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MARLA is the Studsvik software for the automated design and analysis of a fuel shuffle.
Examples based on the KAIST-3A benchmark core, as well as a simplified Westinghouse AP-1000 configuration, demonstrate the power of this new framework for tackling in a coupled, multiscale manner crucial reactor phenomena such as CRUD-induced power shift and fuel shuffle.
MARLA performs all tasks related to planning the fuel shuffle, including the optimisation of the fuel movement schedule, a complete shutdown margin analysis of all intermediate core configurations using the licensing-grade SIMULATE-3 nodal code, and generation of the official Fuel Movement Checklist used by the crane operators during core alterations.
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Power peaking factor of the inward fuel shuffling strategy decreases with the increase of fuel shuffling period exponentially, while that of the outward fuel shuffling strategy increases with the fuel shuffling period exponentially.
Secondly, the core critical features and radial power peaking factors of the inward and outward fuel shuffling strategy under different fuel shuffling periods are carried out.
The fuel shuffling mode is similar to that of the equilibrium state.
In this paper, performance of radial fuel shuffling of sodium cooled Breed and Burn reactor core is investigated.
Fuel shuffling is also confined within each own flow pass because of the different structure of assemblies.
The results show that keff of the beginning of equilibrium cycle (BOEC) and end of equilibrium cycle (EOEC) of both the inward and outward fuel shuffling strategy parabolically vary with the fuel shuffling period.
A new design concept of Super FBR has been proposed with "with multi-axial fuel shuffling", which has flexibility in designing fuel shuffling schemes in the lower part and upper part of the core independently.
In this paper, a preliminary board type radial fuel shuffling sodium cooled breed and burn reactor core is designed.
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