Role SummaryAs Reactor Systems Engineer, you define the arrangement of the primary system and build the thermal-hydraulic models that prove it works in all design basis conditions. Your analysis is the throughline between arrangement decisions, safety margins, and the licensing case that lets a reactor operate at sea.
This is a role we're hiring at multiple levels (L1 through L4). The work is shared across levels; scope and accountability scale with experience.
What You'll DoAt all levels, you will:- Define and maintain the arrangement of the primary system and its interfaces with supporting systems
- Build, run, and maintain system thermal-hydraulic models spanning steady-state, transient, and accident design basis scenarios
- Analyze decay heat removal architectures and demonstrate adequate cooling for design basis events, accounting for the maritime environment
- Couple system models with neutronics and structural inputs to support multiphysics and transient studies
- Document analysis results and V&V methodology in support of the licensing process
- Provide primary system and accident-response information to our safety analysis, simulator, and operations teams
At more senior levels you will additionally: - Lead trade studies that balance arrangement, component sizing, and safety margins across the primary system
- Own the licensing basis documentation and justify methodology
- Mentor newer engineers and review their thermal-hydraulic analyses
- Drive cross-team coupling decisions with our neutronics and structural teams on multiphysics studies
What You BringRequired at all levels- Bachelor's degree in Nuclear or Mechanical Engineering, or equivalent practical experience
- Experience building and running system thermal-hydraulic models of nuclear plants, with working knowledge of one or more reactor systems codes (e.g. RELAP5-3D, TRACE)
- Strong understanding of primary system behavior: natural circulation, two-phase flow, and the tradeoffs between active and passive cooling
- Working knowledge of decay heat removal design and the design basis events that size it
- Ability to work on a close, rapidly iterative design team and translate analysis into arrangement decisions
Preferred- Familiarity with multiple system and subchannel/CFD tools (e.g. RELAP5-3D, TRACE, GOTHIC, COBRA, STAR-CCM+) and with coupling system models to neutronics
- Experience supporting safety analysis and licensing basis development (DBAs, LOCA/non-LOCA, station blackout)
- Strong technical writing skills, particularly for regulator-facing documentation
Don't meet every bullet? We'd still like to hear from you. If you're excited by the mission and most of this resonates, apply.
Export control noticeThis role involves access to information subject to U.S. export control laws, including unclassified nuclear technology governed by the U.S. Department of Energy under 10 CFR Part 810. Depending on a candidate's status, access may require DOE authorization, which Ocean Atomics may apply for. Any offer is contingent on your ability to work in compliance with these requirements. We evaluate all applicants regardless of citizenship or national origin, except where required by law.
