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ASTM E261-16(2021)

Historical Reaffirmation

Standard Practice for Determining Neutron Fluence, Fluence Rate, and Spectra by Radioactivation Techniques

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1.1 This practice describes procedures for the determination of neutron fluence rate, fluence, and energy spectra from the radioactivity that is induced in a detector specimen.

1.2 The practice is directed toward the determination of these quantities in connection with radiation effects on materials.

1.3 For application of these techniques to reactor vessel surveillance, see also Test Methods E1005.

1.4 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.

Note 1: Detailed methods for individual detectors are given in the following ASTM test methods: E262, E263, E264, E265, E266, E343, E393, E481, E523, E526, E704, E705, and E854.

1.5 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.


5.1 Transmutation Processes—The effect on materials of bombardment by neutrons depends on the energy of the neutrons; therefore, it is important that the energy distribution of the neutron fluence, as well as the total fluence, be determined.

SDO ASTM: ASTM International
Document Number E261
Publication Date Sept. 1, 2021
Language en - English
Page Count 15
Revision Level 16(2021)
Supercedes
Committee E10.05
Publish Date Document Id Type View
Oct. 1, 2016 E0261-16 Revision
June 1, 2015 E0261-15 Revision
Jan. 1, 2010 E0261-10 Revision
July 10, 2003 E0261-03 Revision
Jan. 10, 1998 E0261-98 Revision
Sept. 1, 2021 E0261-16R21 Reaffirmation