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Report No.

Numerical investigation of self-wastage phenomena in steam generator of sodium-cooled fast reactor

Jang, S.*; Takata, Takashi  ; Yamaguchi, Akira*; Uchibori, Akihiro ; Kurihara, Akikazu ; Ohshima, Hiroyuki

Numerical analysis of the self-wastage phenomenon was carried out using a multi-dimensional computational code called SERAPHIM. Several steps of numerical analysis were constructed to reproduce transient self-wastage phenomenon caused by Sodium Water Reaction (SWR). Numerical analysis of multiphase flow with chemical reaction near the initial crack is firstly performed. The wastage amount is evaluated based on hypothetical Arrhenius equation by using the temperature and molar concentration of sodium hydroxide. New analytical grid is created by exchanging the solid cells to fluid cells in the reaction based on the wastage amount evaluation. These series of procedure is repeated. The width and the shape of the enlarged crack showed good agreement with the experimental results.



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