Nuclear Thermal-Hydraulics Engineer

Eurelite (Beijing) Technology Co., Ltd; Paris; Sur place; EUR 70 000 - 110 000; Plein temps

Résumé du poste

EURELITE is developing next-generation Advanced Modular Reactor (AMR) technologies. We seek a Thermal-Hydraulics Engineer to contribute to design, analysis, and optimization of high-temperature helium-cooled reactor systems.

You will work on primary loop analysis, transient behavior, and safety-system evaluations to support era-defining nuclear energy solutions. The role involves collaboration with reactor physics, safety analysis, mechanical design, and suppliers.

Qualifications

• Master’s or PhD in Thermal Engineering or Nuclear Engineering.
• Strong background in heat transfer, thermodynamics, and fluid dynamics.
• Experience with thermal-hydraulic modeling and simulation.

Responsabilités

• Develop and maintain high-fidelity thermal-hydraulic models for reactor primary systems.
• Perform transient analyses for emergency cooling and decay heat removal.
• Define thermal-hydraulic requirements for IHX, helium circulators, and piping.
• Produce calculation reports, validation records, and engineering specs.
• Present results and defend methodologies in technical reviews.

Connaissances

Thermal engineering

Fluid mechanics

Heat transfer

CFD tools

Nuclear safety

Transient analysis

Formation

Master’s in Thermal Engineering

PhD in Nuclear Engineering

Energy & Power Engineering

Outils

ANSYS Fluent

OpenFOAM

STAR-CCM+

Description du poste

About EURELITE

EURELITE is developing next-generation Advanced Modular Reactor (AMR) technologies to support a cleaner, safer, and more resilient energy future.

Location & Working Arrangement

EURELITE is currently building its global engineering presence. The company’s Paris office is expected to open in 2027. Until then, international candidates joining for on-site positions will initially work as part of our Beijing-based China engineering teamduring the first year.

Position Overview

We are seeking a Thermal-Hydraulics Engineer (Nuclear Thermal-Hydraulics Engineer) to join our reactor development team and contribute to the thermal-hydraulic design, analysis, and optimization of advanced nuclear reactor systems.

This role provides an exciting opportunity to work at the forefront of Advanced Modular Reactor (AMR) technology, focusing on high-temperature helium-cooled primary loop design, coolant flow analysis, heat transfer modeling, transient simulation, and reactor safety system evaluation.

The successful candidate will apply expertise in thermal engineering, fluid mechanics, heat transfer, computational modeling, and nuclear reactor systems analysisto support the development of next-generation nuclear energy systems.

You will collaborate closely with reactor physics, safety analysis, mechanical design, fluid systems, equipment engineering, and structural integrity teamsto support integrated reactor design and engineering validation.

Key Responsibilities

Primary Loop Thermal-Hydraulic Analysis

• Develop and maintain high-fidelity thermal-hydraulic models for reactor primary systems.


• Analyze:
  
  
  
  • Coolant flow distribution
  
  
  • Temperature distribution
  
  
  • Pressure behavior
  
  
  • Heat transport performance
  
  
  • Steady-state and transient operating conditions
  
  
  
  


• Evaluate the thermal-hydraulic behavior of high-temperature helium coolant systems, including:
  
  
  
  • Heat transfer characteristics
  
  
  • Gas flow dynamics
  
  
  • Aerothermal performance
  
  
  • High-pressure operating behavior
  
  
  
  

Safety System & Transient Analysis

• Perform thermal-hydraulic transient analyses for:
  
  
  
  • Emergency cooling systems
  
  
  • Decay heat removal systems
  
  
  • Accident and off-normal operating scenarios
  
  
  
  


• Provide verified thermal-hydraulic boundary conditions and transient input parameters to safety analysis teams.


• Support evaluation of reactor safety margins and passive cooling performance.

Equipment Thermal Integration

• Define thermal-hydraulic requirements and interface parameters for critical reactor components, including:
  
  
  
  • Intermediate Heat Exchanger (IHX)
  
  
  • Helium circulators/blowers
  
  
  • Primary piping systems
  
  
  
  


• Support equipment design optimization and technical alignment with suppliers.


• Participate in engineering interface discussions and design reviews.

Modeling Validation & Engineering Documentation

• Develop:
  
  
  
  • Thermal-hydraulic calculation reports
  
  
  • Simulation models and documentation
  
  
  • Validation records
  
  
  • Engineering design specifications
  
  
  
  


• Present analytical results and defend modeling methodologies during formal technical reviews.


• Support verification and validation activities for reactor thermal-hydraulic systems.

Qualifications & Requirements

Education

• Master’s degree or Ph.D. in:
  
  
  
  • Thermal Engineering
  
  
  • Fluid Mechanics
  
  
  • Energy & Power Engineering
  
  
  • Nuclear Engineering
  
  
  • Related technical disciplines
  
  
  
  

Technical Skills

• Strong understanding of:
  
  
  
  • Heat transfer fundamentals
  
  
  • Thermodynamics
  
  
  • Fluid dynamics
  
  
  • Thermal-hydraulic system behavior
  
  
  
  


• Experience with:
  
  
  
  • Thermal-hydraulic modeling and simulation
  
  
  • Engineering calculation methods
  
  
  • Experimental thermal-fluid data analysis
  
  
  
  


• Knowledge of:
  
  
  
  • Nuclear reactor thermal-hydraulics
  
  
  • Primary loop systems
  
  
  • Coolant system design
  
  
  • Transient analysis methods
  
  
  
  


• Experience with engineering simulation tools is highly desirable.

Professional Competencies

• Strong analytical capability and rigorous engineering problem-solving skills.


• Ability to analyze complex thermal-fluid systems and develop engineering solutions.


• Strong collaboration skills across multi-disciplinary technical teams.


• Good technical communication, engineering documentation, and design review capabilities.

Preferred Qualifications

Candidates with the following experience will be highly valued:

• Hands-on experience with Computational Fluid Dynamics (CFD) software, including:
  
  
  
  • ANSYS Fluent
  
  
  • OpenFOAM
  
  
  • STAR-CCM+
  
  
  • Equivalent CFD tools
  
  
  
  


• Experience in:
  
  
  
  • High-temperature gas dynamics
  
  
  • Helium coolant systems
  
  
  • Thermal-fluid experimental loops
  
  
  • Fluid-structure interaction (FSI)
  
  
  
  


• Experience in Advanced Modular Reactor (AMR), Small Modular Reactor (SMR), or Generation IV reactor technologies.


• Experience with:
  
  
  
  • Thermal-hydraulic test loop design
  
  
  • Reactor system simulation
  
  
  • Multiphysics modeling
  
  
  • Computational engineering methods
  
  
  
  

Why Join EURELITE?

At EURELITE, you will have the opportunity to:

• Work on cutting-edge Generation IV Advanced Modular Reactor technology


• Contribute directly to the future of clean and reliable energy


• Collaborate with international nuclear experts and engineering teams


• Apply advanced simulation and AI-driven approaches to nuclear innovation


• Grow with a pioneering technology company shaping the next generation of energy systems