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ASTM E 264 : 2019

Current

Current

The latest, up-to-date edition.

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

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

13-05-2019

€49.35
Excluding VAT

This test method covers procedures for measuring reaction rates by the activation reaction 58Ni(n,p)58Co.

Committee
E 10
DocumentType
Test Method
Pages
4
PublisherName
American Society for Testing and Materials
Status
Current
Supersedes

1.1This test method covers procedures for measuring reaction rates by the activation reaction 58Ni(n,p)58Co.

FIG. 1 R Correction Values as a Function of Irradiation Time and Neutron Flux

 Correction Values as a Function of Irradiation Time and Neutron Flux  Correction Values as a Function of Irradiation Time and Neutron Flux

Note 1:The burnup corrections were computed using effective burn-up cross sections of 1650 b for  58Co(n,γ) and 1.4E5 b for  58mCo(n,γ).

1.2This activation reaction is useful for measuring neutrons with energies above approximately 2.1 MeV and for irradiation times up to about 200 days in the absence of high thermal neutron fluence rates, provided that the analysis methods described in Practice E261 are followed. If dosimeters are analyzed after irradiation periods longer than 200 days, the information inferred about the fluence during irradiation periods more than 200 days before the end of the irradiation should not be relied upon without supporting data from dosimeters withdrawn earlier.

1.3With suitable techniques fission-neutron fluence rates densities above 107 cm−2·s −1 can be determined.

1.4Detailed procedures for other fast-neutron detectors are referenced in Practice E261.

1.5The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.6This 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.

1.7This 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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