• ANSARIFAR, GHOLAM REZA (Department of Nuclear Engineering, Faculty of Advanced Sciences and Technologies, University of Isfahan) ;
  • RAFIEI, MAESAM (Department of Nuclear Engineering, Faculty of Advanced Sciences and Technologies, University of Isfahan)
  • Received : 2014.07.24
  • Accepted : 2014.11.10
  • Published : 2015.02.25


This paper presents findings on the second-order sliding-mode controller for a nuclear research reactor. Sliding-mode controllers for nuclear reactors have been used for some time, but higher-order sliding-mode controllers have the added advantage of reduced chattering. The nonlinear model of Pakistan Research Reactor-1 has been used for higherorder sliding-mode controller design and performance evaluation. The reactor core is simulated based on point kinetics equations and one delayed neutron groups. The model assumes feedback from lumped fuel and coolant temperatures. The effect of xenon concentration is also considered. The employed method is easy to implement in practical applications, and the second-order sliding-mode control exhibits the desired dynamic properties during the entire output-tracking process. Simulation results are presented to demonstrate the effectiveness of the proposed controller in terms of performance, robustness, and stability.


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