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Home   /   E&T program   /   Continuous Professional Development   /   Thermal hydraulics and safety - International school in nuclear engineering

Thermal hydraulics and safety - International school in nuclear engineering

1.1.1 Réacteurs nucléaires

Nuclear safety

Pressurized water reactors (PWR)

Thermal hydraulics

Computation codes

Modelisation

4.5
Recommandation: 97 %
Average participant satisfaction score
Percentage of recommendations
CATHARE view of the SOFIA simulator in the context of a LB-LOCA

In summary

The ISNE international training course aims at promoting knowledge in the field of nuclear sciences. This module breaks down into two distinct parts: the "Thermal hydraulics of light water reactors (LWR)",
and "Modelling and multi-phase phenomenology of severe accidents in LWRs ".

Who should take this course ?

The doctoral course is designed for young researchers, PhD students, post-doctorates and engineers from nuclear industry companies, research centres, Universities, Technical Safety Organizations (TSO), regulatory bodies.

Learning outcomes

  • 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 hydraulics 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.
  • International School 2026 leaflet
  • Technical visit organized (if possible, depending on the availability of the experimental facilities)
  • On-field experience, case study and tutorials
  • Lectures taught by international experts including:
    Dominique BESTION ("Director of Research at the CEA, has developed two-phase flow models for the CATHARE system code for 35 years"),
    Etienne STUDER ("International Expert at the CEA in fluid mechanics and hydrogen risk issues")
    and Florian FICHOT ("International Expert on severe accidents in nuclear reactors at ASNR, who has been working for 25 years in the field of physical modelling of severe accidents in nuclear reactors").
- Basic phenomena in single- and two-phase flow.
- Thermal hydraulics 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 hydraulics issues.
- Multiphase phenomena and modelling of severe accidents in LWRs.
- Hydrogen risk.

Master of Science (or equivalent diploma) in Thermal hydraulics, Thermal Engineering or Fluid Mechanics.
Or, Master of Science in Nuclear Engineering with knowledge in thermal hydraulics.

Teaching method and tools

On-site visit

Collaboration

  • Logo CEA original

Contact(s)

INSTN Saclay

Course organiser :

Irfana GUELAH
instn-ues-sac-af@cea.fr

Program contact :

Poya SHIROWJAN
poya.shirowjan@cea.fr
+33 1 69 08 32 91

training sessions

Group limited to 24 trainees$
*Maybe exceeded in case of high registration demand

If you are disabled, please contact the disability correspondent at the following address: instn-handicap@cea.fr

No training session is scheduled for the moment, if this training interests you, please contact us.

From 2026 february 02
To 2026 february 06 INSTN Saclay 2,680.00€ excl. taxes REGISTER

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