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Application of Perturbation Theory in Fuel Management Optimization of VVER-1000 Reactor

Hosseini, Mohammad | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41220 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Vossoughi, Nasser
  7. Abstract:
  8. One of the methods to enhance the economic performance and safety factor of nuclear power plants is to determine a suitable fuel loading strategy in a reactor core. Different methods have been already elaborated to choose the proper fuel loading pattern. Selection of the best pattern for fuel loading ensures the best use of fissile material and more safety during reactor operation. Perturbation theory method is one the methods which could be used to solve this kind of problems. The effect of non-uniform perturbations on the reactor operation can be evaluated by multigroup calculations and using proper space dependent group constants. In this study, a C# based program is developed to find the fuel loading pattern for Bushehr nuclear power plant. This program uses CITATION code to calculate core parameters. The optimization is based on minimizing the radial power peaking factor in the core. As a result, the optimization process starts by considering an initial loading pattern and fuel assembly characteristics like diffusion constants, infinite multiplication factor, fuel burn up and etc. which are the inputs of the program. The obtained results from applying the method to Bushehr reactor reveals that the method is fast and highly precise in calculating an efficient loading pattern. The obtained fuel loading pattern by using perturbation theory adds 1.1 days to reactor cycle duration comparing to the reference pattern in addition to keeping the power peaking factor in the allowed limit
  9. Keywords:
  10. Optimization ; Perturbation Theory ; Bushehr Nuclear Power Plant ; Fuel Loading Pattern ; Vodo-Vodyanoi Energetichesky (VVER)1000 ; Power Peaking Factor

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