ISO INTERNATIONAL STANDARD 21482 First edition 2007-02-15 lonizing-radiation warning Supplementary symbol Avertissement pour rayonnements ionisants Symbole supplementaire Reference number ISO 21482:2007(E) @ISO2007 ISO 21482:2007(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through IsO technical committees. Each member body interested in a subject for which a technical committee has been non-governmental, in liaison with ISO, also take part in the work. Iso collaborates closely with the InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. rights.IsO shallnotbeheldresponsiblefor identifyinganyorall suchpatent rights. ISO 21482 was prepared by Technical Committee ISO/TC 85, Nuclear energy, Subcommittee SC 2, Radiation protection. @ ISo 2007 - All rights reserved ii ISO 21482:2007(E) Introduction The basic ionizing-radiation symbol, "the trefoil" [ISO 361, ISO 7010:2003, Table 1 (Reference number W003)] is used internationally to indicatethe presence of radiation.There is a history of people,in particularthose persons with insufficient technical education or background, receiving serious injuries or fatalities from radiation symbol on the source. The ability to interpret and understand the symbol is of crucial importance for all people With these problems in mind, the competent UN authority, the International Atomic Energy Agency (IAEA) with direction from the international community saw a necessity to develop a new symbol that is capable of fulfilling all the requirements placed on a warning symbol. For that purpose, the IAEA designed a number of symbols with different colours and shapes and evaluated them in a number of preliminary tests. A series of assessments and comparisons were completed among people with insufficient technical education or background, children and among different cultures in 11 different countries. The result is put forth in this International Standard. This symbol is intended to supplement the basic ionizing radiation symbol. iv IS0 2007 - All rights reserved INTERNATIONALSTANDARD ISO 21482:2007(E) lonizing-radiation warning Supplementary symbol Scope This International Standard specifies the symbol to warn of the presence of a dangerous level of ionizing radiation from a high-level sealed radioactive source that can cause death or serious injury if handled carelessly.Thissymbol isnotintended toreplacethebasicionizingradiationsymbol [lsO361 stay away from it. This symbol is recommended for use with International Atomic Energy Agency (IAEA) Category 1, 2, and 3 sealed radioactive sources. These sources are defined by the IAEA as having the ability to cause death or serious injuries. 2 Shape, proportions and colour of the symbol The supplementary ionizing radiation warning symbol (see Figures 1 and A.1) is diagrammed below. Thesymbolshallhaveared(pantoneredNo.187)backgroundwithblackfiguresandawhiteoutlineofthe figures. The symbol is acceptable without colour if the use of colour is not feasible, such as in the case of engraving the symbol on the source. The symbol should not be made smaller than 3,0 cm to assure that it is clearly visible. Figure 1 - Supplementary ionizing radiation warning symbol See Figures A.2 to A.6 for the individual elements of which this symbol is composed. @ IS0 2007 - All rights reserved ISO 21482:2007(E) 3Application of the symbol The supplementary radiation warning symb