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Design a Controller to Control the Three Axial Offsets in Load Following Operation for Bushehr Reactor Core

Dogoharani, Negar | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52622 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Vosoughi, Naser; Ghofrani, Mohammad Bagher
  7. Abstract:
  8. Load following operations on PWRs that Adjusted based on demand of network electricity, in fact is not easy, because of the complex conditions of the reactor heart.One of the reasons for the complexity when changing the reactor power level is the production of Xe in the heart and its associated oscillations, which also cause oscillations in the power distribution.Many studies have been performed on the control of xe oscillations based on solving complex mathematical problems and neutron diffusion equations. But what is the research method of choice is the simple and practical TRIAX method. In this method by Convergence control of elliptic trajectory related to three axial offset (Axial offset of power distribution, Axial offset of xenon and Axial offset of iodine) to the origin by the control rods, the effect of Xe oscillations is controlled. The amount and direction of movement of the control rods is determined by the fuzzy controller designed. The amount and direction of movement of the control rods is determined by the designed fuzzy controller.The results show the ability of the controller to remove the oscillations of power distribution and being Axial offset factor In the allowed range (0.05, -0.05), If the convergence of the ellipse in maintained at the closest point to the origin of the coordinates (0,0).Previously this method is used in Iran With reactor heart outputs From the simulink of MATLAB ,with two-point computation. But in this study, along with the reactor heart outputs from Dynco Dynamic Code, which offers a more realistic model of the reactor heart, the appropriate fuzzy controller is designed and used for the TRIAX method. The present study shows that With a detailed Recognition of the basic rules governing the TRIAX method And implement them as fuzzy rules Despite the relative simplicity of the controller structure compared to previous research, The effect of Xe oscillations on power distribution Well controlled
  9. Keywords:
  10. Power Distribution ; Xenon Oscillation ; Three Axial offset Control ; DynCo Dynamic Code ; Load Following Operation

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