ASTM ISO/ASTM51631-20
(Practice)Standard Practice for Use of Calorimetric Dosimetry Systems for Dose Measurements and Routine Dosimetry System Calibration in Electron Beams
Standard Practice for Use of Calorimetric Dosimetry Systems for Dose Measurements and Routine Dosimetry System Calibration in Electron Beams
SIGNIFICANCE AND USE
4.1 This practice is applicable to the use of calorimetric dosimetry systems for the measurement of absorbed dose in electron beams, the qualification of electron irradiation facilities, periodic checks of operating parameters of electron irradiation facilities, and calibration of other dosimetry systems in electron beams. Calorimetric dosimetry systems are most suitable for dose measurement at electron irradiation facilities utilizing conveyor systems for transport of product during irradiation.
Note 1: For additional information on calorimetric dosimetry system operation and use, see ICRU Report 80. For additional information on the use of dosimetry in electron accelerator facilities, see ISO/ASTM 51649, and ICRU Reports 34 and 35, and Refs (1-3).6
4.2 The calorimetric dosimetry systems described in this practice are not primary standard dosimetry systems. The calorimeters are classified as Type II dosimeters (ISO/ASTM 52628). They might be used as internal standards at an electron beam irradiation facility, including being used as transfer standard dosimetry systems for calibration of other dosimetry systems, or they might be used as routine dosimeters. The calorimetric dosimetry systems are calibrated by comparison with transfer standard dosimeters.
4.3 The dose measurement is based on the measurement of the temperature rise (dosimeter response) in an absorber (calorimetric body) irradiated by an electron beam. Different absorbing materials are used, but the response is usually defined in terms of dose to water.
Note 2: The calorimetric bodies of the calorimeters described in this practice are made from low atomic number materials. The electron fluences within these calorimetric bodies are almost independent of energy when irradiated with electron beams of 1.5 MeV or higher, and the mass collision stopping powers are approximately the same for these materials.
4.4 The absorbed dose in other materials irradiated under equivalent conditions can be cal...
SCOPE
1.1 This practice covers the preparation and use of semi-adiabatic calorimetric dosimetry systems for measurement of absorbed dose and for calibration of routine dosimetry systems when irradiated with electrons for radiation processing applications. The calorimeters are either transported by a conveyor past a scanned electron beam or are stationary in a broadened beam.
1.2 This document is one of a set of standards that provides recommendations for properly implementing dosimetry in radiation processing, and describes a means of achieving compliance with the requirements of ISO/ASTM Practice 52628 for a calorimetric dosimetry system. It is intended to be read in conjunction with ISO/ASTM Practice 52628.
1.3 The calorimeters described in this practice are classified as Type II dosimeters on the basis of the complex effect of influence quantities. See ISO/ASTM Practice 52628.
1.4 This practice applies to electron beams in the energy range from 1.5 to 12 MeV.
1.5 The absorbed dose range depends on the calorimetric absorbing material and the irradiation and measurement conditions. Minimum dose is approximately 100 Gy and maximum dose is approximately 50 kGy.
1.6 The average absorbed-dose rate range shall generally be greater than 10 Gy·s-1.
1.7 The temperature range for use of these calorimetric dosimetry systems depends on the thermal resistance of the calorimetric materials, on the calibration range of the temperature sensor, and on the sensitivity of the measurement device.
1.8 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.
1.9 This international standard was developed in accordance with internationally recognized principles on standardization establis...
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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.
ISO/ASTM 51631:2020(E)
Standard Practice for
Use of Calorimetric Dosimetry Systems for Dose
Measurements and Routine Dosimetry System Calibration in
1
Electron Beams
This standard is issued under the fixed designation ISO/ASTM 51631; 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 priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.1 This practice covers the preparation and use of semi-
1.9 This international standard was developed in accor-
adiabatic calorimetric dosimetry systems for measurement of
dance with internationally recognized principles on standard-
absorbeddoseandforcalibrationofroutinedosimetrysystems
ization established in the Decision on Principles for the
when irradiated with electrons for radiation processing appli-
Development of International Standards, Guides and Recom-
cations. The calorimeters are either transported by a conveyor
mendations issued by the World Trade Organization Technical
past a scanned electron beam or are stationary in a broadened
Barriers to Trade (TBT) Committee.
beam.
1.2 This document is one of a set of standards that provides 2. Referenced Documents
recommendations for properly implementing dosimetry in 2
2.1 ASTM Standards:
radiation processing, and describes a means of achieving
E666Practice for CalculatingAbsorbed Dose From Gamma
compliance with the requirements of ISO/ASTM Practice
or X Radiation
52628 for a calorimetric dosimetry system. It is intended to be
E668 Practice for Application of Thermoluminescence-
read in conjunction with ISO/ASTM Practice 52628.
Dosimetry (TLD) Systems for Determining Absorbed
1.3 The calorimeters described in this practice are classified DoseinRadiation-HardnessTestingofElectronicDevices
as Type II dosimeters on the basis of the complex effect of E3083Terminology Relating to Radiation Processing: Do-
influence quantities. See ISO/ASTM Practice 52628. simetry and Applications
2
2.2 ISO/ASTM Standards:
1.4 This practice applies to electron beams in the energy
51261Practice for Calibration of Routine Dosimetry Sys-
range from 1.5 to 12 MeV.
tems for Radiation Processing
1.5 The absorbed dose range depends on the calorimetric
51649Practice for Dosimetry in an Electron Beam Facility
absorbing material and the irradiation and measurement con-
for Radiation Processing at Energies Between 300 keV
ditions. Minimum dose is approximately 100 Gy and maxi-
and 25 MeV
mum dose is approximately 50 kGy.
