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ASTM E 1297 : 2018

Current

Current

The latest, up-to-date edition.

Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Niobium

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

01-06-2018

€56.53
Excluding VAT

Committee
E 10
DocumentType
Test Method
Pages
7
PublisherName
American Society for Testing and Materials
Status
Current
Supersedes

1.1This test method describes procedures for measuring reaction rates by the activation reaction 93Nb(n,n) 93mNb.

1.2This activation reaction is useful for monitoring neutrons with energies above approximately 0.5 MeV and for irradiation times up to about 48 years (three half-lives), provided that the analysis methods described in Practice E261 are followed.

1.3With suitable techniques, fast-neutron reaction rates for neutrons with energy distribution similar to fission neutrons can be determined in fast-neutron fluences above about 1016 cm−2. In the presence of high thermal-neutron fluence rates (>1012cm−2·s−1), the transmutation of 93mNb due to neutron capture should be investigated. In the presence of high-energy neutron spectra such as are associated with fusion and spallation sources, the transmutation of 93mNb by reactions such as (n,2n) may occur and should be investigated.

1.4Procedures for other fast-neutron monitors are referenced in Practice E261.

1.5Fast-neutron fluence rates can be determined from the reaction rates provided that the appropriate cross section information is available to meet the accuracy requirements.

1.6The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.7This 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.

1.8This 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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ASTM D 1193 : 1977 : R1983 : EDT 1 Standard Specification for Reagent Water
ASTM E 1018 : 2009 : R2013 : EDT 1 Standard Guide for Application of ASTM Evaluated Cross Section Data File
ASTM E 456 : 2013 : REV A : R2022 : EDT 1 Standard Terminology Relating to Quality and Statistics
ASTM E 262 : 2017 : R2024 : EDT 1 Standard Test Method for Determining Thermal Neutron Reaction Rates and Thermal Neutron Fluence Rates by Radioactivation Techniques
ASTM E 170 : 2024 Standard Terminology Relating to Radiation Measurements and Dosimetry
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ASTM E 170 : 2020 Standard Terminology Relating to Radiation Measurements and Dosimetry
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ASTM E 944 : 1996 Standard Guide for Application of Neutron Spectrum Adjustment Methods in Reactor Surveillance, (IIA)
ASTM E 1006 : 1996 Standard Practice for Analysis and Interpretation of Physics Dosimetry Results for Test Reactors, E 706(II)
ASTM D 1193 : 2006 : R2011 Standard Specification for Reagent Water
ASTM E 261 : 2016 Standard Practice for Determining Neutron Fluence, Fluence Rate, and Spectra by Radioactivation Techniques
ASTM E 170 : 2023 Standard Terminology Relating to Radiation Measurements and Dosimetry
ASTM E 1018 : 2009 Standard Guide for Application of ASTM Evaluated Cross Section Data File, Matrix E 706 (IIB)
ASTM D 1193 : 1991 Standard Specification for Reagent Water
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ASTM D 1193 : 1970 Standard Specification For Reagent Water
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ASTM E 261 : 2016 : R2021 Standard Practice for Determining Neutron Fluence, Fluence Rate, and Spectra by Radioactivation Techniques
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