Abstract
Hydrous pyrolysis using superheated steam was demonstrated for safe storage of a radioactive-Cs-adsorbed adsorbent based on Prussian blue. Iron oxidation and CN decomposition in the adsorbent were observed at 500 °C. After hydrous pyrolysis, almost all the adsorbed Cs remained in the decomposition products. Results show that this method effectively avoids thermal runaway caused by exothermic reactions like iron oxide formation.
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