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Spring Internship - Software Engineering

Radiant

Salary not specified
Nov 11, 2025
El Segundo, CA, US
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Radiant is building the world's first mass-produced, portable nuclear microreactors, aiming to provide a clean and reliable power source that can replace diesel generators for critical infrastructure like hospitals, data centers, and military bases.

Requirements

  • Proficient in at least one of the following programming languages: Python, C++, C, or another scientific computing language.
  • Proficient or advanced in one of following: OpenMC, MCNP, SCALE, MOOSE, Serpent, BISON, RELAP, CFD, Pronghorn, GRIFFIN, or other nuclear software packages
  • At least 1 year of software development experience:
  • C, C++, or Python development experience is preferred.

Responsibilities

  • Ownership of nuclear design and analysis focus areas, for example: Shielding: Assessing transport, operation, self-activation, environmental activation, and waste categorization, working with both customer and regulatory requirements.
  • Analysis: Run coupled core physics and thermal calculations to refine the thermal model in various scenarios.
  • Mechanical: Assess damage effects and bulk material properties changes due to high flux on ceramics and metals inside the core.
  • Fuel and waste: Model burnup distribution, design burnable absorber, and perform criticality assessments for transport and waste facility compatibility.
  • Reactor Physics: Develop control schemes and design control systems using transient simulations to finalize source sizing and detector selection.
  • Apply expertise and knowledge of nuclear industry standards and regulations.
  • Develop technical requirements for hardware systems, structures, and components, leading design reviews.

Other

  • Bachelor’s degree in nuclear engineering or equivalent degree from accredited institution.
  • 5+ years nuclear engineering industry experience.
  • Experience implementing nuclear regulatory requirements.
  • Master’s or PhD in nuclear engineering or equivalent degree from accredited institution.
  • Subject matter expert in one of following areas: criticality safety, fuel management, and/or radioactive material transportation.