51707Guide for Estimating Uncertainties in Dosimetry for
1.6 Theaverageabsorbed-doseraterangeshallgenerallybe Radiation Processing
-1
greater than 10 Gy·s . 52628Practice for Dosimetry in Radiation Processing
2.3 International Commission on Radiation Units and Mea-
1.7 The temperature range for use of these calorimetric
3
surements (ICRU) Reports:
dosimetry systems depends on the thermal resistance of the
ICRU Report 34The Dosimetry of Pulsed Radiation
calorimetric materials, on the calibration range of the tempera-
ICRU Report 35Radiation Dosimetry: Electron Beams with
ture sensor, and on the sensitivity of the measurement device.
Energies Between 1 and 50 MeV
1.8 This standard does not purport to address all of the
ICRU Report 80Dosimetry Systems for use in Radiation
safety concerns, if any, associated with its use. It is the
Processing
responsibility of the user of this standard to establish appro-
ICRU Report 85aFundamental Quantities and Units for
Ionizing Radiation
1
This practice is under the jurisdiction of ASTM Committee E61 on Radiation
2
Processing and is the direct responsibility of Subcommittee E61.02 on Dosimetry For referenced ASTM and ISO/ASTM standards, visit the ASTM website,
Systems, and is also under the jurisdiction of ISO/TC 85/WG 3. www.astm.org, or contact ASTM Customer Service at service@astm.org. For
Current edition approved Jan. 15, 2020. Published February 2020. Originally Annual Book of ASTM Standards volume information, refer to the standard’s
published as E1631–94. The present Fourth Edition of International Standard Document Summary page on the ASTM website.
3
ISO/ASTM 51631:2020(E) is a minor revision of the Third Edition of ISO/ASTM Available from the Commission on Radiation Units and Measurements, 7910
51631–2013(E). Woodmont Ave., Suite 800, Bethesda, MD 20814, U.S.A.
© ISO/ASTM International 2020 – All rights reserved
1
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ISO/ASTM 51631:2020(E)
2.4 Joint Committee for Guides in Metrology (JCGM) 3.2.9 thermistor—electrical resistor with a well-defined re-
Reports:
...
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.
ISO/ASTM 51631:2013(E)
ISO/ASTM 51631 − 2020(E)
Standard Practice for
Use of Calorimetric Dosimetry Systems for Electron Beam
Dose Measurements and Routine Dosimetry System
1
Calibration in Electron Beams
This standard is issued under the fixed designation ISO/ASTM 51631; 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
1.1 This practice covers the preparation and use of semi-adiabatic calorimetric dosimetry systems for measurement of absorbed
dose and for calibration of routine dosimetry systems when irradiated with electrons for radiation processing applications. The
calorimeters are either transported by a conveyor past a scanned electron beam or are stationary in a broadened beam.
1.2 This document is one of a set of standards that provides recommendations for properly implementing dosimetry in radiation
processing, and describes a means of achieving compliance with the requirements of ASTMISO/ASTM Practice E262852628 for
a calorimetric dosimetry system. It is intended to be read in conjunction with ASTMISO/ASTM Practice E262852628.
1.3 The calorimeters described in this practice are classified as Type II dosimeters on the basis of the complex effect of influence
quantities. See ASTMISO/ASTM Practice E262852628.
1.4 This practice applies to electron beams in the energy range from 1.5 to 12 MeV.
1.5 The absorbed dose range depends on the calorimetric absorbing material and the irradiation and measurement conditions.
Minimum dose is approximately 100 Gy and maximum dose is approximately 50 kGy.
-1
1.6 The average absorbed-dose rate range shall generally be greater than 10 Gy·s .
1.7 The temperature range for use of these calorimetric dosimetry systems depends on the thermal resistance of the calorimetric
materials, on the calibratedcalibration range of the temperature sensor, and on the sensitivity of the measurement device.
1.8 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.
1.9 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:
E170 Terminology Relating to Radiation Measurements and Dosimetry
E666 Practice for Calculating Absorbed Dose From Gamma or X Radiation
E668 Practice for Application of Thermoluminescence-Dosimetry (TLD) Systems for Determining Absorbed Dose in
Radiation-Hardness Testing of Electronic Devices
E2628E3083 Practice for Dosimetry in Radiation ProcessingTerminology Relating to Radiation Processing: Dosimetry and
Applications
E2701 Guide for Performance Characterization of Dosimeters and Dosimetry Systems for Use in Radiation Processing
1
This practice is under the jurisdiction of ASTM Committee E61 on Radiation Processing and is the direct responsibility of Subcommittee E61.02 on Dosimetry Systems,
and is also under the jurisdiction of ISO/TC 85/WG 3.
ε1
Current edition approved Aug. 16, 2012Jan. 15, 2020. Published April 2013February 2020. Originally published as E 1631 – 94. ASTM E 1631 – 96The present was
adopted by ISO in 1998 with the intermediate designation ISO 15568:1998(E). The present Fourth Edition of International Standard ISO/ASTM 51631:2013(E) replaces ISO
15568 and 51631:2020(E) is a majorminor revision of the last previous edition ISO/ASTM 51631–2003(E).Third Edition of ISO/ASTM 51631–2013(E).
2
For referenced ASTM and ISO/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.
© ISO/ASTM International 2020 – All rights reserved
1
---------------------- Page: 1 ----------------------
ISO/ASTM 51631:2020(E)
2
2.2 ISO/ASTM Standards:
51261 Practice for Calibration of Routine Dosimetry Systems for Radiation Processing
51431 Practice for Dosimetry in Electron and X-Ray (Bremsstrahlung) Irradiation Facilities for Food Processing
51649 Practice for Dosimetry in an Electron Beam Facility for Radiation P
...
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