Summer 2026 Internship - Nuclear Engineer
Radiant Systema year ago
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OnsiteInternEntry
Summary
Radiant System is seeking a Summer 2026 Internship - Nuclear Engineer to join their team in El Segundo, CA. The role involves supporting the design and analysis of nuclear systems for a 1MW HTGR nuclear microreactor.
About the Role
As a Nuclear Engineering Intern, you will assist with nuclear design and analysis tasks, including shielding, neutronics, thermal, and fuel-related studies. You will support coupled neutronics and thermal calculations, document methods and findings, collaborate with cross-functional teams, and perform criticality safety analysis for the Production Plant of Kaleidos reactors. This internship offers direct mentorship in a fast-paced startup environment, providing a unique opportunity to contribute to the development of the first new fueled reactor design in over 50 years.
About You
Required:
- Currently pursuing a bachelor’s or master’s degree in nuclear engineering or a related discipline.
- Strong academic foundation in nuclear engineering principles (e.g., reactor physics, thermal-hydraulics, radiation shielding).
- Proficiency in at least one programming language (Python, C++, C#, or similar).
Preferred:
- Hands-on experience through coursework, research, projects, or labs in nuclear system design or analysis.
- Familiarity with nuclear simulation codes (e.g., OpenMC, Serpent, MCNP, MOOSE, BISON, RELAP, CFD, Pronghorn, GRIFFIN).
- Prior software development experience or exposure to version control, testing, or documentation practices.
- Strong communication skills and ability to work in a collaborative team environment.
- Enthusiasm for Radiant’s mission to rapidly deploy nuclear microreactors to provide clean energy in remote locations.
Benefits
- Substantial incentive stock plan for all full-time employees.
- 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
- Sponsored memberships for employees and their dependents.
- 100% top tier plan coverage + 50% for dependents for vision.
- 100% top tier plan coverage, orthodontia extra, 50% for dependents for dental.
- Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
- 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
- Daily catered lunch. Free snacks and drinks.
- Flexible PTO policy. Remote workday allocation.
- Company and team-bonding events, happy hours and in-person camaraderie.
- Beautiful El Segundo headquarters close to the Pacific Ocean.
Radiant System
Radiant System is an international company with offices in Prague, Czech Republic, and Moscow, Russia. From 2010 to 2015 we used to be an official certified OTRS AG partner. During these 5 years we became experts in OTRS solutions and gained an immensely valuable experience in OTRS professional services, including consulting, implementation, support, training and custom development. We also developed a large number of original add-ons, which quickly became very popular among our clients. As of 2016, we decided to go our own way. The natural next step was to develop a series of new, unique add-ons based on OTRS - our New Customer Portal is the very best example of our latest achievements. And this is not all we have in our rich arsenal!
El Segundo, CA