Description

Summary
Transmutex is seeking a skilled and highly motivated Thermal-Hydraulics engineer to drive the design development of our transmutation reactor. Join us if you have a passion for systems behavior and drive to advance cutting-edge nuclear designs.

About us
We are a Geneva-based start-up founded in 2019. We aim at reinventing nuclear energy by using an accelerator-driven system (ADS) to optimize the transmutation of long-lived nuclear waste. The innovative combination of particle accelerators and fuel, based on existing long-lived radioactive waste, will let us develop energy process that will be intrinsically safe, will reduce the stockpile of long-lived waste, is resistant to proliferation, and will be cost competitive.

Job description
We are seeking an adaptable and skilled thermal-hydraulics engineer, preferably with a nuclear engineering background to contribute to the design and development of thelead-cooled fast reactor. This role will involve performing system thermal-hydraulics analysis. The work will support design optimization and safety analysis of the subcritical reactor lead cooling system.

Key Responsibilities
Perform system thermal-hydraulic analyses for normal operations and accidental conditions in the frame of the reactor safety analysis
Perform core sub-channel analyses
Perform detailed computational fluid dynamics (CFD)analysis for key reactor components
Contribute and perform multi-physics calculations coupling neutronics, thermal-hydraulics and thermo-mechanical simulations
Develop, maintain, and validate the thermal-hydraulic methodologies and modelling codes
Collaborate with cross-functional teams for integrated reactor performance evaluations
Contribute to internal reports and documentation for licensing efforts

Ideal candidate profile:
Secondary university degree in Thermal Hydraulics Engineering, or a related field (Master’s or Ph.D. preferred)
3-5 years of experience in core and plant thermal-hydraulic analysis
Good foundation in benchmarked system codes such as RELAP5, TRACE.
Ability to work collaboratively in multicultural and multidisciplinary teams.
Willingness to continuously learn and adapt to project needs.
Proficiency in English

Additionally, it will be an advantage if you have:
Knowledge and understanding of RELAP5-based thermal-hydraulic code structure, numerical methods, and correlations as well as their applicability in lead-based reactors.
Prior experience with CFD using ANSYS-Fluent
Proficiency in Fortran and Python languages
Clear and demonstrated understanding of reactor systems and their technical specifications
Experienced with coupled multi-physics calculations
Proficiency in French, German or Italian