Abstract
The sodium-heated steam generator plays a crucial role in the operation and safety of sodium-cooled fast reactor. The configuration with multiple steam generators poses challenges to the feedwater control system design. Therefore, it is necessary to develop an appropriate dynamic model and investigate its dynamics. The dynamic model is derived by applying mass, energy and momentum conservation equations and lumped-parameter approach. Steady-state calculations were performed and the results agreed well with those obtained from a thermal-hydraulic design code and the design parameters. Transient simulations were carried out by introducing step disturbances to the inputs. The system responses were analyzed and the dynamics were investigated. Unsymmetrical conditions were also simulated to study the interaction responses of different channels. Through analysis, the results were reasonable in theory. Therefore, the developed model can predict the dynamics of the feedwater system with multiple steam generators and can be used for feedwater control system design.
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