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ASTM International - ASTM E705-18

Standard Test Method for Measuring Reaction Rates by Radioactivation of Neptunium-237

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Organization: ASTM International
Publication Date: 1 December 2018
Status: active
Page Count: 6
ICS Code (Radiation measurements): 17.240
ICS Code (Fissile materials and nuclear fuel technology): 27.120.30
significance And Use:

5.1 Refer to Practice E261 for a general discussion of the determination of fast-neutron fluence rate with fission detectors.

5.2 237Np is available as metal foil, wire, or oxide... View More

scope:

1.1 This test method covers procedures for measuring reaction rates by assaying a fission product (F.P.) from the fission reaction  237Np(n,f)F.P.

1.2 The reaction is useful for measuring neutrons with energies from approximately 0.7 to 6 MeV and for irradiation times up to 90 years, provided that the analysis methods described in Practice E261 are followed. If dosimeters are analyzed after irradiation periods longer than 90 years, the information inferred about the fluence during irradiation periods more than 90 years before the end of the irradiation should not be relied upon without supporting data from dosimeters withdrawn earlier.

1.3 Equivalent fission neutron fluence rates as defined in Practice E261 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.

Document History

ASTM E705-18
December 1, 2018
Standard Test Method for Measuring Reaction Rates by Radioactivation of Neptunium-237
5.1 Refer to Practice E261 for a general discussion of the determination of fast-neutron fluence rate with fission detectors. 5.2 237Np is available as metal foil, wire, or oxide powder. For further...
August 1, 2013
Standard Test Method for Measuring Reaction Rates by Radioactivation of Neptunium-237
5.1 Refer to Practice E261 for a general discussion of the determination of fast-neutron fluence rate with fission detectors. 5.2 237Np is available as metal foil, wire, or oxide powder. For further...
June 1, 2013
Standard Test Method for Measuring Reaction Rates by Radioactivation of Neptunium-237
5.1 Refer to Practice E261 for a general discussion of the determination of fast-neutron fluence rate with fission detectors. 5.2 237Np is available as metal foil, wire, or oxide powder. For further...
July 1, 2008
Standard Test Method for Measuring Reaction Rates by Radioactivation of Neptunium-237
Refer to Practice E 261 for a general discussion of the determination of fast-neutron fluence rate with fission detectors. 237Np is available as metal foil, wire, or oxide powder. For further...
January 10, 1996
Standard Test Method for Measuring Reaction Rates by Radioactivation of Neptunium-237
1.1 This test method covers procedures for measuring reaction rates by assaying a fission product (F.P.) from the fission reaction 237 Np(n,f)F.P. 1.2 The reaction is useful for measuring neutrons...
January 1, 1996
Standard Test Method for Measuring Reaction Rates by Radioactivation of Neptunium-237
1.1 This test method covers procedures for measuring reaction rates by assaying a fission product (F.P.) from the fission reaction 237 Np(n,f)F.P. 1.2 The reaction is useful for measuring neutrons...
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