361 NTERNATIONAL STANDARD ISO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEKIYHAPOHAA OPTAHH3AWS TIO CTAHIAPTM3ALIHHW.ORGANISATION INTERNATIONALE DE NORMALISATION Basic ionizing radiation symbol Symboledebasepourlesrayonnements ionisants First edition -- 1975-10-15 ISO 361-1975 (E) UDC 003.62 : 614.876.013 Ref.No. 1SO 361-1975 (E) Descriptors : nuclear energy, ionizing radiation, symbols. Price based on 1 page FOREWORD of national standards institutes (iSO Member Bodies). The work of developing International Standards is carried out through ISO Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. International organizations, governmentai and non-governmentai, in iaison with iso, aiso take part in tne work. Draft International Standards adopted by the Technica! Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the Iso Council. Prior to 1972, the results of the work of the Technical Committees were published as Iso Recommendations; these_ documents are now in the process of being transformed into International Standards._ As part of this_process, Technical Committee ISO/TC 85 has reviewed ISO Recommendation R 361 and found it technically suitable for transformation. International Standard ISO 361 therefore replaces ISO Recommendation R 361-1963 to which it is technically identical. ISO Recommendation R 361 was approved by the Member Bodies of the following countries : Ireland Spain Australia Beigium israei Sweden Canada ueder Switzerland Turkey Chile Netherlands Czechoslovakia New Zealand United Kingdom Norway Denmark U.S.A. Finland Poland U.S.S.R. Germany Portugal Yugoslavia Greece Romania Hungary South Africa, Rep. of The Member Bodies of the following countries expressed disapproval of the Recommendation on technical grounds : Austria France* Subsequently, this Member Body approved the Recommendation. No Member Body the transformation of f ISO/R 361 into an disapproved International Standard, International Organization for Standardization, 1975 · ? Printed in Switzerland ISO361-1975 (E) INTERNATIONAL STANDARD Basic ionizing radiation symbol 3 APPLICATION OF SYMBOL 1 SCOPEANDFIELD OFAPPLICATION ThisInternationalStandard specifiesthesymboltobeused 3.1 The symbol shalt be as prominent as is practical, and to signify the actual or potential presence of ionizing of a size consistent with the size of the equipment or radiation and to identify objects, devices, materials or material to which it is affixed or attached, provided that combinationsofmaterialswhichemitionizingradiation. For the purposes of this International Standard, ionizing in any case the symbol can be read from a safe distance. radiation includes gamma and X-rays: alpha and beta particles, high-speed electrons, neutrons, protons and other nuclear particles; but not sound or radio waves, or visibte, 3.2 The basic symbol for ionizing radiation may be infra-red, or ultra-violet light. This Internationat Standard accompanied by additional symbols or words, where does not specify the radiation levels at which the symbol is necessary to indicate danger. to be used. 2 SHAPE AND PROPORTIONS OF SYMBOL1) The basic symbol for signifying ionizing radiation or radioactive materials shall be designed and proportioned as 4 RESTRICTIONSONTHEUSEOFSYMBOL illustrated in the figure. 60° 4.1 The basic ionizing radiation symbol shall be used or displayed only to signify the actual or potential presence of ionizing radiations, as provided in clause 1. 4.2 Appropriate wording or other symbols may be used in association with the basic ionizing radiation symbol to indicate the nature of the source of radiation, type of radiation, limits of occupancy and similar precautionary information, but shall not detract from the clarity of the basic symbol. 0,5 D 4.3 It is recommended that additional symbols be limited 0.75 D