Senior Thermofluids Modelling Engineer (Reactor Faults) at Rolls - Royce SMR

Warrington, England, United Kingdom -

Full Time

Start Date

Immediate

Expiry Date

05 Jun, 26

Salary

66500.0

Posted On

07 Mar, 26

Experience

5 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

Fluid Dynamics, Thermal Processes, Reactor Systems Modelling, Safety Case Development, Python, Linux, High-Performance Computing, Verification and Validation, Uncertainty Quantification, Quality Management, Nuclear Thermal Hydraulics, Analysis Reporting, Benchmarking, Team Leadership, Communication, Design Optimisation

Industry

Utilities

Description

Role Title: Senior Thermofluids Modelling Engineer (Reactor Faults) We are Rolls-Royce SMR and we’re doing something that’s never been done before. We’re revolutionising an industry. That’s a once-in-a-career opportunity for those excited by such a challenge. This is more than just a job; this is a legacy. We are now recruiting for a Senior Thermofluids Modelling Engineer to join our Performance & Analysis team, the centre of excellence for engineering analysis used to substantiate the performance and safety of the SMR power station. About the Role: As a senior performance analyst, you will technically lead a small team to model fluid and thermal systems that extract power from the nuclear core and ensure safe operation of the reactor. This will involve producing models and analyses that demonstrate reactor operation and working closely with system designers to optimise the design of the plant and its safety systems to maximise safety, performance, and value for money. Analysis outputs form a key input to the safety case and support the overall substantiation of the power station design. Performance analysts have a key role in supporting the development of and authoring analysis sections of the safety case. The team uses a wide variety of tools and software to analyse key scenarios for the plant, including: Normal operations, when the reactor must produce power and respond to changes in demand from the grid Operating transients such as shutting down the reactor and then restarting it for refuelling Reactor faults, where passive safety systems are key to protecting the core and ensuring the integrity of the containment Due to the safety-critical nature of the modelling we undertake, excellent quality-management processes and code verification, validation and uncertainty quantification are essential. The development of robust and automated analysis routes around the analysis codes, primarily developed using Python on our Linux-based high-performance computing resources, is an important aspect of this. The performance team collaborates closely with our in-house test capability team, who are building large-scale multi-megawatt test rigs to represent key aspects of the plant to support the validation of the performance analysis tools. There are opportunities within the team to work on benchmarking of our codes against test data and support the development of the test rig designs and associated test campaigns. As performance analysis supports the development and substantiation of many aspects of the power station design, effective communication and collaboration with teams across a wide range of engineering and non-engineering disciplines is essential. Senior performance engineers will additionally be expected to apply technical expertise to support the development of capability and staff across the technical function and technically lead small teams and interfaces with other areas of the business. As we strive to find the best fit for this position, we are seeking individuals with a minimum level of experience, training, and qualification. But we'll let you in on a secret: there's no such thing as the ‘perfect’ candidate. If you feel you meet 75% of the requirements for this role, we would love to hear from you. We’ll Need You To: Lead a small team to model reactor systems and produce analyses that demonstrate safe and efficient operation Work closely with system designers to optimise plant design and safety systems Support development and authoring of safety case documentation Collaborate across teams to define analysis requirements and communicate results Key Skills Required: Strong understanding of fluid dynamics and thermal processes, with experience applying structured, methodical analysis approaches Hands-on experience using industry-standard fluids and thermal analysis software; familiarity with nuclear thermal hydraulics tools (RELAP, FLOMASTER, VIPRE, CTF, GOTHIC desirable) Proven ability to develop analysis methods, models, and tools, including Python-based solutions, to support design and safety case development Skilled in writing clear, structured analysis reports and contributing to safety case documentation Experience in verification and validation of analysis models, including benchmarking, uncertainty quantification, and adherence to software QA processes Knowledge of safety-critical plant systems in industries such as nuclear, oil & gas, or aerospace; nuclear-specific knowledge desirable but not essential Track record of delivering analysis tasks to time, cost, and quality, with strong communication and leadership skills Degree-qualified in Engineering, Physics, Mathematics, or Computer Science; Chartered Engineer (or equivalent) preferred Location: Hybrid working with one of the following locations as your primary site: Derby, Manchester or Warrington Salary and Package: The salary band for this will be between £50,650–£66,500 dependent on the skills, values, and knowledge you bring. There may be some flexibility with the starting salary in exceptional cases, and, in due course, there is the potential for you to develop the role further. Benefits include: Bonus - Performance-related target opportunity 12.5% Benefits Allowance - £2,200 per