(ISo 7212 International Standard INTE RNATIONAL ORGANIZATION FOR STANDARDIZATION MEKAYHAPOAHAH OPrAHW3ALWR nO CTAHAAPTW3AUWW-ORGANISATION INTERNATIONALE DE NORMALISATION Enclosures for protection against ionizing radiation - Lead shielding units for 50 mm and 100 mm thick walls Enceintes pour la protection contre les rayonnements ionisants -- Elements de blindage en plomb pour murs de 50 mm et 100 mm d'épaisseur First edition - 1986-06-15 UDC 691.74-431 : 621.039.58 Ref. No. 1SO 7212-1986 (E) Descriptors : nuclear energy, radiation protection, lead, bricks, classification, specifications, dimensions, designation. Price based on 55 pages Copyright International Organization for Standardization Not for Resale Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (lsO 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 established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the Iso Council. They are approved in accordance with IsO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 7212 was prepared by Technical Committee ISO/TC 85, Nuclear energy. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. International Organization for Standardization, 1986 Printed in Switzerland ii d without license from IHS Not for Resale ISO 7212-1986 (E) Contents Page Scope and field of application 1 2 Classification 3 Designation 3.1 Explanation of the reference number 3.2 Explanation of a designation example . 2 4 Specifications of the bricks 2 4.1 General . 2 4.2 Properties of the material 3 4.3 Profile of the chevron Section one: Lead shielding units - 50 mm thick 5 Categories 1 and2. 4 5.1 Plain bricks 4 5.2 Corner bricks 5.3 End bricks 6 5.4 Special bricks 8 5.5 Posts 10 5.6 - Assembly of basic units 10 5.7 Aperture bricks 13 5.8 Windows. 17 5.9 Sphere units . 19 5.10 Plugs 20 5.11 21 Reducing units 5.12 Assembly of functional units 22 6Category3 25 6.1 Piain bricks 25 Copyright International Organization for Standardization Not for Resale