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ASTM D 3649 : 2023

Current

Current

The latest, up-to-date edition.

Standard Practice for High-Resolution Gamma-Ray Spectrometry of Water

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

07-28-2023

1.1This practice covers the measurement of gamma-ray emitting radionuclides in water by means of gamma-ray spectrometry. It is applicable to nuclides emitting gamma-rays with energies greater than 45 keV. For typical counting systems and sample types, activity levels of about 40 Bq are easily measured and sensitivities as low as 0.4 Bq are found for many nuclides. Count rates in excess of 2000 counts per second should be avoided because of electronic limitations. High count rate samples can be accommodated by dilution, by increasing the sample to detector distance, or by using digital signal processors.

1.2This practice can be used for either quantitative or relative determinations. In relative counting work, the results may be expressed by comparison with an initial concentration of a given nuclide which is taken as 100 %. For quantitative measurements, the results may be expressed in terms of known nuclidic standards for the radionuclides known to be present. This practice can also be used just for the identification of gamma-ray emitting radionuclides in a sample without quantifying them. General information on radioactivity and the measurement of radiation has been published (1,2).2 Information on specific application of gamma spectrometry is also available in the literature (3-5). See also the referenced ASTM Standards in 2.1 and the related material section at the end of this standard.

1.3This standard does not purport to address 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 limitation prior to use.

1.4This 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.

Committee
D 19
DocumentType
Standard Practice
Pages
8
PublisherName
American Society for Testing and Materials
Status
Current
Supersedes

ASTM C 1402 : 2017 Standard Guide for High-Resolution Gamma-Ray Spectrometry of Soil Samples
ASTM C 1295 : 2015 Standard Test Method for Gamma Energy Emission from Fission and Decay Products in Uranium Hexafluoride and Uranyl Nitrate Solution
ASTM D 4785 : 2020 Standard Test Method for Low-Level Analysis of Iodine Radioisotopes in Water
ASTM D 7784 : 2020 Standard Practice for the Rapid Assessment of Gamma-ray Emitting Radionuclides in Environmental Media by Gamma Spectrometry
ASTM D 3454 : 2021 Standard Test Method for Radium-226 in Water

ASTM D 1129 : 2013 : R2020 : EDT 2 Standard Terminology Relating to Water
ASTM D 1129 : 2013 : R2020 : EDT 1 Standard Terminology Relating to Water

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