Nuclear thermal-hydraulics [ LBNEN2001 ]

SCK REFERENCE PERSONS
Simon Vanmaercke: simon.vanmaercke@sckcen.be

• Reactor heat generation
• Transport equations (single-phase & two-phase flow)
• Thermal analysis of fuel elements
• (Single-phase fluid mechanics and heat transfer)'usually already known
• Two-phase flow dynamics
• Two-phase heat transfer
• Single heated channel; steady state analysis
• Single heated channel; transient analysis
• Flow loops
• Utilisation of established codes and introduction to advanced topics (modelling and thermalhydraulics for GEN4 reactors)

• To be familiarised with various reactor types and their main design and operational characteristics
• To learn how to estimate the volumetric heat generation rate in fission reactor cores under normal operation and shutdown conditions
• To learn how to analyse the thermal performance of nuclear fuel elements
• To learn the basic fluid mechanics of single phase reactor cooling systems
• To learn to calculate pressure drop in reactor systems, including tube bundles, and spacer grids
• To learn to analyse the heat transfer characteristics of single phase reactor cooling systems
• To learn the basic fluid mechanics of two-phase systems, including flow regime maps, void-quality relations, pressure drop, and critical flow
• To learn the fundamentals of boiling heat transfer, and its implications for reactor design
• To learn the fundamentals of core thermal design, with attention to design uncertainty analysis and hot channel factors.

La contribution de cette UE au développement et à la maîtrise des compétences et acquis du (des) programme(s) est accessible à la fin de cette fiche, dans la partie « Programmes/formations proposant cette unité d’enseignement (UE) ».

Closed book - oral

• 2 t.m.: 40h teaching + seminar and 15h practical works in classroom
• SCK.CEN guidance for demonstrations with codes
• SCK.CEN + UCL TA for practical works

• Reactor heat generation
• Transport equations (single-phase & two-phase flow)
• Thermal analysis of fuel elements
• (Single-phase fluid mechanics and heat transfer)'usually already known
• Two-phase flow dynamics
• Two-phase heat transfer
• Single heated channel; steady state analysis
• Single heated channel; transient analysis
• Flow loops
• Utilisation of established codes and introduction to advanced topics (modelling and thermalhydraulics for GEN4 reactors)

• Todreas, N.E. and Kazimi, M.S. Nuclear System I: Thermal Hydraulic Fundamentals, Hemisphere Publishing Corp., New York, 1990.
• Todreas, N. E. and Kazimi, M.S. Nuclear Systems II: Elements of Thermal Hydraulic Design, Hemisphere Publishing Corp., New York, 1990.

Yann BARTOSIEWICZ yann.bartosiewicz@uclouvain.be
Professor at the Université Catholique de Louvain (UCL, Louvain-la-Neuve)
Master in Turbulence modeling and Transfer Phenomena, Ecole Nationale Polytechnique de Grenoble, France, 1998.
PhD in Mechanical engineering, Université de Sherbrooke, Canada, 2003: Modeling of supersonic plasma jets in non-Local Thermodynamics Equilibrium
Research fields: Fluid mechanics, heat transfer, compressible flows, two-phase flows, thermodynamics, computational fluid dynamics
Teaching duties in BNEN: Nuclear Thermal Hydraulics
Other research activities: scientific leader for UCL in European projects in nuclear thermal-hydraulics:
NURESIM: CFD Simulation of instabilities in a stratified two-phase flows relevant to PTS scenario NURISP: Simulation of two-phase chocked flows during LOCA: implementation of non-equilibrium models in CATHARE 3
THINS: Direct and Large Eddy Simulation (DNS/LES) of convective heat transfer for low Prandtl fluids (Liquid metals)
UCL Promotor of other projects in energy
Other duties: Member of the CFD group at OECD, Member of the European Nuclear Engineering Network (ENEN)