Analysis of three-dimension flow field for boron dilution transient

The boron dilution transient of reactor is simulated using CFX10.0 in this paper. The boron concentration distributions and temperature distributions are obtained for the reactor. The results show that, as temperature of the reactor increases, the resistances fall down and clear water can reach the reactor core quickly, the mixing time between the clear water and borated water reduces, and the mixing effect weakens, with a lower boron concentration at the centre than other parts of the reactor core. (authors)