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Aalo Atomics is pioneering factory-fabricated microreactors to deliver affordable, scalable, and reliable nuclear power globally. The company is based in Austin, TX and is rapidly growing as it works to deploy the world's first fleet of advanced microreactors.
You will lead mechanical design and ASME BPVC Section III compliance for reactor vessels, pressure-boundary components, supports, and penetrations on the Aalo-1, a 10 MWe sodium-cooled, graphite-moderated reactor. This is a hands-on, independent contributor role in a fast-paced startup environment where you will contribute immediately across design, analysis, certification, and manufacturing support.
Key responsibilities include:
**Section III Design & Code Compliance:**
- Lead mechanical design and ASME BPVC Section III compliance for reactor vessels and pressure-boundary systems.
- Perform and own Section III code calculations for pressure, thermal, fatigue, buckling, seismic, and other design-basis and service-level loads.
- Classify components and systems per NCA/NB/NC/ND requirements, establishing the design classification framework for reactor pressure-boundary and safety-related equipment.
- Apply Section III rules (Subsections NB, NC, ND, NF, and NE as applicable) to pressure vessels, piping, supports, and containment structures, ensuring correct load combinations, stress limits, and service-level criteria.
- Develop Design Specifications, Design Reports, and Overpressure Protection Reports in accordance with Section III requirements.
- Evaluate elevated-temperature design considerations including creep, creep-fatigue, and thermal ratcheting where applicable.
**ASME Stamp Certification:**
- Support demonstration projects for ASME N-stamp (nuclear vessels), G-stamp (nuclear supports), and GC-stamp (nuclear containment vessels).
- Develop technical deliverables, procedures, and documentation required for stamp certification, including Quality Assurance program support, Design Reports, and coordination with the Authorized Nuclear Inspector (ANI).
- Work with quality and manufacturing teams to establish compliant fabrication, examination, and testing processes that satisfy stamp requirements.
**Design Execution:**
- Own designs from concept through release, fabrication support, testing, and verification.
- Create CAD models, drawings, specifications, and calculation packages.
- Partner with cross-functional teams (manufacturing, materials, quality, licensing) to resolve design, fabrication, and compliance challenges.
- Lead design reviews and communicate technical assumptions, risks, and trade-offs.
- Support prototype builds, supplier engagement, fabrication issues, and testing.
**Requirements:**
- Bachelor's degree in Mechanical Engineering or related discipline.
- 7+ years of relevant mechanical design experience with pressure vessels, pressure-retaining equipment, or nuclear mechanical systems.
- Expert knowledge of ASME BPVC Section III and its application to pressure-boundary design, including familiarity with Subsections NCA, NB, NC, ND, and NF.
- Demonstrated experience with Section III design classification, code calculations, and design report preparation.
- Strong CAD and FEA skills (ANSYS or equivalent).
- PE license is a plus.
- Must be based in the United States and willing to work on-site in Austin, TX or Idaho Falls, ID.
- Must be a U.S. Citizen or U.S. Person in compliance with 10 CFR Part 810.
