TerraPower.
Principal Engineer, Safety Methods
Bellevue, Washington, United States · Principal
Sponsorship not specified$168k-$252kDetected 21 hours ago
PythonMATLABSASResearchCommunicationProblem Solving
About the role
- TerraPower is a nuclear technology company based in Bellevue, Washington.
- At its core, the company is working to raise living standards globally through a more affordable, secure, and environmentally friendly form of nuclear energy along with innovations in medical isotopes to improve human health.
- In 2006, TerraPower originated with Bill Gates and a group of like-minded visionaries who evaluated the fundamental challenges to raising living standards around the world.
Responsibilities
- Develop plant‑scale thermal‑hydraulic analysis methods, including modeling strategies, numerical approaches, and closure models.
- Perform steady-state and transient system‑level analyses to characterize model behavior, assess method performance, and define method fidelity requirements.
- Develop and maintain method qualification plans, including numerical verification, applicability envelopes, and performance characterization.
- Identify modeling gaps and drive method enhancement priorities using Phenomena Identification and Ranking Table (PIRT), sensitivity studies, and multi-physics needs.
- Develop automated workflows and tools for model setup, execution, post‑processing, and repeatable method application.
- Collaborate with test engineering to define data needs that inform method development (not for validation purposes, but to guide model formulation and closure development).
- Document modeling methodologies, assumptions, method applicability, and numerical performance for design processes and licensing‑support activities.
- Work across disciplines to ensure thermal‑hydraulic methods integrate effectively with plant design, safety analysis, and coupled simulation workflows.
- Demonstrated experience in developing or improving analysis methods, including numerical scheme development, closure model formulation, and stability/accuracy optimization strategies.
- Strong foundation in thermal‑fluids and reactor system behavior, including complex thermal‑hydraulic phenomena relevant to advanced reactor designs.
Requirements
- Minimal, with ability to safely lift up to 25 pounds.
- These functions may also constitute essential functions for the job which the employee must be able to fulfill, with or without accommodation.
- Travel required 0-10%
- Degree in Mechanical, Nuclear, Chemical Engineering, or similar field, with 12+ years of experience in system‑level thermal‑hydraulic modeling and method development for nuclear or complex energy systems.
Compensation
- Any salary offered within the posted salary band is based on market data and commensurate with the selected candidate's qualifications and experience.
- $168,316 - $252,475
- Salary, eligible to participate in discretionary short-term incentive payments
Benefits
- Comprehensive Medical and Wellness Benefits
- Life and Disability
- Gender Affirmation Benefits
- Parental Leave
- Generous Paid Time Off (PTO)
- 21 days of annually accrued PTO
- Generous Holiday Schedule
- Professional and Educational Support Opportunities
- TerraPower Career and Benefits information: https://www.terrapower.com/contact-us/careers/
- Candidates must meet the minimum education and experience criteria applicable to the role, including relevant nuclear industry experience where required.
Company info
- Verification of data will be part of the hiring process.
- To facilitate TerraPower's export control reviews, you will be asked as part of the
Visa & Work Authorization
- Government export control requirements
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This listing is sourced directly from TerraPower.'s careers page and normalized into a canonical job model.