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Nuclear Thermal Hydraulics Analytical Engineering Opportunities

Full Time

Derby - Hybrid

Why Rolls-Royce?

A range of exciting thermal hydraulics opportunities are available within Analytical Engineering at Rolls-Royce Submarines, for engineers at all stages of their career.

Our submarines business is responsible for the design, manufacture, supply and through-life support of nuclear propulsion plants to provide pioneering power to the Royal Navy's submarine fleet. You can find out more about the amazing projects that we are working on here:

Join us and we’ll provide an environment where you can be yourself. An inclusive, digital-first culture that invests in you, gives you a platform for continuous learning, and access to an incredible breadth and depth of opportunities to grow your career

Rolls-Royce Submarines are the UK thought leader for nuclear thermal hydraulics; we employ cutting edge analytical methods today, are championing the development of next generation methods for the future with academia, and have unique experimental testing capabilities. Thermal hydraulics is a pivotal part of the design and safety of each of our nuclear propulsion plants, and is central to the success of many other functions and disciplines.

The core thermal hydraulics team works to assess the performance and safety of the reactor core, by ensuring adequate heat transfer throughout its operational life; here analysis is undertaken to develop and optimise core designs, substantiate their thermal performance, and to support manufacturing campaigns. Teams within plant performance undertake a wide range of thermal hydraulic analyses ranging from detailed predictions of heat transfer in individual components using 3D computational fluid dynamics so that their operational life can be accurately assessed, to 1D systems code models of an entire plant to predict overall performance and ensure its safe operation. This gives rise to a wide range of exciting and interesting workstreams involving fluid dynamics and heat transfer with important real world applications.

We offer excellent development, a competitive salary and exceptional benefits. These include bonus, employee support assistance and employee discounts.

Your needs are as unique as you are. We encourage flexible working arrangements and support hybrid working wherever possible, so you can always be at your best - wherever and whenever you work.

What you will be doing:

A diverse range of analytical methods are employed to understand and assess both core and plant thermal hydraulics. This includes hand calculations, 1D systems code models of entire plants, simplified multi-phase CFD models of core components, and detailed 3D CFD models of individual components.

Successful candidates will be involved in all aspects of thermal hydraulic analyses of our products, with opportunities to rotate through the wide variety of our different methods and their applications:

Who we are looking for:

At Rolls-Royce we embrace agility, are bold, pursue collaboration and seek simplicity in everything we do. These principles form our values and behaviours and are an essential component of our assessment process and are fundamental qualities that we seek for all roles.

Join us & Power our future

Pioneers of Power

We’re an equal opportunities employer. We’re committed to developing a diverse workforce and an inclusive working environment. We believe that people from different backgrounds and cultures give us different perspectives. And the more perspectives we have, the more successful we’ll be. By building a culture of respect and appreciation, we give everyone who works here the opportunity to realise their full potential.

We welcome applications from people with a refugee background.

You can learn more about our global inclusion strategy at

To work for the Rolls-Royce Submarines Business an individual has to hold a Security Check (SC) clearance without any caveats to that clearance. Rolls-Royce will support the application for Security Clearance if the individual does not currently already have this in place.

Due to the nature of work the Business conducts and the protection of certain assets a person has to be a UK national or in MoD approved cases a Dual National from a non ITAR country.

Closing date: 26th January 2023

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