Experimental study of heat transfer in the complex space of small steel containment with a steam jet

Abstract

Compared with large reactors, the internal structure of small reactors is more compact, and the heat capacity is smaller. The experiments were carried out under various jet velocities, sizes, and horizontal locations to study the heat transfer phenomenon caused by steam jet in a small containment with a complex structure. The results show that the overall temperature distribution in the containment is the same under different jet flow factors. Below the break, the temperature increases with height, and above the break, maintaining the same temperature without thermal stratification. The higher the jet velocity, the higher the overall temperature. As the size of the break increases, the jet velocity decreases, and the circulation in the containment slows down, resulting in the temperature rises. There is no significant difference in temperature field with various jet horizontal locations.