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Job Description

Role-Nuclear Methods Software Engineer

Onsite in Bellevue, WA


1) Background with neutronics theory and principles, as demonstrated with a degree in nuclear engineering or similar

2) Demonstrated experience with computational neutronics tools, such as MCNP, DIF3D, Serpent, MOOSE, etc.

3) Proficiency with a computational programming language (i.e. Python, Fortran, C++, etc.) and computational development tools (i.e. version control, CI, etc.)

  • Create formal documentation of nuclear methods software requirements, design, implementation, and testing in support of licensing TerraPower reactors.
  • Update, improve, and/or create software to satisfy all licensing requirements during the Validation and Verification (V&V) process
  • Incorporate additional 3rd-party programs in our simulation ecosystem as necessary to support licensing
  • Design and execute sensitivity studies to understand the effects and validity of various modeling assumptions, including meshing, physics coupling, transport options, cross section preparation, fission product models, spatial kinetics, etc., and adjust methods as necessary
  • Train and support reactor designers and developers in the use of the design software suite
  • Build and apply methods to assess the propagation of uncertainty and their effect on safety margins
  • Enhance engineering team's ability to build models and make meaningful conclusions from simulation output through input tools, visualization, reports, etc.,

Key Qualifications and Skills 

  • Advanced degree in Nuclear Engineering or equivalent and 4+ years of relevant experience preferred
  • Fast reactor physics and design intuition
  • Experience in understanding and executing nuclear design/analysis methodologies, including criticality, flux/power distributions, fuel management optimization, reactivity coefficients, shielding, activation, control rod worth, detector response, and uncertainty analysis, ideally with a focus on fast-neutron reactors
  • Excellent “under-the-hood” knowledge of the methods of reactor physics analysis (deterministic and stochastic particle transport, isotopic depletion, perturbation theory, nuclear data, kinetics, etc.)
  • Experience with some nuclear engineering software such as DIF3D, MC2, PARTISN, MCNP, Serpent, SCALE, PARCS, APA, CASMO, DRAGON, ARMI, etc. preferred
  • Strong computational expertise required: we consider computers to be the universe at our fingertips rather than burdensome necessities
  • Strong programming skills in any language required, preferably in scientific computing, Python, C++, and Fortran skills are a bonus
  • Proven ability to integrate and automate simulation tools
  • Demonstrable capabilities with fundamental software development tools (e.g. IDEs, version control, profilers, debuggers, documentation builders, packaging tools)
  • Experience interacting on nuclear methodology with the NRC under an ASME NQA-1 compliant QA environment preferred
  • Good working knowledge of general numerical methods and applied mathematics (e.g. PDEs, numerical stability, statistics, numerical analysis, dynamics)
  • Strong formal technical documentation skills required
  • Ability to consistently deliver to an aggressive schedule
  • Self-motivated: able to seek out tasks and produce value aligned with team goals without waiting for next assignment
  • Passion for and dedication to software best practices
  • Willingness to openly give and accept professional criticism through code reviews and other venues
  • Strong verbal communication skills desired
  • The successful candidate will possess a high degree of trust and integrity, communicate openly and display respect, and a desire to foster teamwork