About the role#
Radiant is looking for a Nuclear Engineer Intern to join our team for the Summer 2027 term. You will work on the Kaleidos microreactor project, helping us refine performance models and safety analysis. This is a full-time, on-site role based at our headquarters in El Segundo, California.
What you'll do#
- Assist with design and analysis tasks covering shielding, neutronics, thermal, and fuel studies.
- Support coupled neutronics and thermal calculations to refine system performance models.
- Develop lower order shielding analysis models for rapid design solutions.
- Execute uncertainty propagation methodology for the Kaleidos Demonstration Unit.
- Perform criticality safety analysis for the Kaleidos production plant.
- Collaborate with cross-functional teams and contribute technical input throughout projects.
- Document your methods, results, and findings in technical reports and presentations.
- Present a final project review to our engineering team and leadership at the end of the term.
What you'll need#
- Currently pursuing a BS or MS in Mechanical Engineering, Nuclear Engineering, or a related field.
- A strong academic foundation in reactor physics, thermal-hydraulics, or radiation shielding.
- Proficiency in at least one programming language such as Python, C++, or C#.
- Hands-on experience with nuclear system design or analysis through labs, research, or coursework.
- Familiarity with simulation codes like OpenMC, Serpent, MCNP, MOOSE, BISON, RELAP, CFD, Pronghorn, or GRIFFIN.
- Exposure to software development practices including version control, testing, or documentation.
- Strong communication skills and the ability to work well in a team.
- Interest in our mission to deploy portable nuclear microreactors for clean energy in remote locations.
Location & details#
- This internship is located on-site in El Segundo, California.
- The position is paid and full-time.
- This role involves access to technology subject to U.S. export controls. Any offer is contingent upon your ability to comply with these regulations.
About Radiant
Radiant produces portable nuclear microreactors. The company is based in El Segundo, California and employs between 51 and 200 people. It was founded in 2020. The firm is currently developing a 1 MW failsafe microreactor known as Kaleidos.
How to get in at Radiant
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