Numerical Simulation Study on Anti-Wave Problem of Fluid Storage in Pressurizer Under Marine Conditions

Abstract

Under the influence of marine conditions on nuclear powered ships, the liquid storage in the Pressurizer shake violently, which affects the normal operation of the Pressurizer and even causes safety accidents. Therefore, it is extremely urgent to design an anti-wave device for the Pressurizer. This paper studies a Pressurizer model with a ring-shaped plate. Using numerical simulation software, the VOF method is used to couple the k-ε model to simulate the liquid level fluctuation of the two Pressurizers with and without anti-wave device under different external excitation cycles. The phenomenon of internal liquid level fluctuation during movement was analyzed, and the pressure transient change characteristics of the pressure monitoring points arranged on the pressurizer were analyzed, so as to compare the different axial sections and the overall water level shaking amplitude. By comparing the simulation results, it is found that when the external excitation period is T = 2∼2.5s, the ring-shaped plate studied in this study can suppress the shaking of the liquid storage in the Pressurizer significantly.