Radiation Hazard Symbol - Meaning, History, and Safety Use #3282296 (License: Personal Use)

This is the standard ISO 361 radiation warning symbol: a yellow equilateral triangle with a black trefoil (three-bladed propeller) centered on a black background. Designed in 1946 at the University of California, Berkeley, it signifies the presence of potentially harmful ionizing radiation and is mandated by international standards including IAEA and OSHA guidelines. The high-contrast color scheme ensures visibility and immediate recognition in hazardous environments.

Used on nuclear facilities, medical radiology rooms, radioactive material containers, and equipment containing radiation sources; serves to prevent accidental exposure by alerting personnel and the public to radiation hazards. Matches user intent for safety education, regulatory compliance, or emergency preparedness information.