Senior/Staff Nuclear Safety Analysis Engineer

Antares Industries is seeking a Senior or Staff Nuclear Safety Analysis Engineer to take ownership of the safety analysis product delivered in support of the final design of the Mark 1 reactor. This individual will lead intact-event (non-breach) safety analysis, drive source term calculations rooted in TRISO fuel behavior and qualification, and translate reactor physics and neutronics uncertainty into radiological dose results. The role requires the judgment to scope phenomenological work appropriately—rigorous enough to defensibly bound figures of merit, without being exhaustive—and the independence to coordinate across every design discipline, the licensing team, and the testing and materials organizations. This is a technical ownership role: the successful candidate will be accountable for the quality, defensibility, and timeliness of safety analysis deliverables that directly support licensing of Mark 1 and inform the technical basis for follow-on designs.

Roles and Responsibilities:

• Take end-to-end technical ownership of the safety analysis deliverables supporting final design of the Mark 1 reactor scope, technical approach, schedule, and quality.
• Perform and oversee deterministic safety analysis of intact (non-breach) events. Apply Phenomena Identification and Ranking Table (PIRT) methods and other systematic scoping approaches to focus analysis on dominant phenomena, ensuring figures of merit are adequately and defensibly bounded without exhaustive, low-value modeling.
• Develop source term calculations that account for TRISO fuel behavior and qualification, including mechanistic failure of fuel layers (e.g., buffer/IPyC/SiC/OPyC) under irradiation and elevated temperature, fission product release and transport, radionuclide grouping, and identification of dominant dose drivers.
• Understand and quantify how neutronics model uncertainties (power distribution, burnup/depletion, isotopics, cross-section data) propagate through fuel performance and source term models into final dose calculations.
• Work independently across all design disciplines (core, fuel, mechanical, materials, I&C, plant systems) to define analysis inputs and design-basis requirements, and interface directly with the licensing team to shape license application content, respond to regulator requests for additional information (RAIs), and support licensing evidence documentation development.
• Identify where test and qualification data (fuel performance, materials, thermal-hydraulic phenomena) is sparse, uncertain, or absent, and partner with the testing and materials teams to define a credible success path for closing those gaps for Mark 1 and beyond.
• Drive cross-team efforts to verify and validate (V&V) the codes, methods, and tools used in safety analysis, ensuring they are qualified under the applicable nuclear quality program for use in licensing-basis calculations.
• Author and review quality-affecting technical documentation — calculation packages, methodology reports, safety analysis reports, and topical report content — to a standard suitable for regulatory submittal.
• Provide technical mentorship to less experienced engineers on safety analysis phenomenology, tools, and methods, and help build organizational depth in these areas.

Basic Qualifications:

• B.S. in Nuclear, Mechanical, or a related field (M.S. or Ph.D. preferred)
• 4+ years of relevant reactor safety analysis experience, or an equivalent combination of education and experience.
• Demonstrated hands-on experience with at least one system-level thermal-hydraulic / systems analysis code (e.g., RELAP5-3D, TRACE, SAM, GOTHIC, SAS4A/SASSYS-1, MELCOR, or equivalent), with a track record of learning new phenomenology.