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Kawaguchi, Munemichi; Doi, Daisuke; Masuyama, Daisuke; Seino, Hiroshi; Konishi, Kensuke; Miyahara, Shinya
no journal, ,
As the purpose of investigation on terminating mechanism of Na-concrete reaction, the long-time test in which Na continued to be heated than threshold temperature was conducted. Under the condition that enough amount of Na existed and continued to be heated, we confirmed that the reaction stopped.
Kawaguchi, Munemichi*; Miyahara, Shinya; Uno, Masayoshi*
no journal, ,
Though the steel liner is set up to prevent Na contacting with the concrete in the case of Na leakage in the Na-cooled fast reactor, it is important to grasp the Na-concrete reaction mechanism. The past studies have focused on the thermal, concrete ablation and hydrogen release behaviors. Also the natural termination of this reaction was confirmed experimentally; it was pointed out that the sedimentation of the reaction products was one of the terminating causes. This paper is reported on a discussion such as thermodynamics calculations of the reaction products, related with the Na-concrete reaction terminating study.
Kawaguchi, Munemichi; Miyahara, Shinya; Uno, Masayoshi*
no journal, ,
A calculation on a sodium-concrete reaction behavior was carried out using the phase field method. As part of a study on the reaction terminating mechanism, the calculation results will be presented.
Kawaguchi, Munemichi; Miyahara, Shinya; Uno, Masayoshi*
no journal, ,
To evaluate the chemical reaction process of Na-concrete reaction, the model which adopted the thermodynamic database and the latest chemical reaction kinetics in COMSOL Multiphysics has been developed. The chemical reaction processes at each temperature were simulated well by the numerical calculation with this model.
Kawaguchi, Munemichi; Miyahara, Shinya; Uno, Masayoshi*
no journal, ,
no abstracts in English
Kawaguchi, Munemichi; Miyahara, Shinya; Uno, Masayoshi*
no journal, ,
Sodium-concrete reaction (SCR) experiments in sodium-cooled fast reactors were performed to reveal the phenomena that the reaction gradually terminates by the sedimentation effect of the reaction products. In addition, some physical properties of the reaction products (density, specific heat, melting point) were measured after SCR experiment.