DIN EN 61331-1:2016-09

This standard applies to materials in sheet form used for the manufacturing of protective devices against X-radiation of radiation qualities generated with X-ray tube voltages up to 400 kV and gamma radiation emitted by radionuclides with photon energies up to 1,3 MeV. This standard is not intended to be applied to protective devices when these are to be checked for the presence of their attenuation properties before and after periods of use. It specifies the methods of determining and indicating the attenuation properties of the materials. The attenuation properties are given in terms of: - attenuation ratio; - build-up factor; and - attenuation equivalent together with, as appropriate, an indication of homogeneity and mass per unit area. Methods for periodical checks of protective devices, particularly of protective clothing, the methods of determining attenuation by layers in the radiation beam, and the methods of determining attenuation for purposes of protection against ionizing radiation provided by walls and other parts of an installation are described in separate standards. The International Standard has been prepared by IEC/TC 62/SC 62B "Diagnostic imaging equipment" with German collaboration at NAR-DKE-Gemeinschaftsausschusses NA 080-00-012 GA "Strahlenschutz" (Joint Working Committee NAR/DKE "Radiation protection").