Thermochromatographic behavior of iodine in fused silica columns when evaporated from lead–bismuth eutectic

Research output: Contribution to journalArticle

Authors

  • Erik Karlsson
  • Jörg Neuhausen
  • Robert Eichler
  • Alexander Aerts
  • Ivan Danilov
  • Alexander Vögele
  • Andreas Türler

Institutes & Expert groups

  • PSI - Paul Scherrer Institute

Documents & links

Abstract

As a step toward licensing a lead–bismuth eutectic (LBE) based reactor design, the adsorption behavior of iodine evaporated from LBE on fused silica was examined. Using inert and reducing carrier gases, depositions with an adsorption enthalpy of − 95 to − 113 kJ mol ⁻¹ were observed. These depositions are compatible with a single species, tentatively identified as bismuth monoiodide, BiI. When introducing oxidizing conditions, multiple iodine species with higher volatility form, with adsorption enthalpies ranging from − 67 to − 86 kJ mol ⁻¹ . Based on an empirical correlation one of these species was identified as monatomic iodine. This work provides fundamental understanding of the LBE/iodine gaseous chemistry and related adsorption deposition behavior.

Details

Original languageEnglish
Pages (from-to)1249-1258
Number of pages10
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume326
Issue number2
DOIs
Publication statusPublished - Nov 2020

Keywords

  • Lead–bismuth eutectic, Iodine, Accelerator driven sysem, Fission product, Thermochromatography

ID: 7004647