Principal Engineer, Safety Analysis
TerraPowerBellevue, WA
Full Time
Posted October 27, 2026
$152k - $197k
Apply Now
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 October 28, 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
Reporting to Manager, Transient Safety Analysis, the Principal Safety Analysis Engineer is primarily responsible for performing safety analyses of the Natrium Demonstration reactor, and support design transient analysis, Structures, Systems and Components (SSC) classification, development of analytical models and metho
Key Responsibilities
- Develop system models and perform safety analysis of Anticipated Operational Occurrence (AOO), Design Basis Event (DBE), and Design Basis Accident (DBA) for the Natrium Demonstration reactor.
- Collaborate with cross-functional teams to establish core and reactor SSC functional, performance, safety, and quality requirements as well as support the overall design.
- Collaborate with cross-functional teams to integrate NEI 18-04 Licensing Basis Event (LBE) analyses and findings into licensing documentation and project design activities.
- Contribute to the safety method development, such as code assessment, scaling analysis, code verification and validation activities, etc.
- Develop and maintain documentation of model development and analysis results.
- Perform engineering reviews of other engineering analysis and design deliverables, such as ASME design transients
- Assess plant transient benchmark tests, identify applicable tests relevant to the Natrium reactor and perform benchmark calculations.
- Contribute to the TerraPower software framework implementation of capabilities required for transient and accident analysis.
Requirements
- Extensive experience in nuclear transient safety analysis, nuclear reactor system modeling, Best Estimate Plus Uncertainty (BEPU) analysis and/or computer code development.
- Extensive experience with safety analysis software such as RELAP5, TRACE, TRAC, SAS4A/SASSYS-1, GOTHIC, MELCOR, SAM, or other nuclear system analysis software.
- Experience in transient and accident analysis for submittals to NRC, such as Chapter 15 in the Final Safety Analysis Report (FSAR), is highly desired.
- Knowledgeable of nuclear systems thermal-hydraulic fundamentals as well as reactor dynamics and transient phenomena.
- Knowledgeable of nuclear reactor core physics such as neutron transport theory and reactivity feedback.
- Knowledgeable of nuclear reactor instrumentation and control systems, and related modeling approaches in the safety analysis computer code.
- Familiarity with nuclear design, regulatory requirements, and risk-informed performance-based technology guidance for Non-Light Water Reactors is required.
- Familiarity with EMDAP and Regulatory Guide 1.203 is preferred.
- Experience with SFR safety analysis or methods is highly desirable. Experience with other reactor designs, such as Light Water Reactors (LWRs), can be considered when differentiating candidates.
- Demonstrated strong quantitative, analytical, modeling and reporting skills.
- Understanding NQA-1 requirements associated with analysis and software management as well as experience working under a quality assurance program.
- Experience in working in multi-disciplinary engineering teams to address engineering challenges.
- Strong software engineering skills in any language, such as Python, Fortran, or C++, is a plus.
- B.S., M.S. or Ph.D. in nuclear engineering, or other relevant engineering degree, with a minimum of 5 years’ experience in the nuclear field.
- 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
Get new power and energy jobs weekly
New jobs across data centers, grid, nuclear, storage, generation, and renewables. One email a week.
Job Alerts
Get alerts for jobs like this one