Standard Test Method for Determining the Size of Iridium-192, Cobalt-60, and Selenium-75 Industrial Radiographic Sources

SIGNIFICANCE AND USE
4.1 One of the factors affecting the quality of a radiographic image is geometric unsharpness. The degree of geometric unsharpness is dependent upon the size of the source, the distance between the source and the object to be radiographed, and the distance between the object to be radiographed and the film or digital detector. This test method allows the user to determine the size of the source and to use this result to establish source to object and object to film or detector distances appropriate for maintaining the desired degree of geometric unsharpness.
Note 1: The European standard CEN EN 12579 describes a simplified procedure for measurement of source sizes of Ir-192, Co-60, and Se-75. The resulting source size of Ir-192 is comparable to the results obtained by this test method.
SCOPE
1.1 This test method covers the determination of the size of Iridium-192, Cobalt-60, and Selenium-75 radiographic sources. The determination is based upon measurement of the image of the source in a projection radiograph of the source assembly and comparison to the measurement of the image of a reference sample in the same radiograph or the source guide tube.  
1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Publication Date
30-Nov-2020
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ASTM E1114-20 - Standard Test Method for Determining the Size of Iridium-192, Cobalt-60, and Selenium-75 Industrial Radiographic Sources
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Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: E1114 − 20
Standard Test Method for
Determining the Size of Iridium-192, Cobalt-60, and
1
Selenium-75 Industrial Radiographic Sources
This standard is issued under the fixed designation E1114; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Industrial Radiography
E2445 Practice for Performance Evaluation and Long-Term
1.1 This test method covers the determination of the size of
Stability of Computed Radiography Systems
Iridium-192, Cobalt-60, and Selenium-75 radiographic
E2597 Practice for Manufacturing Characterization of Digi-
sources. The determination is based upon measurement of the
tal Detector Arrays
image of the source in a projection radiograph of the source
E2002 Practice for Determining Total Image Unsharpness
assembly and comparison to the measurement of the image of
and Basic Spatial Resolution in Radiography and Radios-
a reference sample in the same radiograph or the source guide
copy
tube.
2.2 Other International Standards:
1.2 Units—The values stated in either SI units or inch-
EN 12679:2018 Industrial Radiography—Radiographic
pound units are to be regarded separately as standard. The
Method for the Determination of the Source Size for
values stated in each system are not necessarily exact equiva-
3
Radioisotopes
lents; therefore, to ensure conformance with the standard, each
system shall be used independently of the other, and values
3. Terminology
from the two systems shall not be combined.
3.1 Fordefinitionsoftermsrelatingtothistestmethod,refer
1.3 This standard does not purport to address all of the
to Terminology E1316.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Significance and Use
priate safety, health, and environmental practices and deter-
4.1 One of the factors affecting the quality of a radiographic
mine the applicability of regulatory limitations prior to use.
image is geometric unsharpness. The degree of geometric
1.4 This international standard was developed in accor-
unsharpness is dependent upon the size of the source, the
dance with internationally recognized principles on standard-
distance between the source and the object to be radiographed,
ization established in the Decision on Principles for the
and the distance between the object to be radiographed and the
Development of International Standards, Guides and Recom-
film or digital detector. This test method allows the user to
mendations issued by the World Trade Organization Technical
determine the size of the source and to use this result to
Barriers to Trade (TBT) Committee.
establish source to object and object to film or detector
distances appropriate for maintaining the desired degree of
2. Referenced Documents
geometric unsharpness.
2
2.1 ASTM Standards:
NOTE 1—The European standard CEN EN 12579 describes a simplified
E999 Guide for Controlling the Quality of Industrial Radio-
procedure for measurement of source sizes of Ir-192, Co-60, and Se-75.
graphic Film Processing
TheresultingsourcesizeofIr-192iscomparabletotheresultsobtainedby
this test method.
E1316 Terminology for Nondestructive Examinations
E1815 Test Method for Classification of Film Systems for
5. Apparatus
5.1 Subjects are Iridium-192, Cobalt-60, and Selenium-75
1
This test method is under the jurisdiction of ASTM Committee E07 on
Sources where the source sizes are to be determined. The
Nondestructive Testing and is the direct responsibility of Subcommittee E07.01 on
appropriate apparatus and equipment for the safe storage,
Radiology (X and Gamma) Method.
Current edition approved Dec. 1, 2020. Published February 2021. Originally handling, and manipulation of the subject source, such as a
approved in 1986. Last previous edition approved in 2014 as E1114 – 09(2014).
radiographic exposure device (also referred to as a gamma ray
DOI: 10.1520/E1114-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E1114 − 09 (Reapproved 2014) E1114 − 20
Standard Test Method for
Determining the Size of Iridium-192 Iridium-192, Cobalt-60,
1
and Selenium-75 Industrial Radiographic Sources
This standard is issued under the fixed designation E1114; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the determination of the size of an Iridium-192 radiographic source.Iridium-192, Cobalt-60, and
Selenium-75 radiographic sources. The determination is based upon measurement of the image of the Iridium metal source in a
projection radiograph of the source assembly and comparison to the measurement of the image of a reference sample in the same
radiograph. radiograph or the source guide tube.
1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in
each system mayare not benecessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be
used independently of the other. Combiningother, and values from the two systems may result in non-conformance with the
standard.shall not be combined.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
E999 Guide for Controlling the Quality of Industrial Radiographic Film Processing
E1316 Terminology for Nondestructive Examinations
E1815 Test Method for Classification of Film Systems for Industrial Radiography
E2445 Practice for Performance Evaluation and Long-Term Stability of Computed Radiography Systems
E2597 Practice for Manufacturing Characterization of Digital Detector Arrays
1
This test method is under the jurisdiction of ASTM Committee E07 on Nondestructive Testing and is the direct responsibility of Subcommittee E07.01 on Radiology
(X and Gamma) Method.
Current edition approved Oct. 1, 2014Dec. 1, 2020. Published November 2014February 2021. Originally approved in 1986. Last previous edition approved in 20092014
ε1
as E1114 – 09 .(2014). DOI: 10.1520/E1114-09R14.10.1520/E1114-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E1114 − 20
E2002 Practice for Determining Total Image Unsharpness and Basic Spatial Resolution in Radiography and Radioscopy
2.2 Other International Standards:
EN 12679:2000EN 12679:2018 Industrial Radiography—Radiographic Method for the Determination of the Source Size for
3
Radioisotopes
3. Terminology
3.1 For definitions of terms relating to this test method, refer to Terminology E1316.
4. Significance and Use
4.1 One of the factors affecting the quality of a radiographic image is geometric unsharpness. The degree of geometric unsharpness
is dependent upon the size of the source, the distance between the source and the object to be radiographed, and the distance
between the object to be radiographed and the film or digital detector. This test method allows the user to determine the size of
the source and to use this result to establish source to object and object to film or detector distances appropriate for maintaining
the desired degree of geometric unsharpness.
NOTE 1—The European standard CEN EN 12579 describes a simplified procedure for measurement of source sizes of Ir-192, Co-60Co-60, and Se-75.
The resulting source size of Ir-192 is comparable to the results obtained by this test method.
5. Apparatus
5.1 Subject Iridium-192 Source, S
...

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