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Kikuchi, Shin; Koga, Nobuyoshi*
no journal, ,
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
) reaction was investigated using a differential scanning calorimetry (DSC). It was revealed from DSC runs that Na-CaCO reaction initiates at approximately 726 K. Based on the DSC exothermic peaks recorded at different heating rates, kinetic analysis for the Na-CaCO 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.
Koga, Nobuyoshi*; Kikuchi, Shin
no journal, ,
The major structural concretes of sodium-cooled fast reactor (SFR) being tested in Japan are siliceous and perlite concretes. The thermal behavior of the concretes and the reaction behavior between liquid sodium with concretes are necessary information for the safety assessment when considering postulated serious accidents. In this study, the thermal decomposition behavior of the perlite concrete was investigated using a range of thermoanalytical techniques, and the complex reaction behavior was characterized kinetically.