Thermal Hydraulics Engineer

ATTB - The Big Jobsite; London; Hybrid; GBP 40,000 - 70,000; Full time

Job summary

A leading company in the nuclear power sector is seeking a Thermal Hydraulics Engineer to contribute to modelling development and performance analysis. This permanent role offers the opportunity to work on exciting projects in a hybrid environment, requiring strong expertise in heat transfer, fluid mechanics, and nuclear safety.

Qualifications

• Proven background in heat transfer and thermal hydraulics.
• Experience in modelling and analysing thermal hydraulic systems.
• Strong knowledge of nuclear technology and safety.

Responsibilities

• Provide analysis for design and safety case justification.
• Lead designs of thermal management systems.
• Model and analyse thermal hydraulic systems for nuclear applications.

Skills

Heat Transfer

Fluid Mechanics

Nuclear Technology

Nuclear Safety

Analytical Skills

Problem Solving

Education

BSc or MSc in Engineering

Tools

RELAP5

MATLAB

ANSYS

OpenFOAM

Job description

Position: Thermal Hydraulics Engineer (Nuclear)

Location: Southwest (although UK wide locations available) – Hybrid

Sector: Nuclear

Type: Permanent

DESCRIPTION

Our Client is a global leader in the nuclear power sector.

THE ROLE:

The Thermal Hydraulics Engineer will contribute to modelling development, performance analysis, and conceptualisation expertise in our Client’s portfolio of nuclear engineering and fuel manufacturing projects. They should have proven experience and knowledge in Heat Transfer, Fluid Mechanics, Nuclear Technology, and Nuclear Safety. The role involves joining a busy department on a permanent basis during a period of exciting growth.

RESPONSIBILITIES

1. Provide analysis to support preliminary concept assessment, design, safety case justification, and manufacturing support.
2. Lead designs of thermal management systems and develop thermal modelling and calibration methodologies.
3. Model and analyse thermal hydraulic systems for nuclear and fuel systems (cooling systems, reactors, heat transfer, heat exchangers, etc.).
4. Perform code validation and benchmarking studies.
5. Execute technical studies and report on schedules while collaborating with scientific, engineering, and safety departments.
6. Support design activities via thermal hydraulic simulations in collaboration with Mechanical Design, Codes and Methods, and Safety/Licensing teams.
7. Use thermal hydraulic computer and simulation codes (e.g., RELAP5, CFD, severe accident codes) for design and safety assessments.
8. Support safety justification through analysis and quality assurance.
9. Act as the primary contact for validation cases of analytical methods.
10. Create and deliver regulator presentations and technical reviews to senior management.
11. Perform technical risk assessments and manage requirements for fluid and thermal systems.
12. Draft and review project deliverables such as calculation notes, design specifications, and technical reports.

REQUIREMENTS

1. Proven background in heat transfer, fluid mechanics, and thermal hydraulics.
2. Experience in conceptualising, modelling, and analysing thermal hydraulic systems.
3. Proficiency in engineering analysis including thermal, fluid, stress, manufacturability, and cost analysis.
4. Strong knowledge of nuclear technology and safety.
5. Proficiency in thermal hydraulic codes and tools (RELAP5, ATHLET, Thermal FEA).
6. Knowledge of simulation and engineering tools and CFD codes (MATLAB, MELCOR, SPECTRA, ANSYS, CAD, OpenFOAM).
7. Proficiency in steady-state and transient modelling of cooling systems.
8. Strong technical, commercial, and project management skills.
9. BSc or MSc in Engineering or equivalent.
10. Ability to collaborate across departments to define design requirements.
11. Ability to provide technical feedback to design and manufacturing teams.
12. Analytical and logical mindset with the ability to handle multiple studies.
13. Excellent attention to detail and problem-solving skills.

Note: If you do not hear from us within 2 weeks of your application, please consider yourself unsuccessful at this time.