What are the responsibilities and job description for the SMR Core Physics & Neutronics Engineer position at Stealth Communications?
Stealth Communications seeks to fill multiple positions for the role of : SMR Core Physics & Neutronics Engineer to lead the advanced modeling, simulation, and optimization of our Small Modular Reactor (SMR) cores.
This role is pivotal in driving reactor physics innovation, ensuring core design efficiency, safety, and regulatory compliance. You should have deep expertise in neutron transport, fuel cycle analysis, reactivity control,, and advanced computational methods for reactor physics simulations.
This position is based onsite in Honolulu, HI , with occasional travel as required. Security clearance is required .
Responsibilities
- Develop, validate and optimize neutron transport models for steady-state and transient core behavior, ensuring compliance with safety, regulatory, and performance requirements.
- Perform high-fidelity neutronics modeling using Monte Carlo, deterministic, and hybrid methods with tools such as MCNP, SCALE, SERPENT, CASMO, MPACT, OpenMC and ATTILA.
- Conduct full-core depletion calculations for fuel cycle optimization, burnup credit analysis and isotopic inventory tracking.
- Perform reactivity feedback analysis, including Doppler broadening, moderator temperature coefficient, fuel temperature coefficient, and xenon / samarium poisoning effects.
- Lead core design parameter studies, optimizing core configurations, power distribution and neutron flux shaping for longer fuel cycles and enhanced power peaking management.
- Develop high-fidelity multi-physics coupling between neutronics and thermal-hydraulics codes (e.g., RELAP5, TRACE, CTF, or Subchannel codes) for integrated safety and performance assessments.
- Conduct control rod worth calculations, shutdown margin evaluations and transient reactivity insertion event modeling.
- Support nuclear safety case development, including subcriticality analysis, probabilistic risk assessment and shielding effectiveness verification.
- Perform gamma and neutron transport analysis for radiation shielding optimization, activation product predictions, and radiation damage assessment.
- Lead the development of next-generation core physics simulation frameworks, integrating AI / ML-based predictive modeling and uncertainty quantification methods.
- Develop neutronics benchmarks and validate computational models against experimental reactor data, including from critical assemblies and test reactors.
- Collaborate with regulatory specialists, technical submittals, and compliance with DOE and international nuclear safety standards.
- Contribute to research on advanced fuel cycles, including HALEU, TRISO fuel, molten salt reactors (MSRs), fast reactors and hybrid nuclear-renewable integration.
- Provide technical leadership in computational neutronics, guiding cross-functional teams in core performance assessments, fuel management strategies and reactor design trade-off studies.
- Prepare technical reports, regulatory justification and R&D whitepapers for internal stakeholders, and partners.
Qualifications
Starting Salary : $425,000 with sign-on bonus of $500,000 relocation expenses
Salary : $425,000
