Development of Machine Learning Models for Critical Heat Flux predictions H/F

Description du poste

Position description

Category

Thermohydraulics and fluid mechanics

Contract

Internship

Job title

Development of Machine Learning Models for Critical Heat Flux predictions H/F

Subject

Development of Machine Learning Models for Critical Heat Flux predictions

Contract duration (months)

6

Job description

The Critical Heat Flux (CHF) is a physical phenomenon that may cause the deterioration of the heat transfer in the core of nuclear reactors, potentially leading to core damage. Its accurate prediction is therefore a crucial issue in nuclear reactor safety. The internship deals with the prediction of the CHF through the development of machine learning techniques and the quantification of the associated uncertainty. It will be realized in the framework of an international OECD/NEA project on the development and application of artificial intelligence methodologies for nuclear engineering. Within this framework, the intern will:

• Perform a preliminary literature review on the topic and get familiar with the previous works performed at CEA, based on experimental data in tubes with uniform axial heat flux profiles

• Analyse the new experimental CHF database (e.g., tube with non-uniform heat flux, rod-bundle, rectangular channel, …) to understand the physical phenomenon and to verify the coherence and exploitability of the experimental data.

• Perform an initial assessment of previously developed machine learning models to the new database.

• Develop transfer learning to predict as accurately as possible the CHF for the new experiments.

• If time allows it, investigate the explainability issue and quantify the uncertainty of the models developed during the internship applying different state-of-the-art methodologies such as conformal prediction, hierarchical models and other coverage-driven techniques.

• Present and discuss the work during technical meetings and write a final report

Annonce publiée sur Indeed et reprise par Intelligence Academy. Seule l'annonce d'origine fait foi ; nous ne sommes pas l'employeur.