EN 12679:2018

Non-destructive testing - Radiographic testing - Determination of the size of industrial radiographic gamma sources EN 12679:2018

Publication date:   Feb 14, 2019

General information

90.60 Close of review   Jun 3, 2024


CEN/TC 138 Non-destructive testing

European Norm

19.100   Non-destructive testing



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This document specifies the determination of the size of gamma radiographic sources of 0,5 mm or greater, made from the radionuclides Iridium 192, Ytterbium 169, Selenium 75 or Cobalt 60, by a method of radiography with X-rays. The source size of a gamma radiography source is an important factor which affects the image quality of gamma ray images.
The source size is determined with an accuracy of ± 10 % but typically not better than ± 0,1 mm.
The source size is provided by the manufacturer as the mechanical dimension of the source insert. A measurement may be required if the manufacturing process is validated or monitored after implementation of the source into the holder.
This document can be used for other radionuclides after validation.
The standard test method ASTM E1114 provides further information on the measurement of the Ir-192 source size, the characterization of the source shape, and its correct assembly and packaging.

Life cycle


EN 12679:1999


EN 12679:2018
90.60 Close of review
Jun 3, 2024