Job Description

Plant Integrated Analysis Engineer

Location: Bellevue, WA

Job Type: Contract

Work Model: Hybrid (Primarily Remote)

Schedule: 40 hours/week

System One is seeking a highly motivated Plant Integrated Analysis Engineer to support the development of advanced sodium-cooled nuclear reactor technology. This role will focus on plant-level thermal-hydraulic analysis, transient modeling, and control system performance to support reactor design, safety, and operational excellence.

Working as part of a multidisciplinary engineering team, you'll collaborate with safety, instrumentation & controls (I&C), and system design engineers to model, analyze, and validate complex plant systems.

Responsibilities

• Develop and maintain RELAP5-3D models for steady-state and transient one-dimensional hydraulic network analyses.
• Perform plant-level thermal-hydraulic analyses for normal operating conditions, upset events, and emergency scenarios.
• Develop, evaluate, and optimize plant control strategies and component-level control systems.
• Perform first-principles engineering calculations involving heat transfer, fluid dynamics, and thermodynamics.
• Analyze plant-wide transients to support operational strategies and reactor design improvements.
• Conduct multidisciplinary analyses involving sodium, molten salt, and non-condensable fluid systems.
• Collaborate with system, component, fuel, safety, and I&C engineering teams.
• Support the development, validation, and improvement of analytical methods and modeling approaches.
• Prepare technical documentation and communicate analysis results to cross-functional engineering teams.

Required Qualifications

• Bachelor's degree or higher in Nuclear Engineering, Mechanical Engineering, Electrical Engineering, or a related engineering discipline.
• Experience using thermal-hydraulic system analysis codes such as RELAP5 or TRACE .
• Strong experience performing one-dimensional hydraulic network and transient thermal-hydraulic analyses.
• Solid understanding of heat transfer, fluid mechanics, and thermodynamics.
• Excellent analytical, technical writing, and communication skills.

Preferred Qualifications

• Experience modeling plant control systems and Instrumentation & Controls (I&C).
• Background supporting commercial or advanced nuclear power plant design or operations.
• Experience developing or improving analytical methods and engineering models.
• Experience working within a highly regulated engineering environment.

Additional Information

• Travel: Up to 5%
• Work Environment: Primarily remote with occasional onsite collaboration.
• Physical Requirements: Standard office environment with the ability to sit or stand for extended periods and lift up to 25 pounds as needed.

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