This part of International Standard IEC 61331 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 a TOTAL FILTRATION of up to 3,5 mm Cu.
This part 1 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.
1.2 Object
This part 1 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;
— ATTENUATION EQUIVALENT OR LEAD EQUIVALENT;
together with, as appropriate, an indication of inhomogeneity.
Ways of stating values of ATTENUATION properties in compliance with this part of the International
Standard are included.
— Methods for periodical checks of PROTECTIVE DEVICES, particularly of PROTECTIVE CLOTHING,
— methods of determining the ATTENUATION by layers in the RADIATION BEAM, and
— methods of determining the ATTENUATION for purposes of protection against IONIZING RADIATION
provided by walls and other parts of an installation;
will be described in separate standards.
BS EN 61331-1:2002 history
2014BS EN 61331-1:2014 Protective devices against diagnostic medical X-radiation. Determination of attenuation properties of materials
1995BS EN 61331-1:2002 Protective devices against diagnostic medical X-radiation - Determination of attenuation properties of materials