Abstract
The investigation of steam bypass and pressure control system (SBPCS) is performed by RETRAN-3D code for Lungmen nuclear power plant. The purposes of this study are: 1) to demonstrate that the dynamic response of SBPCS is capable of controlling the system pressure smoothly when the reactor steam generation exceeds the steam flow used by the turbine, and 2) to study the effect of pressure regulator (PR) on dynamic response. The dynamic response of SBPCS is evaluated by means of the perturbations induced by pressure setpoint changes. The parametric study of SBPCS performs the effect of lead-lag regulator on the dynamic response. Finally, the resultant dynamic responses indicate that the design of SBPCS is capable of damping the system oscillation and bring the system to a stable state.
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