Radiation Hazard Warning Sign - Safety Symbol & Meaning #3893027 (License: Personal Use)

This standardized warning sign features a bright yellow equilateral triangle with a thick black border and the iconic black trefoil (three-bladed) symbol centered inside, representing ionizing radiation. Designed by the U.S. Department of Energy in 1946 and later adopted globally, it signals potential exposure risks from radioactive sources. The high-contrast color scheme ensures visibility and immediate recognition in industrial, medical, and research environments.

Commonly displayed on doors, containers, equipment, and signage in nuclear facilities, hospitals (radiology/oncology), labs, and transport vehicles carrying radioactive materials; used to alert personnel and the public to radiation hazards and enforce safety protocols.