Study of Safety Injection Tank Performance Using MARS and CFD

Abstract

The APR1400 has four Safety Injection Tanks with fluidic devices to control the flow passively. Because of the complex flow behavior, it is hard to predict the performance of the fluidic device. Therefore, CFD and MARS analyses were performed to compare with experimental results. The accumulator model predicted the results quite well but was not able to model nitrogen entrainment. The pipe model showed little difference in the flow but nitrogen entrainment was too high. CFD results will be introduced in the conference.