Our involvement in industry and nuclear research

G-MET Technologies is a consulting firm strongly involved in nuclear research since its creation. Our team of engineers is trained and aware of the constraints and criteria imposed by nuclear safety. Our involvement, both on nuclear fission projects (RJH experimental reactor, ASTRID research reactor) and fusion (ITER reactor), ensures us to use the latest methodologies in numerical simulation.

Our skills

In the field of numerical simulation for nuclear, G-MET Technologies proposes to carry out CFD, solid mechanics as well as nuclear safety studies.

Structural mechanics

  • Mechanical dimensioning (RCCM, CODAP)
  • Sismic dimensioning
  • Buckling and fatigue

Computational Fluid Dynamics (CFD)

  • Turbulent flows analysis
  • Experimental device cooling
  • Process optimization etc..

Thermalhydraulics of Nuclear Reactor (CATHARE 2)

  • Data set writing – cooling network analysis
  • Nominal or incidental operation
  • Severe accident

Examples studies involving industry and nuclear research

Polyhedral mesh and streamline (FLUENT)

Calculation of heat transfert coefficients and pressure drops for the sodium-gas exchanger of ASTRID reactor (Advanced Sodium Technological Reactor for Industrial Demonstration)

  • Sensitivity analysis (hundred calculations).
  • Validation of the calculation: mesh sensitivity, wall treatment. Benchmark between FLUENT and Analytical/Experimental Correlations.
  • Calculations carried out using ANSYS FLUENT.

Seismic dimensioning of an experimental nuclear reactor (RJH) irradiation device

  • Calculation of eigenfrequencies.
  • Seismic dimensioning of structures and assemblies.
  • Pseudo-static method.
  • Calculations carried out using ANSYS under Workbench environment.

LOCA transient analysis – MADISON irradiation device of Jules Horowitz Reactor

  • Writing of data set and CATHARE2 modeling of the cooling loop (exchangers, piping, valves, nuclear fuel ..).
  • Definition of appropriate calculation methodologies. Choice of calculation hypotheses and conservatism analysis.
  • Physical analysis of the LOCA transient behavior. Calculations of sensitivity on several input parameters.
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