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The international radiation symbol is a trefoil around a small central circle representing radiation from an atom. It first appeared in 1946 at the University of California, Berkeley Radiation Laboratory. [4] At the time, it was rendered as magenta, and was set on a blue background.
ISO 21482 is a technical standard that specifies the design and usage of a "supplemental radiation warning symbol", a warning symbol.It is intended to warn people of the dangers of radiation hazards posed by sealed sources, and encourage the viewer to get away from the source.
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English: A diagram that explains the difference between the existing radiation warning symbol, the 'trefoil', or ISO 7010 - W003 - Radioactive material or ionizing radiation (The larger, yellow symbol), and ISO 21482's supplemental radiation warning symbol. (The smaller red symbol visible in panel 2.).
Together with the International Organization for Standardization (ISO), the IAEA developed a new symbol that would serve as an intuitive warning for large sources of ionizing radiation. The new symbol was published in 2007 as ISO 21482, and is intended to accompany the trefoil on internal components of devices containing dangerous sources to ...
The fourfold version of an architectural trefoil is a quatrefoil. A simple trefoil shape in itself can be symbolic of the Trinity, [1] while a trefoil combined with an equilateral triangle was also a moderately common symbol of the Christian Trinity during the late Middle Ages in some parts of Europe, similar to a barbed quatrefoil. Two forms ...
Correct US radiation warning symbol. Based on specification from . The black-on-yellow (international) symbol can be found at Radiation warning symbol.svg. The black-on-yellow version is acceptable in the US as well. For a version that is black with no background, see Radiation warning symbol2.svg. Created by myself in Inkscape. Date
Correct radiation warning symbol. Based on specification from . The magenta-on-yellow symbol can be found at Image:radiation warning symbol-US.svg. Created by user:Fibonacci in gedit. This image is highly optimized SVG, and uses less than 1K. For the same symbol with a yellow background, see Image:Radiation warning symbol.svg. Date