annum for a bespoke package Pension - 12% employer and 6% employee contributions Holidays - 28 days (+ public holidays) with ability to buy or sell up to 4 days Private Medical Insurance - BUPA single cover Life Assurance - 6x pensionable pay Home Office Support - £250 one-off payment for new starters You’ll be joining a forward-thinking organisation that values transparency, fairness, and innovation. We offer a flexible, inclusive, and supportive working environment, opportunities for career growth in a rapidly scaling business, and a culture that values diversity, innovation, and continuous learning. Selection Process: The closing date for this role is 30th March 2026. #LI-CE1 #LI-Hybrid #WeareSMR #destinationnuclear Why Join Us? You’ll be joining a forward-thinking organisation that values transparency, fairness, and innovation. We offer: • A flexible, inclusive, and supportive working environment. • Opportunities for career growth in a rapidly scaling business. • A culture that values diversity, innovation, and continuous learning. We are an equal opportunities employer and welcome applications from all backgrounds. Inclusivity is important to us, and as a Disability Confident organisation, we are committed to fair, supportive, and continually improving recruitment practices that ensure everyone has the opportunity to thrive. Confidence can sometimes hold us back from applying for a job. But we'll let you in on a secret: there's no such thing as a 'perfect' candidate. If you feel you meet 75% of the requirements for this role, we would love to hear from you. Also, if you are considering a career move or a sector-jump, please get in touch – we welcome applications from people with transferable skills. Our Application Process Due to the safety regulations within the nuclear industry, applicants will be required to participate in additional screening. These are: • Obtaining Baseline Personnel Security Standard (BPSS) clearance • Satisfactory completion of a Disclosure and Barring Service (DBS) check • Satisfactory completion of a basic financial probity check We are Rolls-Royce SMR A career with Rolls-Royce SMR offers a unique opportunity to contribute to an exciting organisation delivering a transformational mission. Rolls-Royce SMR is a radically different approach to proven nuclear technology. Each Rolls-Royce SMR power station will generate 470MW of low-carbon energy - equivalent to more than 150 onshore wind turbines and enough to power a million homes for over 60 years. With its Rolls-Royce SMRs will play a vital role in supporting renewable energy by helping to overcome intermittency and ensure a stable, sustainable energy future. We’re proud to be one of the few employers that can genuinely say we’re a strengths-based organisation. Our people are here because of what makes them exceptional - and our role is to help them make the most meaningful contribution of their careers, doing work they love. We offer opportunities that go beyond traditional career paths. At Rolls-Royce SMR you can develop your career by exploring roles and challenges that align with your unique talents. Our culture At Rolls-Royce SMR, we are committed to ensuring that our teams reflect the communities we serve and that everyone can be themselves at work. We know that diverse teams are more innovative and get better results, and that our people can thrive and be more successful in truly inclusive cultures. Join us and help shape our culture. Find out more about our inclusion pledge. Rolls-Royce SMR is a place where everyone can grow, so whatever background you bring with you, please apply if this is a role that would make you excited to come into work every day and help shape our culture. Why join us? You’ll be joining a forward-thinking organisation that values transparency, fairness, and innovation. We offer: • A flexible, inclusive, and supportive working environment. • Opportunities for career growth in a rapidly scaling business. • A culture that values diversity, innovation, and continuous learning. We are an equal opportunities employer and welcome applications from all backgrounds. Inclusivity is important to us, and as a Disability Confident organisation, we are committed to fair, supportive, and continually improving recruitment practices that ensure everyone can thrive. What we offer At Rolls-Royce SMR, our reward offering is focused on recognising you for your efforts and motivate you to continue achieving. Our rewards and benefits scheme are designed for employees to have complete control. By providing complete autonomy, you can focus on what’s important to you. Whether it’s investments, insurances or wellbeing, it’s in your hands. Work is an activity, not a place. We understand due to commitments and lifestyle; the world of work has evolved beyond the 9 - 5. Whether its varied hours or hybrid working, our flexible working arrangements make it possible for employees to achieve a true work life balance. Your career journey At Rolls-Royce SMR, we don’t just want you to contribute, we want you to grow. We have open dialogue with our employees to understand the ambitions for their career and set plans to achieve them. Whether it’s helping you obtain formal qualifications or pairing you with a mentor, Rolls-Royce SMR will provide you with a fulfilling career. Our Team | Rolls-Royce SMR Join our talent community We're always on the lookout for the best talent. 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Responsibilities

The Senior Thermofluids Modelling Engineer will technically lead a small team to model fluid and thermal systems essential for extracting power from the nuclear core and ensuring safe reactor operation. This involves producing models and analyses that support the safety case and collaborating with system designers to optimize plant design for safety and performance.