Senior Nuclear Thermal Hydraulics Consultant

Title:
Senior Nuclear Thermal Hydraulics Consultant

Title: Senior Nuclear Thermal Hydraulics Consultant

Salary range: £71,000 to £82,000 per annum depending on experience

Location: Bristol or Manchester

Working Pattern: We operate a flexible hybrid working pattern at Frazer-Nash, with time split between the office and working from home.

The Nuclear renaissance is here:

About Frazer‑Nash in Nuclear

Frazer‑Nash has over three decades of experience supporting the UK nuclear sector. Our multidisciplinary teams work across civil nuclear operations, new‑build programmes and decommissioning, helping our clients meet exacting technical and regulatory requirements.

Our thermal hydraulics specialists work closely with safety, systems, and reactor engineers, providing insight into complex plant behaviour and supporting clients through design, justification, and regulatory engagement. We empower our consultants to take ownership of their work, build deep technical expertise, and have visible impact.

Why Join Frazer‑Nash?

- Work on nationally significant nuclear programmes with real societal impact
- Take ownership of technically challenging work and client delivery
- Develop your career in a supportive, technically ambitious consultancy
- Be part of a collaborative team shaping the future of nuclear engineering in the UK

Why this role?:

As a Senior Nuclear Thermal Hydraulics Consultant, you will apply advanced analytical techniques and modelling tools to understand and explain complex thermal‑hydraulic behaviour in nuclear systems. You will contribute across the full consultancy lifecycle, from technical analysis and interpretation through to client engagement and business development.

Taking the lead

You will manage technical work packages, engage directly with clients, and support project delivery, while collaborating with supportive colleagues and mentoring and guiding less experienced engineers.

Variety of work

Our consultants typically work on multiple projects at once, ranging from short, focused studies to long‑term programme support across the nuclear lifecycle.

Growing capability

You will contribute to winning work, client discussions, and the continued growth of our thermal‑hydraulics capability across existing and emerging nuclear programmes.

Key responsibilities include:

- Developing and maintaining thermal‑hydraulic models of nuclear plant systems using industry‑standard codes,
- Analysing fault sequences, transients, and system behaviours to inform design decisions and nuclear safety cases,
- Providing authoritative interpretation of model results and underlying physical phenomena,
- Supporting model verification, validation, and best‑practice application,
- Communicating complex technical outputs clearly and concisely to clients, regulators, and internal stakeholders.

What we are looking for:

Technical experience:

- Strong understanding of fluid flow, heat transfer, thermal hydraulics, and multiphase flows,
- A degree in Engineering, Physics, Applied Mathematics, or a related discipline, or equivalent relevant experience,
- Demonstrable experience in nuclear thermal hydraulics supporting nuclear plant design and/or operations (perhaps using codes like RELAP, GOTHIC, CATHARE, TRACE, VIPRE, S5K)
- Experience of transient and fault analysis within nuclear safety contexts,
- Ability to interpret, validate, and clearly explain complex modelling outputs.

Personal and consultancy skills:

- Ability to independently manage and deliver work to meet client requirements
- Experience contributing to proposal writing, client liaison, and business development
- Strong communication skills, with the ability to engage effectively through meetings, presentations, written reports, commercial bids, and technical discussions

Due to the nature of the work that Frazer ‑ Nash Consultancy undertakes, candidates will be required to undergo pre ‑ employment screening and must be able to satisfy clearance criteria for UK National Security Vetting.

BENEFITS

We provide our people with an excellent benefit and offering package that comprises:

- Competitive salary with yearly reviews
- 25 days holiday + the opportunity to buy 5 days.
- A company that has its heart in the right place and a welcoming work culture.
- Happy to talk flexible working
- Enhanced parental benefits
- Company pension scheme
- Targeted professional development
- Life assurance
- Private healthcare membership
- Bonus scheme linked into company performance
- Paid membership fees to a professional institution
- Support in attaining professional membership
- Cycle to work scheme
- Season rail ticket loan
- And further optional benefits you can tailor to your personal requirements