Heat removal and hybrid ventilation characteristics of a vertical dry storage cask for spent nuclear fuel

摘要

Computational fluid dynamics (CFD) was used in this study to numerically simulate the heat removal and hybrid ventilation characteristics of a vertical dry storage cask for spent nuclear fuel. The parameters included a Grashof number of 1.0x1011, an approaching wind incidence angle of 0 degrees or 45 degrees, and a Reynolds number (Re) of 2.7 x 104 -8.0 x 105 (Gr/Re2 = 0.15 -137). As shown by the results, the buoyant airflow dominated the heat removal capability of the cask at low Re (2.7 x 104). When the Re was increased to 5.3 x 104 -1.3 x 105, the wind-induced channel airflow compromised the buoyant airflow, thus reducing the heat removal capacity of the cask. When the Re was 2.7 x 105, the wind-induced airflow dominated.