Standard Test Method for Determining the Size of Iridium-192 Industrial Radiographic Sources

SIGNIFICANCE AND USE
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 an Iridium-192 radiographic source. 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.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
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 and health practices and determine the applicability of regulatory limitations prior to use.

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:E1114–09
Standard Test Method for
Determining the Size of Iridium-192 Industrial Radiographic
1
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 2.2 Other International Standards:
EN 12579 Industrial Radiography—Radiographic Method
1.1 This test method covers the determination of the size of
for the Determination of the Source Size for Radioiso-
an Iridium-192 radiographic source. The determination is
3
topes
based upon measurement of the image of the Iridium metal
source in a projection radiograph of the source assembly and
3. Terminology
comparison to the measurement of the image of a reference
3.1 Fordefinitionsoftermsrelatingtothistestmethod,refer
sample in the same radiograph.
to Terminology E1316.
1.2 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
4. Significance and Use
each system may not be exact equivalents; therefore, each
4.1 One of the factors affecting the quality of a radiographic
system shall be used independently of the other. Combining
image is geometric unsharpness. The degree of geometric
values from the two systems may result in non-conformance
unsharpness is dependent upon the size of the source, the
with the standard.
distance between the source and the object to be radiographed,
1.3 This standard does not purport to address all of the
and the distance between the object to be radiographed and the
safety concerns, if any, associated with its use. It is the
film or digital detector. This test method allows the user to
responsibility of the user of this standard to establish appro-
determine the size of the source and to use this result to
priate safety and health practices and determine the applica-
establish source to object and object to film or detector
bility of regulatory limitations prior to use.
distances appropriate for maintaining the desired degree of
geometric unsharpness.
2. Referenced Documents
2
2.1 ASTM Standards:
NOTE 1—TheEuropeanstandardCENEN 12579describesasimplified
E999 Guide for Controlling the Quality of Industrial Radio- procedure for measurement of source sizes of Ir-192, Co-60 and Se-75.
TheresultingsourcesizeofIr-192iscomparabletotheresultsobtainedby
graphic Film Processing
this test method.
E1316 Terminology for Nondestructive Examinations
E1815 Test Method for Classification of Film Systems for
5. Apparatus
Industrial Radiography
5.1 Subject Iridium-192 Source, the source size of which is
E2445 Practice for Qualification and Long-Term Stability
to be determined.The appropriate apparatus and equipment for
of Computed Radiology Systems
the safe storage, handling, and manipulation of the subject
E2597 Practice for Manufacturing Characterization of Digi-
source,suchasaradiographicexposuredevice(alsoreferredto
tal Detector Arrays
as a gamma ray projector or camera), remote control, source
guide tube, and source stop are also required.
1
This test method is under the jurisdictioin of ASTM Committee E07 on
5.2 Reference Sample (see Figs. 1-3)—The reference
Nondestructive Testing and is the direct responsibility of Subcommittee E07.01 on
sample shall be of material which is not radioactive. The
Radiology (X and Gamma) Method.
recommendedmaterialisIridium.However,substitutessuchas
CurrenteditionapprovedJune1,2009.PublishedJuly2009.Originallyapproved
platinum, tungsten or other material of similar radiopacity may
in 1986. Last previous edition approved in 2003 as E1114 – 03.
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. DOI: 10.1520/E1114-09. 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 ----------------------
E1114 – 09
FIG. 1 Reference Sample in Standard Source Encapsulation
FIG. 2 Alternate Reference Sample Arrangement
FIG. 3 Alternate Reference Sample Arrangement
TABLE 1 Examples of Typical X-ray Generator Output
192
Requirements for Related Iridium Source Activities
be used. The sample should be of the same geometric shape as
192
Subject Iridium Source Typical X-ray Generator
the subject source, should be approximately the same size as
Radiation Output Requirements
the sub
...

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:E1114–03 Designation:E1114–09
Standard Test Method for
Determining the Focal Size of Iridium-192 Industrial
1
Radiographic Sources
This standard is issued under the fixed designation E 1114; 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
1.1This test method covers the determination of the focal size of an iridium-192 radiographic source.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.
1.2
1.1 This test method covers the determination of the size of an Iridium-192 radiographic source. 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.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
E 999 Guide for Controlling the Quality of Industrial Radiographic Film Processing
E 1316 Terminology for Nondestructive Examinations
2
E 1815 Test Method for Classification of Film Systems for Industrial Radiography Test Method for Classification of Film
Systems for Industrial Radiography
E 2445 Practice for Qualification and Long-Term Stability of Computed Radiology Systems
E 2597 Practice for Manufacturing Characterization of Digital Detector Arrays
1
This test method is under the jurisdictioin of ASTM Committee E07 on Nondestructive Testing and is the direct responsibility of Subcommittee E07.01 on Radiology
(X and Gamma) Method.
´1
Current edition approved March 10, 2003. Published May 2003. Originally approved in 1986. Last previous edition approved in 1997 as E1114–92 (1997) .
Current edition approved June 1, 2009. Published July 2009. Originally approved in 1986. Last previous edition approved in 2003 as E 1114 – 03.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM Standards
, Vol 03.03.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 ----------------------
E1114–09
2.2 Other International Standards:
3
EN 12579 Industrial Radiography—Radiographic Method for the Determination of the Source Size for Radioisotopes
3. Terminology
3.1 For definitions of terms relating to this test method, refer to Terminology E 1316.
4. Significance and Use
4.1One of the factors affecting the quality of a radiographic image is geometric unsharpness. The degree of geometric
unsharpness is dependent upon the focal 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. This test method allows the user to determine the focal size of
the source and to use this result to establish source to object and object to film distances appropriate for maintaining the desired
degree of geometric unsharpness.
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 geom
...

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