Position: Nuclear Engineer (Neutronics Specialist)
Location: Waterloo, Ontario (On site, five days per week)
You will work on neutron transport simulations, core physics modeling, reactivity and kinetics evaluations, fuel cycle and burnup analysis, multiphysics coupling with thermal hydraulics and structural teams, benchmark and validation work, and nuclear data processing. You will collaborate closely with engineering, safety, and program teams to produce defensible and auditable reactor physics outputs suitable for a regulated environment.
Key Responsibilities
Neutronics and Reactor Physics
• Perform neutron transport and reactor physics simulations using Serpent2, OpenMC, MCNP, SCALE, DRAGON, MOOSE based solvers, or other neutronics and nodal diffusion codes
• Build and maintain high fidelity core, lattice, reflector, and shielding models for microreactor concepts
• Conduct reactivity coefficient evaluations, power distribution studies, burnup and depletion analysis, kinetics assessments, and control system behavior studies
• Support core design optimization, fuel selection, reflector and shielding design, and neutronic performance trade studies
Multiphysics and Safety Integration
• Work with thermal hydraulics engineers on coupled neutronics and thermal hydraulics analysis
• Provide neutronics inputs for safety analysis, transient behavior, and extreme environment performance assessments
Nuclear Data and Verification
• Process and interpret nuclear data libraries including ENDF B, JEFF, and JENDL
• Perform sensitivity and uncertainty analysis using tools such as SCALE SAM or TSUNAMI
• Conduct benchmark comparisons including ICSBF, Serpent benchmarks, MCNP benchmarks, and critical experiments
Documentation and Communication
• Prepare technical reports, calculation packages, and design documentation suitable for regulated and auditable environments
• Present findings in internal design reviews and to external stakeholders
Qualifications
Required
• Bachelor's, Master's, or PhD in Nuclear Engineering, Engineering Physics, Reactor Physics, or a related field
• At least two years of relevant experience in industry, research, or graduate level work
• Demonstrated experience with at least one major neutronics code including OpenMC, Serpent2, MCNP, SCALE, DRAGON, the MOOSE suite, or other named neutronics and nodal diffusion codes
• Strong programming and automation skills in Python, MATLAB, or similar tools
• Solid understanding of reactor physics fundamentals including cross sections, transport theory, diffusion theory, burnup, kinetics, and reactivity feedback
• Ability to produce clear and defensible technical documentation
Nice to Have
• Experience with microreactors, space reactors, or fast spectrum systems
• Experience with multiphysics coupling such as OpenMC MOOSE or Serpent CFD workflows
• Familiarity with nuclear safety analysis, extreme environment reactor design, or shielding analysis
• Experience with high performance computing environments
• Knowledge of CSA N286 or N299, NQA 1, or other regulated quality frameworks
