Nuclear Multiphysics Simulation Engineer - AMR

About EURELITE

EURELITE is an innovative nuclear technology company developing Generation IV Advanced Modular Reactor (AMR) systems to support the global transition toward clean, reliable, and sustainable energy.

Our mission is to accelerate the future of nuclear energy through advanced reactor technologies, combining cutting-edge engineering, digital innovation, and world-class nuclear expertise.

We are seeking a Multiphysics Simulation Engineer to join our Safety & Licensing Engineering team and contribute to the development of advanced simulation frameworks, digital validation methodologies, and high-fidelity reactor modeling solutions for next-generation AMR systems.

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 team during the first year.

Position Overview

As a Multiphysics Simulation Engineer, you will develop, execute, and automate high-fidelity coupled simulation frameworks to support reactor design optimization, safety analysis, and engineering validation.

This role operates at the intersection of reactor physics, thermal-hydraulics, computational mechanics, and advanced numerical simulation, enabling virtual testing and performance prediction of complex reactor behaviors before physical prototyping.

You will contribute to the development of a modern digital engineering and simulation platform, integrating advanced computational methods, high-performance computing (HPC), and automated simulation workflows for next-generation nuclear systems.

Key Responsibilities

Multiphysics Coupling & Reactor Simulation

• Establish and maintain advanced multiphysics simulation workflows integrating:
• Neutronics
• Thermal-Hydraulics / Computational Fluid Dynamics (CFD)
• Structural Mechanics
• Radiation and Source Term Transport
• Develop and execute high-fidelity coupled simulations, including:
• Neutronics–thermal-hydraulics coupling
• Neutronics–thermal–structural interaction
• Full-core transient behavior analysis
• Steady-state performance evaluation
• Support reactor design optimization through advanced simulation and engineering analysis.

Automated Simulation Pipeline Development

• Develop automated engineering simulation workflows using:
• Parametric geometry models
• Script-based automation
• Programmatic simulation pipelines
• Improve simulation efficiency through:
• Workflow automation
• Reduced manual processing
• Computational optimization
• Develop reusable simulation tools and engineering analysis frameworks.

High-Performance Computing (HPC) & Computational Engineering

• Manage and optimize HPC-based simulation workflows.
• Configure and execute:
• Parallel computing tasks
• Large-scale simulation cases
• Batch processing workflows
• Support computational resource planning, including:
• HPC infrastructure requirements
• Software dependencies
• Simulation performance optimization

Verification, Validation & Engineering Documentation

• Develop and maintain:
• Verification & Validation (V&V) methodologies
• Simulation qualification procedures
• Code validation test cases
• Prepare technical documentation supporting:
• Nuclear safety analysis
• Licensing activities
• Engineering design reviews
• Establish simulation credibility through systematic verification and validation processes.

Material Models & Reactor Design Support

• Develop and maintain:
• High-temperature reactor material models
• Environmental boundary condition databases
• Simulation input libraries
• Provide simulation results, analytical insights, and technical recommendations to:
• Chief System Engineer
• Reactor physics teams
• Thermal-hydraulics teams
• Safety analysis teams

Qualifications & Requirements

Education

Ph.D. preferred in:

• Nuclear Engineering
• Thermal Engineering
• Fluid Mechanics
• Computational Mechanics
• Applied Mathematics
• Computational Physics
• Related technical disciplines

Technical Skills

Strong expertise in at least two of the following simulation domains:

Neutronics Simulation

Experience with:

• OpenMC
• MCNP
• Reactor physics simulation methods
• Nuclear fuel burnup calculations

CFD / Thermal-Hydraulics Simulation

Experience with:

• OpenFOAM
• ANSYS Fluent
• Computational fluid dynamics
• Advanced heat transfer analysis

Structural Mechanics Simulation

Experience with:

• Abaqus
• CalculiX
• Computational mechanics
• Structural integrity analysis

Computational Skills

• Strong proficiency in:
• Linux environments
• High-performance computing (HPC)
• Parallel computing workflows
• Simulation automation
• Programming experience with:
• Python
• Bash scripting
• Scientific computing toolkits
• Experience with:
• Mesh generation techniques
• Numerical modeling methods
• Computational workflow automation

Professional Competencies

• Strong analytical and numerical problem-solving capabilities.
• Ability to work across multiple engineering disciplines.
• Ability to translate complex simulation results into engineering recommendations.
• Strong technical documentation and communication skills.

Preferred Qualifications

Candidates with the following experience will be highly valued:

• Direct experience with high-fidelity multiphysics coupling, including:
• OpenFOAM + MCNP coupling workflows
• Neutronics–thermal-hydraulic simulation
• Reactor digital twin development
• Experience with:
• HPC cluster environments
• Slurm workload management
• Large-scale scientific computing
• Knowledge of:
• Severe accident analysis
• Source term calculations
• MELCOR or similar safety analysis tools
• Experience in:
• Advanced reactor technologies
• Generation IV nuclear systems
• Nuclear safety analysis

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

Apply Now

If you are passionate about radiation protection, nuclear safety, and advanced reactor technology, we welcome your application.