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Radiation Hazard Symbol - Universal Warning Sign for Ionizing Radiation #1951664 (License: Personal Use)

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International radiation warning symbol: black circle with three yellow triangular blades and central dot.

About this clipart

This universally recognized radiation hazard symbol, known as the trefoil, consists of a black circular background with three bold yellow扇-shaped blades spaced 120 degrees apart around a central yellow circle. Designed in 1946 at the University of California, Berkeley, it conveys immediate danger from ionizing radiation sources such as radioactive materials, X-ray equipment, or nuclear reactors. Its high-contrast design ensures visibility and rapid recognition across languages and cultures.
Used on signage, packaging, equipment labels, and safety documentation in nuclear power plants, radiology departments, research labs, and hazardous material transport. Matches user intent for safety awareness, regulatory compliance, emergency response, or educational content about radiation risks.
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Related Cliparts: The iconic trefoil radiation symbol warns of ionizing radiation hazards. Recognized globally, it’s used in nuclear facilities, labs, and medical settings to ensure safety.

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