Senior Nuclear Engineer @ Radiant

Radiant Industries is an El Segundo, CA-based startup developing Kaleidos, a portable, containerized nuclear microreactor. Portable nuclear power with rapid deploy capability can replace diesel generators used today to provide critical asset support for hospitals, datacenters, and military bases or to power microgrids at remote sites. Radiant’s unique, practical approach to nuclear development utilizes modern software engineering to rapidly achieve safe, factory-constructable microreactors leveraging existing, well-qualified materials. Radiant is on a fast track to demonstrate the first fueled operation of a new commercial nuclear reactor design, just two years from now.

Senior Nuclear Engineer

Radiant is seeking a highly motivated senior nuclear engineer responsible for developing nuclear engineering solutions for our Kaleidos microreactor. This may include areas such as transportation, fuel handling, criticality safety, reactor physics modeling, and others. You will lead engineering initiatives, provide mentorship and guidance to junior engineers, and drive trade studies, strategic direction, and solutions as priorities shift in a fast-paced startup environment.

Responsibilities & Duties 

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.
- Find and develop suppliers for all components. 
- Own subassembly design, manufacturing, and test schedules.  
Provide expertise and feedback on functional areas such as safety and quality via clear and constructive communication to cross functional teams.

Required Qualifications & Skills

Bachelor’s degree in nuclear engineering or equivalent degree from accredited institution.
5+ years nuclear engineering industry experience.
Experience implementing nuclear regulatory requirements.
Proficient in at least one of the following programming languages: Python, C++, C#, or another scientific computing language.

Desired Qualifications & Skills

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.
Self-motivated with strong organizational, written, and oral communication skills.
Hands-on experience designing hardware and/or performing tests.
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.

Employee Benefits for Eligible Employees:

Stock: Substantial incentive stock plan for all full time, salaried employees.
Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
One Medical: Sponsored memberships for employees and their dependents.
Vision: 100% top tier plan coverage + 50% for dependents.
Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
Voluntary Life, Accident, Hospital, Critical Illness, Commuter and FSA are offered as employee contributed benefits.
Free snacks and drinks onsite.
Flexible PTO policy.

We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.

Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.

6 month growth

1 year growth

2 year growth