Modeling of ammonia dosing processes in the primary circuit of a VVER-1000 reactor using the MATLAB Simulink environment
Abstract
This paper presents the development and simulation of a control system for ammonia concentration in the primary circuit of a VVER-1000 reactor using Matlab Simulink. The objective of the study is to design a mathematical model of the dosing system, including the pump and control regulator, and to investigate its dynamic behavior under various operating conditions. The research emphasizes the importance of maintaining optimal ammonia concentration to suppress water radiolysis, reduce corrosion rates of structural materials, and ensure the safe and reliable operation of the reactor. A detailed simulation was performed in Simulink, where transfer functions and difference equations describing the object of control were implemented. The study examined system responses to step inputs with different controller gains, analyzing the impact on transient processes and steady- state accuracy. Results demonstrated that the system requires proportional regulation to achieve stable performance. The optimal regulator coefficient was determined. The findings confirm the effectiveness of Matlab Simulink as a modeling environment for control systems in nuclear power applications and lay the groundwork for future integration into real-time environments such as MWBridge.
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List of references
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