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<p>We conduct an experimental study to search for the urgently needed method for routine, no sample pretreatment, in-situ, and less-destructive analysis of Hydrogen (H) content in Zircaloy-4 tube used as radioactive fuel container in light water nuclear power plant. For this purpose, we implemented laser-induced breakdown spectroscopy (LIBS) in Helium (He) surrounding gas at a relatively low pressure of around 3&#xa0;kPa and low laser energy of 17&#xa0;mJ. In addition, we designed a new compact and portable sample chamber accommodating an open end so the chamber can tightly fit the Zircaloy-4 tube surface. Inside the chamber we put electrodes to apply an additional electric field. We found that applying an electric field in the plasma expansion region increases the H emission intensity by a factor of 6. Consequently, the H I 656.2&#xa0;nm emission line obtained from the Zircaloy-4 sample containing H of 11 ppm impurity featuring a sharp linewidth (0.1&#xa0;nm) with high signal-to-noise ratio (S/<i>N</i> = 120). Thus, it offers potential applications to non-destructive H analysis in Zircaloy-4 tubes used in light water nuclear power plant. The detection limit of H was estimated less than 0.26 ppm, well below the sensitivity limit of around 600 ppm required for the regular inspection of Zircaloy-4 tubes in light water nuclear power plant.</p>

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Highly sensitive hydrogen analysis employing low pressure laser induced breakdown spectroscopy in helium surrounding gas under electric field

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月22日

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  • Indra Karnadi,
  • Marincan Pardede,
  • Rinda Hedwig,
  • Ivan Tanra,
  • Maria Margaretha Suliyanti,
  • Marvin Yonathan Hadiyanto,
  • Eric Jobiliong,
  • Ihan Martoyo,
  • Zener Sukra Lie,
  • Kiichiro Kagawa,
  • Tjung Jie Lie,
  • Koo Hendrik Kurniawan

摘要

We conduct an experimental study to search for the urgently needed method for routine, no sample pretreatment, in-situ, and less-destructive analysis of Hydrogen (H) content in Zircaloy-4 tube used as radioactive fuel container in light water nuclear power plant. For this purpose, we implemented laser-induced breakdown spectroscopy (LIBS) in Helium (He) surrounding gas at a relatively low pressure of around 3 kPa and low laser energy of 17 mJ. In addition, we designed a new compact and portable sample chamber accommodating an open end so the chamber can tightly fit the Zircaloy-4 tube surface. Inside the chamber we put electrodes to apply an additional electric field. We found that applying an electric field in the plasma expansion region increases the H emission intensity by a factor of 6. Consequently, the H I 656.2 nm emission line obtained from the Zircaloy-4 sample containing H of 11 ppm impurity featuring a sharp linewidth (0.1 nm) with high signal-to-noise ratio (S/N = 120). Thus, it offers potential applications to non-destructive H analysis in Zircaloy-4 tubes used in light water nuclear power plant. The detection limit of H was estimated less than 0.26 ppm, well below the sensitivity limit of around 600 ppm required for the regular inspection of Zircaloy-4 tubes in light water nuclear power plant.