Role Title: Senior Engineer – Severe Accident Analysis
About the Role
The Performance & Analysis team is the centre of excellence for engineering analysis used to substantiate the performance and safety of the SMR power station. As a Senior Engineer – Severe Accident Analysis you will perform detailed technical assessments of severe accident scenarios impacting the reactor core, reactor coolant system and containment. These scenarios may include loss‑of‑coolant events, intact‑circuit faults, bypass and secondary faults, and shutdown conditions leading to core degradation. You will address complex thermal‑hydraulic phenomena, including core material degradation, generation of combustible gases, release and transport of steam and hydrogen, and conditions that could challenge containment and safety systems. Your analyses will inform safety‑system design decisions and demonstrate robust safety margins within the SMR safety case.
You will take responsibility for progressing analysis tasks in line with programme milestones, applying the RR‑SMR gated review process and ensuring all deliverables meet required quality and governance standards. You will collaborate with a wide range of technical and non‑technical stakeholders and support the continued development of severe‑accident analysis capability within the team.
Key Responsibilities
* Deliver severe accident analysis for Design Extension Conditions across the SMR plant
* Apply thermal‑hydraulic knowledge and numerical methods to evaluate accident progression
* Perform severe‑accident modelling using recognised tools such as MAAP
* Plan and manage analysis work packages, including scope, schedule and risk
* Interrogate analysis results and communicate key outcomes to stakeholders
* Produce high‑quality technical reports supporting safety‑case substantiation
* Apply RR‑SMR gated review and quality‑assurance processes consistently
* Act as technical checker for analysis tasks and contribute to production of quality evidence
* Collaborate with multidisciplinary teams across design, safety and analysis functions
* Work in full compliance with health, safety, environmental and regulatory requirements
* Champion company values including diversity, equity and inclusion
Key Skills and Qualifications
* Experience performing severe accident or accident‑analysis studies
* Strong understanding of thermal‑hydraulic behaviour and accident phenomena in nuclear reactors
* Experience using numerical analysis tools and codes (e.g. MAAP or similar)
* Ability to develop, review and deliver technically complex analysis work packages
* Experience planning and delivering analysis activities to time, cost and quality
* Strong technical writing and report‑production skills
* Ability to communicate complex analysis clearly to technical and non‑technical audiences
* Familiarity with analysis method development and quality‑assurance processes
* Experience developing or using analysis tools (e.g. Python or MATLAB) – advantage
* Knowledge of PWR design, reactor behaviour and accident‑analysis safety‑case principles
* Understanding of E3S, ALARP and BAT principles
* Degree‑qualified to Master’s level (or equivalent) in a relevant discipline
* Working towards Chartered Engineer or Physicist status
Location
Hybrid working with one of the following as your primary site: Derby, Manchester or Warrington.
Salary and Package
Salary band: £50,650 to £66,500 dependent on skills, values and knowledge.
Benefits
* Bonus – Performance‑related target up to 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 the ability to buy or sell up to 4 days
* Private Medical Insurance – BUPA single cover
* Life Assurance – 6× pensionable pay
* Home Office Support – £250 one‑off payment for new starters
Equal Opportunity Employer
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.
Safety Screening Requirements
* 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
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