What is ISO 16424‒ Homogeneity of Gd distribution and Gd2O3 content about?
ISO 16424 is an international standard that discusses aspects of nuclear energy.
ISO 16424 is applicable to the evaluation of the homogeneity of Gd distribution within gadolinium fuel blends. It also applies to the determination of the Gd2O3 content in sintered fuel pellets of Gd2O3+UO2 from 1 percent to 10 percent, by measurements of gadolinium (Gd) and uranium (U) elements using ICP-AES.
After performing measurements of Gd and U elements using ICP-AES, if the statistical methodology is additionally applied, homogeneity of Gd distribution within a Gd fuel pellet lot can also be evaluated.
ISO 16424 specifies the principle, apparatus, reagents, reference solutions, sample preparation, calibration, and analysis of the samples for
Note 1: ISO 16424 covers the statistical methodology only on a limited basis.
Note 2: In ISO 16424, the gadolinium fuel blend represents a mixture of uranium dioxide (UO2) powder and gadolinium oxide (Gd2O3) powder.
Who is ISO 16424‒ Homogeneity of Gd distribution and Gd2O3 content for?
ISO 16424 on the homogeneity of Gd distribution and Gd2O3 content is useful for:
- Firefighting companies
- Test /service providers for fire hazard testing
- Firefighting colleges
Why should you use ISO 16424‒ Homogeneity of Gd distribution and Gd2O3 content?
It is very important to improve the performance of a nuclear reactor through longer cycle lengths or improved purity of fuel utilization. This has given rise to verifying the homogeneity of Gd distribution and Gd2O3 content in fuel blends.
ISO 16424 gives you a methodology for determining homogeneity of Gd distribution and Gd2O3 content in the gadolinium fuel blends. It gives you information to determine the Gd2O3 content of that pellet by calculation based on the stoichiometry of the pellet, by measuring the Gd, U element contents, and oxygen to metal atomic ratio in a gadolinium fuel pellet.
ISO 16424 can possibly help its users to evaluate whether the amount of Gd distribution in the powder is sufficiently homogeneous. It also leads to estimate the actual Gd2O3 content of the pellet after sintering accurately.
Thus, the users of ISO 16424 can also calculate the uranium concentration factor of the powder, so as to obtain accurate uranium accounting data, by using the Gd2O3 content (or Gd content) and the O/M ratio.
What’s changed since the last update?
BS EN ISO 16424:2017 supersedes BS ISO 16424:2012, which is withdrawn.
