SS-ISO-24459 › Determination of uranium content in samples coming from the nuclear fuel cycle by L-absorption edge spectrometry (ISO 24459:2021, IDT)
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This document specifies a method for the determination of uranium concentrations in nitric acid or TBP-DILUANT (for example TBP-kerosene) solutions coming from the nuclear fuel cycle. The method is applicable for process control of solutions, free of suspension, which contain between 10 g/l to 300 g/l uranium, and for high accuracy purposes (Safeguards) to nitric acid solutions, free of suspension, which contain between 100 g/l and 220 g/l uranium. Having the content of neptunium and plutonium impurities in the solution less than 1 % of the uranium content. the content of neutron poisons (gadolinium, erbium) less than 1 % of the uranium content to ensure the absence of significant interferences at the level of required precision, for high accuracy purposes. The method is applicable to solid samples as well, provided that they can be fully dissolved in nitric acid.
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Designation Name
SS-ISO 24459:2021
Revision Level
2021 EDITION
Status
Superseded
Publication Date
Oct. 12, 2021
Language(s)
English
Page Count
20
International Equivalent
ISO 24459:2021(IDT)