Modeling and Simulation of Pressure Control Logic Module in Pressurizer of Nuclear Power Plant

Yu, Miao; Zhao, Xian Ping; Niu, Yong; Pan, Yigang

doi:10.4028/www.scientific.net/amr.860-863.2409

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…The pressurizer is equipped to control the pressure of the reactor system. The pressure control is carried out by using the heater and sprayer in the pressurizer tank [10]. Inside the pressurizer, its cylinder is partially filled with water as shown in the simple scheme in Fig.…”

Section: Theory Pressurizer Systemmentioning

confidence: 99%

Simulation of Spray Injection in the Pressurizer Using RELAP5

Dibyo

Susyadi

2017

Atom Indo.

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A modeling research using RELAP5 to assess the pressurizer of a pressurized water reactor (PWR) power plant has been performed. The heater and water injection systems in the pressurizer system of the PWR are of great importance for system pressure control. The heater is designed to increase the pressure while the water sprayer injection is to perform depressurization. Most of studies conducted in the past mainly focused on determining the effects of nozzle spray design and droplet size using testing loops. The purpose of this simulation is to analyze the spray injection flow rate against the pressure characteristics of the pressurizer using RELAP5. Through this approach, the optimum injection flow rate of full scale plant pressurizer can be analyzed. The parameters investigated are pressure and temperature. In RELAP5, the pressurizer tank was modeled with six volume nodes and the heater was modeled by using heat structure. In the model, the sprayer takes water from the cold leg to inject it into the top of tank region. The results showed that the mass flow of about 4 kg/s is the most effective value to limit pressure in the pressurizer to below 15.7 MPa. However, the flow rates of 8 kg/s and more cause overpressure. This simulation is useful to complement the data related to the water flow rate injection systems of the pressurizer.

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Section: Theory Pressurizer Systemmentioning

confidence: 99%

Simulation of Spray Injection in the Pressurizer Using RELAP5

Dibyo

Susyadi

2017

Atom Indo.

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“…PWR simulator is developed by Suryabrata et al [9] in MATLAB using linearized state space modeling for controller design purposes. A conventional permissive and interlocks-based PWR pressure control module is developed by Yu et al [10] for condition-based logics developed using MATLAB. PID controller-based pressurizer pressure controller is designed by Zhang et al [11] for closed loop model development for 900 MWe PWR nuclear power plant.…”

Section: Introductionmentioning

confidence: 99%

Fractional Order Modeling of PWR Pressurizer Dynamics and Fractional Order Nonlinear H∞ Controllers Design in LabVIEW

Malik

Memon

Arshad

et al. 2022

PPASA

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The novel fractional order intelligent transient dynamics and advanced fractional order nonlinear robust control synthesis scheme of the Pressurized Water Reactor (PWR) pressurizer are addressed in this research work. The Graphical User Interface (GUI) is designed for closed-loop model-based PWR pressurizer dynamical studies in LabVIEW. Based on the demand for power, the reactor power and turbine power are predicted using a fractional order backpropagation algorithm in an open loop configuration. Using turbine power and heater power as input variables, pressurizer level, pressurizer pressure and coolant average temperature as output variables, the open loop multi-input multi-output (MIMO) dynamic model of pressurizer is estimated using fractional order artificial intelligence in LabVIEW. Four fractional order robust nonlinear H∞ sub-controllers are designed for charging flow, spray flow, proportional heaters power and backup heaters power. All the dynamic controller models are in fractional order nonlinear H∞ framework and are designed in LabVIEW. The performance of the proposed design work is evaluated in closed loop configuration at 100 %, 75 % and 15 % in steady state conditions. Dynamic transient analysis is performed from 100% to 90% power reduction scenario and found satisfactory and within design limits and robust bounds.

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Modeling and Simulation of Pressure Control Logic Module in Pressurizer of Nuclear Power Plant

Cited by 2 publications

References 2 publications

Simulation of Spray Injection in the Pressurizer Using RELAP5

Simulation of Spray Injection in the Pressurizer Using RELAP5

Fractional Order Modeling of PWR Pressurizer Dynamics and Fractional Order Nonlinear H∞ Controllers Design in LabVIEW

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