FITXS: A fast and flexible burn-up scheme based on the fitting of one-group cross-sections

Annals of Nuclear Energy(2017)

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Abstract
•A new burn-up scheme was developed based on the fitting of one-group cross-sections.•Burn-up models for both fast (GFR) and thermal (EPR) reactors were developed.•The fitted functions describe the cross-sections and the keff with high accuracy.•The developed models can calculate burn-up for a wide range of initial compositions.•Applicability was demonstrated with GFR-LWR fuel cycle simulations.
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Key words
Cross-section parametrization,Burn-up,Fuel cycle,Gas-cooled Fast Reactor,Breeding,Transmutation
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