Radioactive Symbol - Universal Warning Sign for Ionizing Radiation Hazards #115656 (License: Personal Use)

This image shows the standard ISO 361 radiation warning symbol: a bright yellow circle with three black equilateral triangles spaced at 120° around a central black circle, forming a trefoil pattern. Designed in 1946 at the University of California, Berkeley, it conveys immediate danger from ionizing radiation and is mandated by international safety standards. The high-contrast color scheme ensures visibility and instant recognition in hazardous environments.

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