ISO/ASTM 51310:2002

Practice for use of a radiochromic optical waveguide dosimetry system

ISO/ASTM 51310 covers the handling, testing and procedure for using a radiochromic optical waveguide dosimetry system to measure absorbed doses in materials irradiated by photons in terms of absorbed dose in water. This practice applies to radiochromic optical waveguide dosimeters that can be used within part or all of the specified ranges as follows: absorbed dose range from 1 Gy to 10 000 Gy for photons; absorbed dose rate from 0,001 Gy/s to 1 000 Gy/s; radiation energy range for photons from 0,1 MeV to 10 MeV; irradiation temperature range from - 78 °C to + 60 °C.

Pratique de l'utilisation d'un système dosimétrique à guide d'ondes optiques radiochromiques

General Information

• Status: Withdrawn
• Publication Date: 17-Apr-2002
• Withdrawal Date: 17-Apr-2002
• ICS: 17.240 - Radiation measurements
• Technical Committee: ISO/TC 85 - Nuclear energy, nuclear technologies, and radiological protection
• Drafting Committee: ISO/TC 85 - Nuclear energy, nuclear technologies, and radiological protection
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 08-Jul-2004

Relations

• Revised: ISO/ASTM 51310:2004 - Practice for use of a radiochromic optical waveguide dosimetry system
• Effective Date: 15-Apr-2008
• Revises: ISO 15559:1998 - Practice for use of a radiochromic optical waveguide dosimetry system
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTERNATIONAL ISO/ASTM
STANDARD 51310
First edition
2002-03-15
Practice for use of a radiochromic optical
waveguide dosimetry system
Pratique de l’utilisation d’un système dosimétrique à guide
d’ondes optiques radiochromiques
Reference number
ISO/ASTM 51310:2002(E)
© ISO/ASTM International 2002

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ISO/ASTM 51310:2002(E)
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ii © ISO/ASTM International 2002 – All rights reserved

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ISO/ASTM 51310:2002(E)
Contents Page
1 Scope . 1
2 Referenced documents . 1
3 Terminology . 1
4 Significance and use . 2
5 Apparatus . 2
6 Performance check of instrumentation . 2
7 Calibration of the dosimetry system . 3
8 Procedure . 3
9 Characterization of each batch of dosimeters . 3
10 Application of dosimetry system . 4
11 Minimum documentation . 4
12 Measurement uncertainty . 4
13 Keywords . 4
Bibliography . 5
Figure 1 Block diagram of the instrument described in section 5 . 2
© ISO/ASTM International 2002 – All rights reserved iii

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ISO/ASTM 51310:2002(E)
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 ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are circulated to the member bodies for
voting. Publication as an International Standard requires approval by at least 75% of the member bodies
casting a vote.
ASTM International is one of the world’s largest voluntary standards development organizations with global
participation from affected stakeholders. ASTM technical committees follow rigorous due process balloting
procedures.
A pilot project between ISO and ASTM International has been formed to develop and maintain a group of
ISO/ASTM radiation processing dosimetry standards. Under this pilot project, ASTM Subcommittee E10.01,
Dosimetry for Radiation Processing, is responsible for the development and maintenance of these dosimetry
standards with unrestricted participation and input from appropriate ISO member bodies.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. Neither ISO nor ASTM International shall be held responsible for identifying any or all such
patent rights.
International Standard ISO/ASTM 51310 was developed by ASTM Committee E10, Nuclear Technology and
Applications, through Subcommittee E10.01, and by Technical Committee ISO/TC 85, Nuclear Energy.
iv © ISO/ASTM International 2002 – All rights reserved

