Remote Nuclear Safety Analysis Engineer - Reactor Licensing

System One; Bellevue (WA); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

Spending accounts

Life insurance

Voluntary plans

401(k) plan

Job summary

System One is seeking a contract Safety Analysis Engineer to perform deterministic nuclear safety analysis and transient/accident modeling (RELAP5-3D or similar) to support NRC licensing submittals for the Natrium reactor. This remote role supports US-based work.

You will develop and document system models, analyze DBAs/LBEs, prepare FSAR-style reports, and collaborate across engineering teams on methods development, V&V, benchmarking, and uncertainty studies.

Qualifications

• Extensive experience in nuclear safety analysis and reactor system modeling.
• Proficiency with safety analysis software such as RELAP5-3D, TRACE, TRAC, SAS4A/SASSYS-1.
• Experience in transient and accident analysis for NRC submittals (e.g., Chapter 15 FSAR).
• Strong knowledge of nuclear systems thermal-hydraulics, reactor physics, and transient phenomena.
• Familiarity with nuclear reactor instrumentation, control systems, and safety regulation compliance.
• Degree: B.S. in nuclear engineering with 10+ years or MS/Ph.D. with 5-7+ years of nuclear engineering or relevant field.
• Demonstrated analytical, modeling, and reporting skills.
• Experience working in multidisciplinary teams and under quality assurance programs (NQA-1).
• Strong software engineering skills in Python, Fortran, C++, or similar are a plus.

Responsibilities

• Perform deterministic safety analysis using RELAP5-3D code for the Natrium sodium fast reactor.
• Analyze design basis accidents (DBAs) and licensing basis events (LBEs) to support reactor licensing with US NRC.
• Model and integrate various plant systems within safety analysis computer codes.
• Develop safety analysis reports, including the Final Safety Analysis Report (FSAR).
• Collaborate with cross-functional teams on core and reactor SSC requirements and licensing documentation.
• Contribute to safety method development, code assessment, scaling analysis, and validation activities.
• Maintain documentation of models and analysis results.
• Conduct engineering reviews of analysis and design deliverables.
• Assess plant transient benchmark tests and perform relevant benchmark calculations.
• Support implementation of software capabilities for transient and accident analysis.

Skills

Nuclear safety analysis

Reactor system modeling

Python

Fortran

C++

NQA-1

Education

Bachelor's degree in Nuclear Engineering

Master's or PhD in Nuclear Engineering or related field

Tools

RELAP5-3D

TRACE

TRAC

SAS4A/SASSYS-1

Job description

System One is seeking a contract Safety Analysis Engineer to perform deterministic nuclear safety analysis and transient/accident modeling (RELAP5-3D or similar) to support NRC licensing submittals for the Natrium reactor. This remote role supports US-based work.

You will develop and document system models, analyze DBAs/LBEs, prepare FSAR-style reports, and collaborate across engineering teams on methods development, V&V, benchmarking, and uncertainty studies.