Radiation Hazard Warning Sign - Official ISO Symbol for Ionizing Radiation #228541 (License: Personal Use)

This is the internationally recognized ISO 361 radiation warning symbol: a yellow equilateral triangle with a thick black border and a central black trefoil (three-bladed propeller) with a central circle. It signifies the presence of ionizing radiation sources that may pose health risks, and is mandated in nuclear, medical, and industrial settings worldwide. The high-contrast color scheme ensures visibility and immediate recognition.

Used on doors, equipment, containers, and signage in nuclear power plants, radiology departments, research labs, and hazardous material transport to warn personnel and the public of radiation risks; matches user intent for safety compliance, regulatory information, or educational content about hazard symbols.