Senior Mechanical Engineer

Radiant is seeking a highly motivated Senior Mechanical Engineer to design and develop new hardware systems for the Kaleidos 1MW nuclear microreactor. The ideal candidate takes great ownership of their work end-to-end, is proficient in both design and analysis, and is excited to work in a highly cross-functional, fast-paced environment. You will be a key contributor to building the world's first mass-produced, rapidly-deployable nuclear reactor. 

Responsibilities & Duties 

• Mechanical Engineering ownership of components and subsystems, such as the following:  
• Reactor core pressure vessel design per Boiler & Pressure Vessel Code (BPVC).
• Reactor internal components and mechanisms.
• Radiation shielding and thermal insulation.
• Heat exchangers and other fluid system components.
• Transportation and assembly tooling.
• Conduct trade studies and develop designs to meet program requirements. 
• Perform detailed thermal and mechanical analysis (static strength, durability/fatigue) to determine structural integrity (margins of safety) using both hand calculations and finite element tools. 
• Develop and execute manufacturing/assembly instructions and test plans. 
• Create and manage a Bill-Of-Materials (BOM).  
• Find and develop suppliers for all components.
• Own subassembly design, manufacturing, and test schedules.
• Own risk analysis (FMEA) for subsystems.
• Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication. 

Required Qualifications & Skills 

• Bachelor’s degree from an accredited institution in Mechanical, Materials, Aeronautical, Civil or Structural Engineering. 
• 5+ years of experience conducting trade studies and designing mechanical components or subsystems.
• 5+ years of experience performing stress analysis (static and fatigue) using both hand calculations and finite element analysis (FEA) tools (Femap/NASTRAN, Abaqus, or similar).

Desired Qualifications & Skills 

• 5+ years of experience with design of multi-component assemblies in CAD (Solidworks or similar).
• 5+ years of professional experience designing hardware that was manufactured, deployed, and iteratively improved. 
• Solid understanding and application of GD&T.
• Track record of appropriate selection of analysis fidelity.
• Ability to derive free-body diagram and control volume-based models for systems.
• Experience performing CFD analysis (STAR-CCM+ or similar) for combined fluid/thermal modeling of systems.
• Experience performing fracture analysis using NASGRO / NASFLA. 
• Experience performing combined structural and thermal analysis of graphite and ceramic structural components. 
• Self-motivated with strong organizational, written, and oral communication skills. 
• Experience with using text-based software development tools (Python or similar).