Thermal-Hydraulics Engineer

ph3Your mission /h3 /brpYou will work at the heart of our reactor development, using modelling, simulation and experiments to understand how our systems behave and to guide the engineering choices we make. Your work will cover a broad range of questions, from the behaviour of individual components to the interaction of thermal-hydraulics with the wider reactor system. /p /brpYou will work closely with colleagues in system engineering, nuclear safety, neutronics, chemistry, mechanics and other areas of expertise. Together, you will translate complex physical behaviour into practical design decisions. /p /brpYour expertise will matter not only because of the analyses you perform, but because of the judgement you bring to the project. We are looking for someone who knows when a question requires sophisticated modelling, when a pragmatic engineering approach is sufficient, and when an assumption needs to be challenged. /p /brpYou will also help us close the loop between simulation and reality. You will contribute to defining experiments, tests and prototypes that allow us to validate our models, challenge our assumptions and demonstrate that our innovations work outside the computer. /p /brpDepending on the stage of the technology, your work may support our non-nuclear Pilot, the Pioneer nuclear demonstrator or the future FOAK and NOAK reactor designs. /p /brpThis is an opportunity to have a real impact on the development of a novel nuclear technology while helping build the thermal-hydraulics capability of a growing deep-tech company. /p /brpThis role is based in Amsterdam, Netherlands or Lyon, France. /p /brh3In this role you will: /h3 /brul /brliOwn and deliver thermal-hydraulics analyses that support important reactor and system design decisions. /li /brliTranslate engineering questions and system requirements into appropriate thermal-hydraulic models, simulations and analyses. /li /brliSelect the right modelling approach and computational tool for each problem, balancing accuracy, complexity, available data and project needs. /li /brliPerform high-quality CFD and system-level thermal-hydraulic studies and critically assess the results. /li /brliAnalyse thermal-hydraulic behaviour across different levels of the reactor design, from components and systems to integrated reactor behaviour. /li /brliInvestigate relevant reactor transients and the interaction between thermal-hydraulics and other physical phenomena, including neutronics. /li /brliWork with system engineers to assess and improve the design of thermal-hydraulic systems and components, including heat exchangers, pumps and related equipment. /li /brliDevelop and improve modelling methodologies and tools that strengthen Thorizon's engineering capabilities, building computational workflows involving data preparation, simulation, post-processing and, where appropriate, coupling between different tools and physical models. /li /brliContribute to the verification and validation of computational tools and models used to support design and safety decisions following high standards like ASNR guide 28 and the execution of the thermal-hydraulic validation programme, including work performed with external research and engineering partners. /li /brliHelp identify where experiments, tests or prototypes are needed to increase confidence in the technology. /li /brliReview technical work produced internally and externally and challenge assumptions, methods and conclusions where appropriate. Support the technical specification and management of external specialists, engineering contractors and suppliers. /li /brliProvide technical guidance to colleagues and share your knowledge and good practices with the wider engineering team. /li /brliParticipate in technical exchanges with regulators and external experts when thermal-hydraulics is relevant to the project. /li /brliContribute to international initiatives and technical networks in thermal-hydraulics and advanced nuclear technology, including relevant IAEA and Euratom activities. /li /brliKeep up with developments in modelling techniques, computational tools, experimental methods and thermal-hydraulics applied to advanced nuclear systems. /li /brliWork across different project teams and contribute to building a strong and collaborative thermal-hydraulics capability at Thorizon. /li /br /ul /brh3About you: /h3 /brul /brliMaster’s degree in nuclear engineering, mechanical engineering, fluid mechanics, heat transfer, applied mathematics, or a related technical discipline. /li /brliPhD in nuclear engineering, fluid mechanics, heat transfer, numerical methods, or a related field is an advantage. /li /brliAround 8 years or more of relevant professional experience in thermal-hydraulics, CFD, reactor engineering, or a closely related field. /li /brliStrong hands-on experience with CFD methods, including RANS, LES and/or DES. /li /brliProfessional experience with CFD tools such as OpenFOAM, STAR-CCM+ or Fluent. /li /brliExperience with thermal-hydraulic system codes such as SPECTRA, CATHARE, TRACE or ATHLET. /li /brliStrong command of numerical methods and modelling approaches, with the ability to select an appropriate level of modelling for the engineering question at hand. /li /brliExperience designing, developing or using complex computational workflows, including multiscale and/or multiphysics approaches. /li /brliProgramming skills enabling the automation of engineering tasks, data preparation and processing, results post-processing, and integration of different computational tools. /li /brliSound understanding of the thermal-hydraulic challenges associated with molten salt reactor technology, or a strong interest in developing expertise in this area. /li /brliSolid knowledge of nuclear reactor thermal-hydraulics, including key reactor transients and the interaction between thermal-hydraulics and neutronics. /li /brliExperience in the analysis or design of thermal-hydraulic systems and components, such as heat exchangers, pumps or similar equipment. /li /brliFamiliarity with verification and validation methodologies for scientific and engineering computational tools. Knowledge of relevant IAEA, NRC, ASNR or other national/international practices is an advantage. /li /brliExperience in systems engineering, requirements management or safety-related engineering is an advantage. /li /br /ul /brpBut technical expertise is only part of what we are looking for. /p /brul /brlibTake ownership. /b See what needs to be done and make it happen. Use your judgement and don’t wait for perfect instructions. /li /brlibWork as one team. /b Seek input from other disciplines and recognise that good solutions rarely come from one perspective. /li /brlibSpeak up. /b Challenge assumptions, raise risks and be clear about what is known, assumed or still needs to be proven. /li /brlibLearn and adapt. /b Stand by your position, but change it when the facts change. When things go wrong, learn from them rather than look for someone to blame. /li /brlibKeep things moving. /b Bring structure to complexity, focus on what matters and keep solutions as simple as possible without compromising quality. /li /brlibBuild trust and raise the bar. /b Be open, direct and reliable. Care about your work and help others do their best. /li /brlibEnjoy the challenge. /b The problems are difficult and the path is not always predictable. You find that energising. /li /br /ul /brpWe value people who combine high standards with low ego: people who want to make an impact, challenge each other constructively and understand that ultimately, we are all working towards the same goal. /p /brpYou communicate fluently in English, both written and spoken. /p /brpFrench or Dutch is an advantage. /p /brh3What you can expect from us: /h3 /brul /brliThe opportunity to help realize the most promising reactor technology and advance Europe's energy future /li /brliBeing part of an exceptional team that combines engineering rigor, scientific excellence, and entrepreneurial drive /li /brliWorking in multidisciplinary teams on ambitious missions, with responsibility and meaningful impact from day one /li /brliA fast-moving deep-tech environment where initiative is valued and people are trusted to make decisions /li /brliComplex, multidisciplinary challenges that will stretch you and accelerate your growth /li /brliCompetitive compensation and participation in our employee profit-sharing plan /li /brliAn international workplace with offices in the heart of Amsterdam and Lyon /li /br /ul /p #J-18808-Ljbffr