Radioactive Warning Symbol - Universal Nuclear Hazard Sign #263944 (License: Personal Use)

This image shows the standard ISO 361 radiation warning symbol: a black trefoil (three-bladed propeller) centered on a yellow circular background, with a small black circle at the center. Designed in 1946 at the University of California, Berkeley, it is universally recognized to indicate the presence of radioactive material or ionizing radiation sources. The high-contrast color scheme ensures visibility and immediate recognition in safety-critical environments.

Used on containers, doors, equipment, and signage in nuclear facilities, medical radiology departments, research labs, and transport packaging. Matches user intent for safety education, regulatory compliance, hazard identification, or technical documentation.