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ISO/ASTM 51310:2002(E)
Standard Practice for
Use of a Radiochromic Optical Waveguide Dosimetry
1
System
This standard is issued under the fixed designation ISO/ASTM 51310; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision.
1. Scope E 925 Practice for the Periodic Calibration of Narrow Band-
4
Pass Spectrophotometers
1.1 This practice covers the handling, testing, and procedure
E 958 Practice for Measuring Practical Spectral Bandwidth
for using a radiochromic optical waveguide dosimetry system
4
of Ultraviolet-Visible Spectrophotometers
to measure absorbed dose in materials irradiated by photons in
E 1026 Practice for Using the Fricke Reference Standard
terms of absorbed dose in water.
2
Dosimetry System
1.2 This practice applies to radiochromic optical waveguide
2.2 ISO/ASTM Standards:
dosimeters that can be used within part or all of the specified
51204 Practice for Dosimetry in Gamma Irradiation Facili-
ranges as follows:
2
ties for Food Processing
1.2.1 The absorbed dose range is from 1 to 10 000 Gy for
51205 Practice for Use of a Ceric-Cerous Sulfate Dosimetry
photons.
2
System
1.2.2 The absorbed dose rate is from 0.001 to 1000 Gy/s.
51261 Guide for Selection and Calibration of Dosimetry
1.2.3 The radiation energy range for photons is from 0.1 to
2
Systems for Radiation Processing
10 MeV.
51275 Practice for Use of a Radiochromic Film Dosimetry
1.2.4 The irradiation temperature range is from –78 to
2
System
+60°C.
51276 Practice for Use of a Polymethylmethacrylate Do-
1.3 This standard does not purport to address all of the
2
simetry System
safety concerns, if any, associated with its use. It is the
2.3 International Commission on Radiation Units and
responsibility of the user of this standard to establish appro-
5
Measurements (ICRU) Reports:
priate safety and health practices and determine the applica-
ICRU Report 14 Radiation Dosimetry: X-Rays and Gamma
bility of regulatory limitations prior to use.
Rays with Maximum Photon Energies Between 0.6 and 50
2. Referenced Documents MeV
ICRU Report 17 Radiation Dosimetry: X–Rays Generated
2.1 ASTM Standards:
at Potentials of 5 to 150 kV
E 170 Terminology Relating to Radiation Measurements
2
ICRU Report 34 The Dosimetry of Pulsed Radiation
and Dosimetry
ICRU Report 60 Radiation Quantities and Units
E 177 Practice for Use of the Terms Precision and Bias in
3
ASTM Test Methods
3. Terminology
3
E 178 Practice for Dealing with Outlying Observations
3.1 Definitions:
E 275 Practice for Describing and Measuring Performance
3.1.1 analysis wavelength—wavelength used in a spectro-
of Ultraviolet, Visible, and Near Infrared Spectrophotom-
4
photometric instrument for the measurement of optical absor-
eters
2
bance.
E 456 Terminology Relating to Quality and Statistics
3.1.2 calibration curve—graphical representation of the
E 666 Practice for Calculating Absorbed Dose from Gamma
2
dosimetry system’s response function.
or X Radiation
3.1.3 dosimeter batch—quantity of dosimeters made from a
E 668 Practice for the Application of Thermoluminescence-
specific mass of material with uniform composition, fabricated
Dosimetry (TLD) Systems for Determining Absorbed Dose
2
in a single production run under controlled, consistent condi-
in Radiation-Hardness Testing of Electronic Devices
tions and having a unique identification code.
3.1.4 dosimetry system—a system used for determining
1
This guide is under the jurisdiction of ASTM Committee E10 on Nuclear
absorbed dose, consisting of dosimeters, measurement instru-
Technology and Applications and is the direct responsibility of Subcommittee
E10.01 on Dosimetry for Radiation Processing, and is also under the jurisdiction of ments and their associated reference standards, and procedures
ISO/TC 85/WG 3.
for the system’s use.
Current edition approved Jan. 22, 2002. Published March 15, 2002. Originally
3.1.5 measurement quality assurance plan—a documented
e1
published as ASTM E 1310–89. Last previous ASTM edition E 1310–98 . ASTM
program for the measurement process that ensures on a
E 1310–94 was adopted by ISO in 1998 with the intermediate designation ISO
15559:1998(E). The present International Standard ISO/ASTM 51310:2002(E) is a
revision of ISO 15559.
2
Annual Book of ASTM Standards, Vol 12.02.
5
3
Available from the International Commission on Radiation Units and Measure-
Annual Book of ASTM Standards, Vol 14.02.
4
ments, 7910 Woodmont Ave., Suite 800, Bethesda, MD 20814, U.S.A.
Annual Book of ASTM Standards, Vol 03.06.
© ISO/ASTM International 2002 – All rights reserved
1

