TerraPower
Senior Engineer, Safety Methods
$132K–$171K
Bellevue, Washington, United States +1 · Senior · Full-time · Posted May 21, 2026
- Location
- Bellevue, Washington, United States
Bellevue, WA - Experience
- 3+ years in system-level thermal-hydraulic modeling and method development for nuclear or complex energy systems; relevant nuclear industry experience where required by applicable criteria.
- Education
- Degree in Mechanical, Nuclear, Chemical Engineering, or similar fields.
- Visa sponsorship
- Applicants who are foreign nationals (other than asylees, refugees, or lawful permanent residents) are subject to U.S. Government export control review; applicants are asked to identify their U.S. citizenship or immigration status, and the company may not consider applicants from countries where timely export approval is impracticable.
About the job
Develops and qualifies system-level thermal-hydraulic methods and analyses supporting the Natrium Demonstration reactor’s design and licensing.
What you'll do
- Develop and qualify thermal-hydraulic analysis methods, including numerical approaches, closure models, and empirical correlations.
- Perform steady-state and transient analyses, sensitivity studies, and method-performance assessments.
- Build automated analysis workflows and document methods for design and licensing support.
What they ask for
- Degree in Mechanical, Nuclear, Chemical Engineering, or a similar field.
- 3+ years of experience in system-level thermal-hydraulic modeling and method development for nuclear or complex energy systems.
- Experience developing or improving analysis methods, including numerical schemes and closure models.
- Experience with system-level thermal-hydraulic analysis tools such as RELAP5 3D, GOTHIC, SAS, or equivalent.
Nice to have
- Familiarity with scientific programming and workflow automation, such as Python or MATLAB.
- Familiarity with NQA 1 quality assurance for modeling workflows.
Pay
$131,828 – $171,206 USD base salary
Tools
RELAP5 3D, GOTHIC, SAS, Python, MATLAB, NQA 1
Model-written summary · the original posting is authoritative