Reference number
ISO 24459:2021
International Standard
ISO 24459:2021
Determination of uranium content in samples coming from the nuclear fuel cycle by L-absorption edge spectrometry
Edition 1
2021-10
Read sample
ISO 24459:2021
78821
Published (Edition 1, 2021)

ISO 24459:2021

ISO 24459:2021
78821
Language
Format
CHF 96
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Abstract

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.

General information

  •  : Published
     : 2021-10
    : International Standard published [60.60]
  •  : 1
     : 13
  • ISO/TC 85/SC 5
    27.120.30 
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