About us
Espace utilisateur
INSTN offers more than 40 diplomas from operator level to post-graduate degree level. 30% of our students are international students.
Professionnal development
Professionnal development
Find a training course
INSTN delivers off-the-self or tailor-made training courses to support the operational excellence of your talents.
Human capital solutions
At INSTN, we are committed to providing our partners with the best human capital solutions to develop and deliver safe & sustainable projects.
Home   /   Thesis   /   Radial transfers modeling in PWR cores

Radial transfers modeling in PWR cores

Engineering sciences Mathematics - Numerical analysis - Simulation Thermal energy, combustion, flows


The goal is to model the radial transfer terms for 3D flows within fuel bundles of PWR cores. The industrial context consists in the thermal-hydraulics safety code CATHARE 3 that has to reproduce 3D effects when strong assymmetries occur in specific accidental configurations while computing the whole core geometry. The main term to be modeled is the rods drag, that depends on the flow regime and its incidence angle. We will first consider only single-phase situations.
The modelling work will rely upon both the experimental data from the METERO-V rig and LES computations obtained with the TrioCFD code.
Advection momentum radial transfers will have to be properly identified to not be confused with diffusion phenomena and to allow for proper modelling. Finally this work will be extended to a 2-fluid configuration (either dispersed bubbles or droplets, to be defined). This will shift the focus onto modelling the 3D interfacial friction, two-phase friction multplier and void dispersion terms. At this point the goal will be to extend further the CATHARE 3 prediction capabilities for 3D flows in fuel bundles, for use in specific two-fluid conditions.


Département de Modélisation des Systèmes et Structures
Service de Thermohydraulique et de Mécanique des Fluides
Laboratoire de Modélisation et simulation à l’Echelle Système
Top envelopegraduation-hatlicensebookuserusersmap-markercalendar-fullbubblecrossmenuarrow-down