ASTM E264-19
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Nickel

Standard No.

ASTM E264-19

Release Date

2019

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM E264-19

Scope

1.1 This test method covers procedures for measuring reaction rates by the activation reaction 58 Ni(n,p)58 Co. 1.2 This 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more than 200 days before the end of the irradiation should not be relied upon without supporting data from dosimeters withdrawn earlier. 1.3 With suitable techniques fission-neutron fluence rates densities above 107 cm−2 ·s−1 can be determined. 1.4 Detailed procedures for other fast-neutron detectors are referenced in Practice E261. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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. 1.7 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.

ASTM E264-19 Referenced Document

• ASTM E1005 Standard Test Method for Application and Analysis of Radiometric Monitors for Reactor Vessel Surveillance, E 706(IIIA)
• ASTM E1018 Standard Guide for Application of ASTM Evaluated Cross Section Data File, Matrix E 706 (IIB)
• ASTM E170 Standard Terminology Relating to Radiation Measurements and Dosimetry
• ASTM E181 Standard Test Methods for Detector Calibration and Analysis of Radionuclides
• ASTM E261 Standard Practice for Determining Neutron Fluence, Fluence Rate, and Spectra by Radioactivation Techniques
• ASTM E844 Standard Guide for Sensor Set Design and Irradiation for Reactor Surveillance, E 706(IIC)
• ASTM E944 Standard Guide for Application of Neutron Spectrum Adjustment Methods in Reactor Surveillance, (IIA)

ASTM E264-19 history

• 2019 ASTM E264-19 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Nickel
• 2008 ASTM E264-08(2013) Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Nickel
• 2008 ASTM E264-08 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Nickel
• 2002 ASTM E264-02 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Nickel
• 1996 ASTM E264-92(1996) Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Nickel
• 1992 ASTM E264-92 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Nickel