Thermal hydraulics and safety

Objective:

• Describe the various scales of two-phase flow modelling and their significance.
• Present the different formulations of the 1D two-phase flow modelling (number and nature of balance equations, set of dependent variables, closure laws).
• Give practical and relevant examples of thermal hydraulic models in the nuclear field.
• Identify and to discuss the major physical phenomena involved during design basis accident and severe accidents.
• Describe the different scenarios of core degradation and corium interactions during severe accidents.
• Present the hydrogen risk in LWRs.

Content:

• Basic phenomena in single- and two-phase flow.
• Thermal hydraulic phenomena in LWRs.
• Multi-scale approach of LWR thermal hydraulics.
• System code modelling of reactor thermal hydraulics including advanced modelling.
• Simulation of LWR design basis accidents.
• Application of two-phase CFD to some reactor thermal hydraulic issues.
• Multiphase phenomena and modelling of severe accidents in LWRs.
• Hydrogen risk.