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<p>This study investigates the evaporation and deposition of iodine from lead–bismuth eutectic (LBE) systems with iodine mole fractions of 10<sup>–5</sup> to 10<sup>–3</sup>, crucial for the safety of LBE-cooled nuclear reactors. Combining thermosublimatography, morphological analysis and thermodynamic calculations, it identifies PbI<sub>2</sub>&#xa0;and BiI<sub>3</sub>&#xa0;as the two primarily deposited species, while revealing BiI disproportionation. This work provides novel insights into iodine speciation, emphasizing its importance for the safety of LBE-cooled reactors and gives input for advancing experimental setups and modeling approaches for complex nuclear systems.</p>

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Chemical speciation of iodine evaporated from liquid lead–bismuth eutectic investigated by thermosublimatography

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月23日

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  • Lu Liu,
  • Vladislav Zobnin,
  • Ivan Zivadinovic,
  • Robert Eichler,
  • Alexander Vögele,
  • Dominik Herrmann,
  • Alexander Aerts,
  • Patrick Steinegger,
  • Jörg Neuhausen

摘要

This study investigates the evaporation and deposition of iodine from lead–bismuth eutectic (LBE) systems with iodine mole fractions of 10–5 to 10–3, crucial for the safety of LBE-cooled nuclear reactors. Combining thermosublimatography, morphological analysis and thermodynamic calculations, it identifies PbI2 and BiI3 as the two primarily deposited species, while revealing BiI disproportionation. This work provides novel insights into iodine speciation, emphasizing its importance for the safety of LBE-cooled reactors and gives input for advancing experimental setups and modeling approaches for complex nuclear systems.