Engineering Internship-All Disciplines

El Segundo, CA

Radiant Industries is an El Segundo, CA-based startup developing Kaleidos, a portable, containerized nuclear microreactor. Portable nuclear power with rapid deploy capability can replace diesel generators used today to provide critical asset support for hospitals, datacenters, and military bases or to power microgrids at remote sites. Radiant’s unique yet practical approach to nuclear development utilizes modern software engineering to rapidly achieve safe, factory-constructable microreactors leveraging existing, well-qualified materials. Radiant is on a fast track to demonstrate the first fueled operation of a new commercial nuclear reactor design, just four years from now. 

Radiant is seeking highly motivated engineering interns for an opportunity to work with mentorship and guidance from experienced engineering professionals in a fast-paced startup environment. The candidate could be responsible for various aspects of the mechanical, software, or nuclear design development as priorities shift and expertise is gained.   

 Responsibilities and Duties 

  • Engineering ownership of component design, examples: 

    • Primary and secondary cooling loops 

    • Structures and mechanisms of the reactor including control drums and actuators, plenums, vessels, shields and enclosures among others 

    • Reactor core neutronics, mechanical, and fluids design and modeling 

    • Real-time plant physics simulations spanning all disciplines 

    • Power electronics, instrumentation, and controls systems. 

  • Develop and execute manufacturing, assembly, 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.  

  • Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication. 

Required Qualifications & Skills 

  • Must be at least a Junior standing or higher at an accredited college program in mechanical, nuclear, fluids, materials, electrical engineering, or computer science backgrounds or a related field. 

  • Understand physics fundamentals relevant to your discipline: neutron transport, heat transfer, fluid dynamics, structural mechanics, electronics. 

  • Self-motivated with strong organizational, written, and oral communication skills 

  • Hands-on experience designing hardware that was manufactured, deployed, and iteratively improved. 

  • Ability to relocate to Radiant’s office in El Segundo, CA (Greater Los Angeles Area). 

  • Ability to work at least a 12-week internship program 

  • Ability to work or gain permission to work on export - controlled technologies based in the United States. 

Desired Qualifications & Skills 

  • Senior or Advanced Degree student with previous work experience in a related field 

  • Software development experience preferable for all candidates: 

    • C, C++, or Python development experience is preferred. 

    • Prior use of code repositories, unit testing, performance benchmarking, and software review / release processes. 

    • Familiarity with good documentation practices and implementation of style guidelines. 

  • Analysis experience in Monte Carlo neutron transport codes: Serpent, MCNP, OpenMC 

  • MOOSE framework and applications: BISON, RELAP-7, THM, Griffin, Pronghorn, Grizzly, Marmot 

  • Reactor design optimization on neutron and gamma shielding, core fuel/moderator ratio 

  • Practical experience sourcing, modeling, and testing using nuclear materials 

  • Coursework or project experience designing heat engines, fluid loops, mechanical structures, actuator, seals, vibration 

  • FEMAP/NASTRAN, ANSYS, Cubit, Siemens NX, and Teamcenter 

  • Embedded electronics and automation 



Competitive Hourly Salary  

Flight coverage for travel to and from home location  

Exposure to a rapidly growing, innovative startup  

Ability to interface directly with all levels of an organization