Use)

This image shows the standard ISO 361 radiation trefoil symbol: a central black circle with three black blades spaced at 120 degrees on a yellow background, enclosed by a black circle. Designed in 1946 at the University of California, Berkeley, it conveys immediate danger from ionizing radiation and is mandated by IAEA and OSHA standards. Its high-contrast design ensures visibility and recognition across languages and contexts.

Used on containers, doors, equipment, and signage in nuclear facilities, medical imaging labs, research centers, and transport packaging to alert personnel and the public to radiation risks. Matches user intent for safety education, regulatory compliance, or hazard identification resources.