prEN ISO 32679

SLOVENSKI STANDARD
01-julij-2025
Neporušitvene preiskave - Radiografsko preskušanje - Ugotavljanje velikosti
industrijskih radiografskih gama izvorov (ISO 32679:2024)
Non-destructive testing - Radiographic testing - Determination of the size of industrial
radiographic gamma sources (ISO 32679:2024)
Zerstörungsfreie Prüfung - Durchstrahlungsprüfung - Bestimmung der Strahlergrößen
von industriell genutzten Radio-Nukliden (ISO 32679:2024)
Essais non destructifs - Contrôle radiographique - Détermination de la dimension des
sources de radiographie industrielle gamma (ISO 32679:2024)
Ta slovenski standard je istoveten z: prEN ISO 32679
ICS:
19.100 Neporušitveno preskušanje Non-destructive testing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

International
Standard
ISO 32679
First edition
Non-destructive testing —
2024-06
Radiographic testing —
Determination of the size of industrial
radiographic gamma sources
Essais non destructifs — Contrôle radiographique —
Détermination de la dimension des sources de radiographie
industrielle gamma
Reference number
ISO 32679:2024(en) © ISO 2024
ISO 32679:2024(en)
© ISO 2024
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Published in Switzerland
ii
ISO 32679:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test procedure . 2
4.1 Test alignment .2
4.2 Test practice .3
5 Requirements to digital equipment . 3
5.1 Digital Detectors .3
5.2 Test parameters for digital radiography .4
6 Measurement and determination of size d of the radiographic gamma source. 4
6.1 Measurement with film .4
6.2 Measurement with digital detectors .4
6.3 Determination of source size .6
7 Test report . 6
Bibliography . 7

iii
ISO 32679:2024(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
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in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
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This document was prepared by Technical Committee CEN/TC 138, Non-destructive testing (as EN
12679:2018) and was adopted (without modification other than that (those) given below) by Technical
Committee ISO/TC 135, Non-destructive testing, Subcommittee SC 5, Radiographic testing.
The main changes are as follows:
— revised definitions 3.1, 3.3 and 3.4;
— deleted definition 3.5;
— added Formula (1) defining the geometrical magnification factor;
— updated figures;
— editorial corrections.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
International Standard ISO 32679:2024(en)
Non-destructive testing — Radiographic testing — Determination
of the size of industrial radiographic gamma sources
1 Scope
This document specifies a test procedure for determination of the size of industrial radiographic gamma
sources of 0,5 mm or greater, made from the radionuclides Iridium 192, Ytterbium 169, Selenium 75 or Cobalt
60, by a radiography method with X-rays. The source size of a gamma radiation 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 can 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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 19232-5, Non-destructive testing — Image quality of radiographs — Part 5: Determination of the image
unsharpness value using duplex wire-type image quality indicators
ISO 16371-1, Non-destructive testing — Industrial computed radiography with storage phosphor imaging plates
— Part 1: Classification of systems
ASTM E 2002 - 22, Standard Practice for Determining Total Image Unsharpness and Basic Spatial Resolution in
Radiography and Radioscopy
ASTM E 2597/2597M - 22, Standard Practice for Manufacturing Charact
...