[1F07-10] Boiling and Drying Accident of HLLW, and Pyroprocessing

[1F09] Chlorination of Uranium Oxides - containing Substances with Carbon Tetrachloride by Thermochemical Reaction

*ZhuoRan Ma¹, Yoshiya Homma², Kenji Konashi², Tatsuya Suzuki¹ (1. Nagaoka Univ. of Tech, 2. Tohoku Univ)

Keywords:Actinides analysis, uranium oxides, Nuclear fuel debris, Chemical conversion, Pretreatment

The dissolution of nuclear fuel debris generated from Fukushima nuclear power plant accident is necessary for the accurate and precise analyses of nuclides. We have proposed the chemical conversion of insoluble nuclear fuel debris into soluble substances by thermochemical reaction. In the present work, the chlorination behaviors of UO₂, U₃O₈, simulated nuclear debris including UO₂-ZrO₂-Fe by themochemical reaction with reagent CCl₄ were studied, and the converted substances were analyzed by XRD. We have found that it is possible to achieve the chlorination of these substances at 300℃.