1. Silver as a capturing material for iodine released from lead–bismuth eutectic in various conditions
- Author
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Robert Eichler, Erik Karlsson, Andreas Türler, Alexander Vögele, Ivan I. Danilov, and Jörg Neuhausen
- Subjects
Materials science ,Lead-bismuth eutectic ,Health, Toxicology and Mutagenesis ,Inorganic chemistry ,Scrubber ,chemistry.chemical_element ,010402 general chemistry ,010403 inorganic & nuclear chemistry ,Iodine ,01 natural sciences ,Analytical Chemistry ,law.invention ,Metal ,Adsorption ,law ,Radiology, Nuclear Medicine and imaging ,Spectroscopy ,Eutectic system ,Public Health, Environmental and Occupational Health ,Nuclear reactor ,Pollution ,0104 chemical sciences ,Nuclear Energy and Engineering ,chemistry ,Chemisorption ,visual_art ,visual_art.visual_art_medium - Abstract
The usage of silver as a filtering material for removal of iodine from the gas phase of a lead–bismuth eutectic based nuclear reactor was investigated in various atmospheres representing normal operation as well as accident conditions. Thermochromatography experiments were performed to quantify the retention experienced on a silver surface by iodine species evaporated from a lead–bismuth eutectic sample. Measured adsorption enthalpies ranged from −171 to − 208 kJ mol−1 with observed differences attributed to various surface effects rather than a change in iodine speciation. The postulated adsorption mechanism is chemisorption of iodine atoms on the silver surface. Metallic silver fulfills the desired criteria for a capturing material in water-free filtering systems to be used as an alternative to traditional alkaline scrubbers commonly used in LWR systems.
- Published
- 2021