ASTM E263-18
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Iron

Standard No.

ASTM E263-18

Release Date

2018

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM E263-18

Scope

1.1 This test method describes procedures for measuring reaction rates by the activation reaction 54 Fe(n,p)54 Mn. 1.2 This activation reaction is useful for measuring neutrons with energies above approximately 2.2 MeV and for irradiation times up to about three years, provided that the analysis methods described in Practice E261 are followed. If dosimeters are analyzed after irradiation periods longer than three years, the information inferred about the fluence during irradiation periods more than three years before the end of the irradiation should not be relied upon without supporting data from dosimeters withdrawn earlier. 1.3 With suitable techniques, fission-neutron fluence rates above 108 cm−2 ·s−1 can be determined. However, in the presence of a high thermal-neutron fluence rate (for example, >2 × 1014 cm−2 ·s−1 ) 54 Mn depletion should be investigated. 1.4 Detailed procedures describing the use of other fastneutron 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 E263-18 Referenced Document

• ASTM D1193 Standard Specification for Reagent Water
• 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 E263-18 history

• 2018 ASTM E263-18 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Iron
• 2013 ASTM E263-13 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Iron
• 2009 ASTM E263-09 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Iron
• 2005 ASTM E263-05 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Iron
• 2000 ASTM E263-00 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Iron