Nuclear Engineer

Radiant

$95K — $115K *
Energy & Utilities
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree in nuclear engineering or equivalent from an accredited institution.
  • 1-2+ years of nuclear engineering industry experience (2 years for MS).
  • Experience with radiation transport methods using codes like MCNP, OpenMC, or Serpent.
  • Proficient in Python, C++, C#, FORTRAN, or another scientific computing language.
  • Basic knowledge of thermal hydraulic principles.
  • Strong organizational, written, and verbal communication skills.
  • Experience developing high-quality work in an engineering organization.

Responsibilities

  • Own the design and analysis of nuclear engineering solutions.
  • Conduct operational dose and shutdown activation analysis as part of shielding responsibilities.
  • Perform criticality safety and verification of nuclear models and tools.
  • Analyze radiological dose consequences for different accident scenarios.
  • Run coupled neutronics and thermal calculations for reactor dynamics.
  • Collect requirements and communicate feedback to cross-functional teams.
  • Address additional nuclear design and analysis tasks as assigned.

Benefits

  • Substantial incentive stock plan for all full-time employees.
  • 100% medical coverage for employee up to base silver plan; 50% for dependents.
  • Sponsored One Medical memberships for employees and dependents.
  • 100% coverage of top-tier vision plan; 50% for dependents.
  • Comprehensive dental coverage, including orthodontia for dependents.
  • Employee-contributed voluntary benefits (life, accident, hospital, etc.).
  • 8 weeks of paid parental leave for all parents, extra for CA employees.
  • Daily catered lunch and free snacks/drinks provided.
  • Flexible PTO policy and remote workday allocation available.
  • Company bonding events and activities foster camaraderie.
  • Work in headquarters located near the Pacific Ocean.
Full Job Description
About the Role

Radiant is seeking a highly motivated Nuclear Engineer responsible for developing nuclear engineering solutions for our Kaleidos microreactor. This may include nuclear engineering areas such as radiation shielding, criticality safety, accident dose consequence, reactor physics modeling and design, transient analysis, and radiation detection. You will lead and own nuclear engineering initiatives and studies, strategic direction, and work closely with a collaborative nuclear and engineering team in a fast-paced startup environment. The ideal candidate is passionate about advanced reactor design, detail-oriented, effectively communicates, and a tenacity to solve interesting technical challenges.

Responsibilities & Duties :
  • Ownership of Nuclear design and analysis, examples include:
    • Shielding: Operational dose and shutdown activation analysis, waste categorization, and alignment of shielding design to customer and regulatory requirements.
    • Neutronics: Analysis of ex-vessel reactor fluxes and energy deposition, criticality safety, and verification and validation (V&V) of the nuclear toolbox and reactor models.
    • Accident and Dose Consequence: Radiological dose consequence from different accident scenarios for the Kaleidos demonstration and production units.
    • Transient Analysis: Run coupled neutronics and thermal calculations to further understanding of the reactor dynamics of the Kaleidos reactor design.
  • Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication.
  • Other nuclear design and analysis duties as assigned.

Required Qualifications & Skills:
  • Bachelor's degree in nuclear engineering or equivalent degree from an accredited institution.
  • 1-2+ years of nuclear engineering industry experience (MS equivalent to 2 yrs).
  • Experience with radiation transport methods, including with codes such as MCNP/OpenMC/Serpent.
  • Proficient in at least one of the following programming languages: Python, C++, C#, FORTRAN, or another scientific computing language.
  • Basic knowledge of thermal hydraulic principles.
  • Self-motivated with strong organizational, written, and oral communication skills.
  • Experience working in an engineering organization and developing high-quality work.

Desired Qualifications & Skills
  • Experience with variance reduction techniques and associated software (Attila4MC and/or ADVANTG), is a plus.
  • Strong experience with OpenMC, Serpent, MCNP, Attila4MC, MOOSE, RELAP, Pronghorn, GRIFFIN, or other similar nuclear software packages.
  • Competency in distributed software development processes and high-performance computing environments.
  • Familiarity with CAD design software (NX, SolidWorks, and/or SpaceClaim), is a plus.
  • Familiarity with dose consequence methods and software such as MAACS or NRC-RADTRAN.
  • At least 1 year of software development or scripting experience.
  • Hands-on experience designing hardware and/or performing tests.

Additional Requirements:
  • Must be willing to work extended hours and weekends as necessary to accomplish our mission.
  • Must work 100% onsite at El Segundo HQ.


Benefits and Perks
  • Stock: Substantial incentive stock plan for all full-time 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/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.


Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant's new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.

The best of today's advanced reactor builders don't wait for job postings. They join the winning team. If that's you, contact us directly for immediate opportunities: [email protected].

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