Senior Thermal CFD Engineer – Nuclear Microreactors

Radiant; El Segundo (CA); On-site; USD 140,000 - 225,000; Full time

Benefits offered by this job

Stock plan

Medical benefits

Lunch provided

Flexible PTO

Parental leave

Job summary

Radiant is seeking a Senior Thermal Modeling Analyst in El Segundo, CA to design, develop, and implement simulations for the Kaleidos microreactor. You will drive high-fidelity CFD/FEA analyses, tackle multi-physics challenges, and contribute to safety, reliability, and performance decisions across reactor systems.

You will collaborate with cross-functional teams, build automated workflows, and advance modeling capabilities for rapid commercialization of the first mass-produced nuclear reactor.

Qualifications

• Bachelor’s degree in engineering, physics, or similar field from an accredited institution.
• 5+ years of relevant industry experience.
• Proficiency with STAR-CCM+ and Ansys Fluent.
• CAD experience with Siemens NX.
• Mastery of finite element and computational fluid dynamics modeling principles and methods.
• Experience communicating and distilling information with cross-functional teams.

Responsibilities

• Own and execute thermal CFD analysis to evaluate design and performance of Kaleidos reactor systems.
• Develop and implement solutions to model turbulent flow, heat transfer, and multi-physics interactions.
• Identify and implement CFD simulation best practices.
• Build automated workflows to expand simulation capabilities, accuracy, and efficiencies.
• Collaborate across teams and disciplines to support design of reduced order analysis methods.

Skills

CFD

STAR-CCM+

Ansys Fluent

Finite Element Analysis

Thermal Modeling

Cross-functional collaboration

Education

Bachelor’s degree in engineering, physics, or similar

Tools

STAR-CCM+

Ansys Fluent

Siemens NX

Job description

Radiant is seeking a Senior Thermal Modeling Analyst in El Segundo, CA to design, develop, and implement simulations for the Kaleidos microreactor. You will drive high-fidelity CFD/FEA analyses, tackle multi-physics challenges, and contribute to safety, reliability, and performance decisions across reactor systems.

You will collaborate with cross-functional teams, build automated workflows, and advance modeling capabilities for rapid commercialization of the first mass-produced nuclear reactor.