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Report No.
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Thermal behavior of liquid sodium-calcium carbonate reaction

Kikuchi, Shin  ; Koga, Nobuyoshi*

Under postulated accidental condition of sodium-cooled fast reactor (SFR), liquid sodium spilled into the floor may lead to fail the steel liner. Consequently, sodium (Na)-concrete reaction (SCR) comes to occur by direct contact of liquid sodium with structural concrete. In this study, Na-calcium carbonate (CaCO$$_{3}$$) reaction was investigated using a differential scanning calorimetry (DSC). It was revealed from DSC runs that Na-CaCO$$_{3}$$ reaction initiates at approximately 726 K. Based on the DSC exothermic peaks recorded at different heating rates, kinetic analysis for the Na-CaCO$$_{3}$$ reaction was performed using Kissinger method, and the kinetic results were compared with those reported previously for the reaction of limestone concrete with sodium spill.

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