Nuclear Fuels Performance Engineer
TerraPowerBellevue, Washington
Full Time
Posted September 23, 2026
$154k - $205k
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Application opens on company website
Listing evidence and provenance
- Source
- greenhouse View original listing
- Freshness
- Open in the current public read path; this is not an employer guarantee.Last observed September 29, 2026
- Classification
- Modern power-system classification not yet published for this listing.Legacy source industry field: Nuclear Energy
- Pay provenance
- Employer-provided pay
Job Description
TerraPower, LLC is seeking a highly motivated Nuclear Fuels Performance Engineer.
Key Responsibilities
- Perform thermo-mechanical analysis of fuel rods and other sodium fast reactor core components for: Core Design, Code Benchmarking and Validation, and Irradiation Testing (Design of Experiments and Post-Irradiation Examination analysis)
- Interface with cross-functional groups to inform and resolve component and system design decisions
- Document results of thermo-mechanical analyses in the form of engineering reports, engineering calculations, test plans, etc.
- Design and execute sensitivity studies to understand the effects and validity of various modeling assumptions, including meshing, physics coupling, material models, and design tolerances
- Support software and document reviews in areas of fuel performance modeling, fuel performance, or other areas of subject expertise
- Build and apply methods to assess the propagation of uncertainty and their effect on safety margins, especially relative to irradiation test design
- Enhance engineering team's ability to build models and make meaningful conclusions from simulation output through input tools, visualization, reports, etc.
- Prepare test plans and documentation to support irradiation and performance testing of nuclear fuels.
- Create formal documentation of nuclear fuels methods software requirements, design, implementation, and testing in support of licensing TerraPower reactors.
- Update, improve, and/or create software to satisfy all licensing requirements during the Verification and Validation (V&V) process
Requirements
- Advanced degree in Nuclear, Mechanical, or Materials Engineering or equivalent and 4+ years of relevant experience preferred
- Fast reactor physics and design intuition highly desired
- Experience in understanding and executing nuclear design and analysis methodologies; ideally with a focus on fast-neutron reactors
- Excellent knowledge of the methods of reactor physics analysis, finite element models, constitutive material models
- Experience in performing design activities to applicable requirements such as NQA-1, ASME B&PV, AWS, 10 CFR 50, Appendix B, or equivalent
- Experience using ABAQUS, ANSYS, COMSOL, MOOSE, or an equivalent FEA code
- Proven ability to integrate and automate simulation tools
- Strong programming skills in any language required. Preferred programming language experience with Python and Fortran
- Demonstrable capabilities with fundamental software development tools (e.g. IDEs, version control, profilers, debuggers, documentation builders, packaging tools)
- Experience interacting on nuclear methodology with the NRC under an ASME NQA-1 compliant QA environment preferred
- Good working knowledge of general numerical methods and applied mathematics (e.g., PDEs, numerical stability, statistics, numerical analysis, dynamics)
- Strong formal technical documentation skills required
- Ability to consistently deliver to an aggressive schedule
- Self-motivated: able to seek out tasks and produce value aligned with team goals without waiting for next assignment
- Passion for and dedication to software best practices
- Willingness to openly give and accept professional criticism through code reviews and other venues
- Strong verbal communication skills desired
- The successful candidate will possess a high degree of trust and integrity, communicate openly and display respect, and a desire to foster teamwork
- This position is subject to qualification requirements in accordance with ANSI/ANS 3.1. Candidates must meet the minimum education and experience criteria applicable to the role, including relevant nuclear industry experience where required. Verification of data will be part of the hiring process.
Benefits & Perks
- Competitive Compensation
- Salary, eligible to participate in discretionary short-term incentive payments
- Comprehensive Medical and Wellness Benefits Medical Vision Dental Life and Disability Gender Affirmation Benefits
- Parental Leave
- 401k Plan
- Generous Paid Time Off (PTO) 21 days of annually accrued PTO
- Generous Holiday Schedule 10 paid holidays
- Relocation Assistance
- Professional and Educational Support Opportunities
- TerraPower Career and Benefits information: https://www.terrapower.com/contact-us/careers/
Ready to Apply?
Apply directly on TerraPower's site
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