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ISO/ASTM 51310:2002(E)
continuing basis that the overall uncertainty meets the require- 3.2 Definitions or other terms used in this standard that
ments of the specific application. This plan requires traceability pertain to radiation measurement and dosimetry may be found
to, and consistency with, nationally or internationally recog- in ASTM Terminology E 170. Definitions in ASTM E 170 are
nized standards. compatible with ICRU 60; that document, therefore, may be
3.1.6 net response, DR—the radiation–induced change in used as an alternative reference.
the relationship of measured absorbance at a specific wave-
4. Significance and Use
length determined by subtracting the pre–irradiation response,
R , from the post–irradiation response, R:
4.1 The radiochromic optical waveguide dosimetry system
0
provides a means of measuring absorbed dose in materials.
DR 5 R 2 R (1)
0
Under the influence of ionizing radiation, chemical reactions
where:
take place in the radiochromic optical waveguide creating
A
l
and/or modifying optical absorbance bands in the visible
R 5 (2)
A
lref
region of the spectrum. Optical response is determined at
A
selected wavelengths using the equations in 3.1.6. Examples of
l
R 5
F G
0
A
lref
0 appropriate wavelengths for the analysis for specific dosimetry
systems are provided by their manufacturers and in Refs (1)
where:
through (5).
A = optical absorbance at the analysis wavelength, l,
l
4.2 In the application of a specific dosimetry system,
and
absorbed dose is determined by use of a calibration curve
A = optical absorbance at a reference wavelength, l .
lref ref
traceable to national standards.
4.3 The absorbed dose determined is usually specified in
A block diagram of an instrument capable of measuring R or R
0
water. Absorbed dose in other materials may be determined by
is shown in Fig. 1.
applying the conversion factors discussed in ISO/ASTM Guide
51261.
NOTE 1—For a comprehensive discussion of various dosimetry meth-
ods applicable to the radiation types and energies discussed in this
practice, see ICRU Reports 14, 17, and 34.
4.4 These dosimetry systems commonly are applied in the
industrial radiation processing of a variety of products, for
example, the sterilization of medical devices and radiation
processing of foods (4-6).
5. Apparatus
5.1 The following shall be used to determine absorbed dose
with radiochromic optical waveguide dosimetry systems:
5.1.1 Dosimeters—A batch or portion of a batch of radio-
FIG. 1 Block Diagram of the Instrument Described in Section 5
chromic optical waveguide dosimeters.
5.1.2 Spectrophotometer or Photometer—An instrument,
either a spectrophotometer equipped with a special dosimeter
3.1.7 optical waveguide—a device that contains an optical
holder and associated coupling optics (see Ref 7 for an
path at a high index of refraction relative to the material
example), or a modified photometer (Fig. 1), having documen-
enclosing the optical path.
tation covering analysis wavelengths, accuracy of wavelength
3.1.8 radiochromic optical waveguide—a specially pre-
selection, absorbance determination, spectral bandwidth, and
pared optical waveguide containing ingredients that undergo an
stray light rejection.
ionizing radiation–induced change in photometric absorbance.
5.1.3 Holder, to position the dosimeter reproducibly in the
This change in absorbance can be related to absorbed dose in
6 measuring light beam.
water (1, 2).
3.1.9 reference wavelength, l — the wavelength selected
ref
6. Performance Check of Instrumentation
for comparison with the analysis wavelength. This wavelength
6.1 Check and document the performance of the photometer
is chosen to minimize effects associated with optical coupling
or spectrophotometer (see ASTM Practices E 275, E 925,
and other geometric variations in the dosimeter.
E 958, and E 1026).
3.1.10 response function—mathematical representation of
6.1.1 When using a photometer, check and document the
the relationship between dosimeter response and absorbed dose
accuracy of the absorbance scale at intervals not to exceed one
for a given dosimetry system.
month during periods of use, or whenever there are indications
of poor performance.
6 6.1.2 When using a spectrophotometer, check and document
The boldface numbers in parentheses refer to the bibliography at the end of this
practice. the precision and bias of the wavelength scale and absorbance
© ISO/ASTM International 2002 – All rights reserved
2

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ISO/ASTM 51310:2002(E)
scale at or near the selected analysis wavelength(s) at intervals 8.1.3 Visually inspect the dosimeters for imperfections (for
not to exceed one month during periods of use, or whenever example, loss of end fittings). Discard any dosimeters that
there are indications of poor performance. show imperfections.
6.1.3 Document the comparison of information obtained in 8.1.4 Identify the dosimeters with an appropriate code that
6.1.1 or 6.1.2 with the original instrument specification to can be related to the manufacturer, type, and batch.
verify adequate performance. 8.1.5 Store the dosimeters in accordance with the manufac-
turer’s writ
...