Research on natural circulation optimization of primary system
In light of the need to enhance reactor's operational efficiency and safety performance,this paper presents the computation model for the natural circulation of the primary loop in a PWR.A hybrid multi-objective genetic algorithm is applied to the optimization of the design,targeting the reduction of the pressure vessel height and the augmentation of the flow rate of natural circulated coolant.The findings of this study indicate that,in the pursuit of minimizing the pressure vessel height,there was a 19.21%reduction in overall height,coupled with a 9.64%decrease in the coolant flow rate.In the scenario aiming to maximize the coolant flow rate,the total height of the pressure vessel increased by 12.25%,while the coolant flow rate experienced a significant enhancement of 29.26%.