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Deguchi, Yoshihiro*; Imanaka, Koichi*; Takata, Takashi*; Yamaguchi, Akira*; Kikuchi, Shin; Ohshima, Hiroyuki
Proceedings of 3rd Asian Symposium on Computational Heat Transfer and Fluid Flow (ASCHT 2011) (CD-ROM), 6 Pages, 2011/09
In a sodium-cooled fast reactor (SFR), liquid sodium is used as a heat transfer fluid because of its excellent heat transport capability. On the other hand, it has strong chemical reactivity with water vapor. One of the design basis accidents of the SFR is the water leakage into the liquid sodium flow by a breach of heat transfer tubes. This process ends up damages on the heat transport equipment in the SFR. Therefore, the study on sodium-water chemical reactions is of paramount importance for security reasons. This study aims to clarify the sodium-water reaction mechanisms using an elementary reaction analysis. As a result of the analysis, It was demonstrated that the main reaction is Na+H
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NaOH+H as gas-phase reaction.
Deguchi, Yoshihiro*; Imanaka, Koichi*; Takata, Takashi*; Yamaguchi, Akira*; Kikuchi, Shin; Ohshima, Hiroyuki
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If the heat transfer tube in the steam generator of a sodium-cooled fast reactor is failed, high pressurized water vapor blows into the liquid sodium and the sodium-water reaction (SWR) takes place. Japan Atomic Energy Agency has been developing a multi-dimensional sodium-water reaction code for the analytical evaluation of this reaction. One of the items of code development is to construct the applicable chemical model for SWR. In this study, elementary reaction model has been developed for the purpose of identifying the dominant overall reactions for SWR. Also, we applied this model to the sodium-water counter-flow reaction field and evaluated the major reaction pathways.