Senior Nuclear Thermal-Hydraulics Engineer — Onsite El Segundo

Radiant Industries, Inc.; El Segundo (CA); On-site; USD 150,000 - 210,000; Full time

Benefits offered by this job

Stock options

Medical plan

One Medical

Vision plan

Dental plan

Life insurance

Parental leave

Lunch provided

Flexible PTO

Team events

Oceanfront HQ

Job summary

Radiant Industries, Inc. seeks a Senior Nuclear Thermal-Hydraulics Engineer to lead thermal-hydraulics analysis for the Kaleidos microreactor.

You will own the modeling of heat, coolant, and core behavior under normal and accident conditions, informing design, cooling systems, and safety cases for a factory-built reactor. The role targets engineers with reactor-specific thermal-hydraulics or coupled multiphysics experience who want to apply depth to a fast-moving program, with 100% onsite work

Qualifications

• Bachelor's degree in nuclear engineering, mechanical engineering, physics, or similar field from an accredited institution.
• 5+ years of relevant industry or national laboratory experience.
• Experience with thermal-hydraulics analysis and/or reactor systems codes (e.g., RELAP5, TRACE, COBRA-TF, SAM, TRANSFORM).
• Experience with high-temperature (500°F+) heat transfer analysis involving conduction, convection, and radiation.
• Experience communicating and distilling technical information with cross-functional teams.

Responsibilities

• Own and execute thermal-hydraulics analysis to evaluate design and safety performance of Kaleidos reactor systems under normal and accident conditions.
• Develop and apply coupled physics models integrating thermal-hydraulics with neutronics and/or structural response.
• Identify and implement best practices for reactor thermal-hydraulics and systems-code analysis.
• Build automated workflows to expand simulation capabilities, accuracy, and efficiency.
• Collaborate across reactor physics, mechanical, and safety teams to support licensing and design trade studies.

Skills

Thermal-hydraulics

Cross-functional comms

Reactor systems codes

High-temperature heat transfer

Education

B.S. in nuclear/mechanical/physics

Tools

RELAP5

TRACE

COBRA-TF

STAR-CCM+

ANSYS Fluent

Siemens NX

Job description

Radiant Industries, Inc. seeks a Senior Nuclear Thermal-Hydraulics Engineer to lead thermal-hydraulics analysis for the Kaleidos microreactor.

You will own the modeling of heat, coolant, and core behavior under normal and accident conditions, informing design, cooling systems, and safety cases for a factory-built reactor. The role targets engineers with reactor-specific thermal-hydraulics or coupled multiphysics experience who want to apply depth to a fast-moving program, with 100% onsite work