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<p>The processing of fast critical assembly (FCA) spent nuclear fuel requires frequent fluoride concentration monitoring. Researchers generated two FCA spent nulcear fuel simulant test standards at 1130&#xa0;mg/L fluoride and at 524&#xa0;mg/L fluoride for validation of an ion chromatography method of analysis. Additionally, personnel examined FCA spent nuclear fuel process samples containing transition metals, such as iron and nickel, that are known to cause accuracy issues due to matrix effects. Elevated fluoride concentrations were observed on two different anion analytical columns if transition metals were not removed prior to analysis. The final operating method removes interferents using Solid Phase Extraction prior to analysis by ion chromatography. The analytical method using either analytical column yielded concentrations within 5% of the nominal FCA spent nuclear fuel process concentration of 570 ± 57&#xa0;mg/L.</p>

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Fluoride analysis by ion chromatography in support of fast critical assembly (FCA) spent nuclear fuel processing

  • 期刊论文

  • 发表日期：

    2025年12月16日

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  • Thomas L. White,
  • Lauren M. Carter

摘要

The processing of fast critical assembly (FCA) spent nuclear fuel requires frequent fluoride concentration monitoring. Researchers generated two FCA spent nulcear fuel simulant test standards at 1130 mg/L fluoride and at 524 mg/L fluoride for validation of an ion chromatography method of analysis. Additionally, personnel examined FCA spent nuclear fuel process samples containing transition metals, such as iron and nickel, that are known to cause accuracy issues due to matrix effects. Elevated fluoride concentrations were observed on two different anion analytical columns if transition metals were not removed prior to analysis. The final operating method removes interferents using Solid Phase Extraction prior to analysis by ion chromatography. The analytical method using either analytical column yielded concentrations within 5% of the nominal FCA spent nuclear fuel process concentration of 570 ± 57 mg/L.