Modal methods for rehomogenization of nodal cross sections in nuclear reactor core analysis

Matteo Gamarino

Research output: ThesisDissertation (TU Delft)

56 Downloads (Pure)

Abstract

This thesis develops novel first-principle methods to correct homogenization errors in nodal cross sections and discontinuity factors. Its aim is to improve the accuracy of nodal diffusion simulations of heterogeneous core configurations. This research builds upon previous work conducted at Framatome (Paris, France). It is based on a modal reconstruction of variations in the neutron flux distribution (in space and energy) between the core environment and the infinite-medium approximation, which is typically used in lattice transport calculations for few-group constant generation. Focus is given to the correction of the nodal cross sections.
Original languageEnglish
Awarding Institution
  • Delft University of Technology
Supervisors/Advisors
  • Kloosterman, J.L., Supervisor
  • Lathouwers, D., Advisor
Award date20 Nov 2018
Print ISBNs978-94-6186-961-6
DOIs
Publication statusPublished - 2018

Keywords

  • Neutron diffusion
  • Nodal methods
  • Homogenization
  • Core environment
  • Neutron leakage
  • Spectral and spatial effects
  • Cross-section model

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