TerraPower
Principal Engineer, Safety Methods
$140K–$182K
Bellevue, Washington, United States +1 · Principal · Full-time · Posted May 21, 2026
- Location
- Bellevue, Washington, United States
Bellevue, WA - Experience
- 8 plus years in the field of system-level thermal-hydraulic analysis and code assessment for nuclear or complex energy systems.
- Education
- Degree in Mechanical, Nuclear, Chemical Engineering, or similar field.
- Visa sponsorship
- Applicants who are foreign nationals (other than asylees, refugees, or lawful permanent residents) are evaluated under U.S. Government export control requirements. Applicants are asked to identify their U.S. citizenship or immigration status for export-control review; consideration may depend on whether timely government export approval is practicable.
About the job
Develops and qualifies plant-scale thermal-hydraulic analysis methods and models for the Natrium reactor, supporting accurate predictions of plant behavior and safety analysis.
What you'll do
- Develop and carry out code assessment, verification, validation, and uncertainty quantification, including model-to-test comparisons.
- Perform scaling analysis and use experimental data to validate models, identify technical gaps, and coordinate validation needs with test engineering teams.
- Document methodologies and results, support design and licensing workflows, apply modeling quality practices, and mentor junior engineers.
What they ask for
- Degree in Mechanical, Nuclear, Chemical Engineering, or a similar field.
- 8 plus years in system-level thermal-hydraulic analysis and code assessment for nuclear or complex energy systems.
- Demonstrated code assessment experience, including model-to-test comparison, validation metric development, and uncertainty quantification.
- Hands-on experience with experimental thermal-hydraulic data and proficiency with system analysis tools such as RELAP5‑3D, TRACE, SAS, or equivalent.
Nice to have
- Experience with SQA and NQA‑1 quality assurance practices for modeling workflows.
Pay
$140,021 – $181,845 USD base salary
Tools
RELAP5‑3D, TRACE, SAS, SQA, NQA‑1
Model-written summary · the original posting is authoritative