Radioactive Warning Symbol - International Ionizing Radiation Hazard Sign #131532 (License: Personal Use)

This is the standard ISO 361 radiation hazard symbol, featuring a yellow circle with a black trefoil (three-bladed propeller) and central dot, enclosed by a black border. Designed in 1946 at the University of California, Berkeley, it conveys immediate visual warning of potentially lethal ionizing radiation exposure. Its high-contrast color scheme ensures visibility and recognition across languages and contexts.

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 information, regulatory compliance, educational content, or hazard identification.