Core Thermal Hydraulics Software Developer

2 weeks ago

Seattle, Washington, United States System One Full time

System One is seeking a skilled Core Thermal Hydraulics Software Developer to support the software development for the reactor core of the sodium-cooled Natrium Reactor program.

Reporting to the Manager of Thermal Hydraulics for Core Design and Methods, you will advance thermal-hydraulics software for analyzing the behavior of advanced energy systems under various operating conditions.


Key Responsibilities:

  • Develop, test, and verify computational software to model and analyze core thermal hydraulics for the Natrium demonstration reactor.
  • Collaborate with interdisciplinary software development teams, actively participating in all stages of the software development lifecycle, including integration into the software quality assurance (SQA) program.
  • Work closely with QA teams to ensure that translated code meets required quality standards and acceptance criteria.
  • Participate in code reviews, providing feedback to enhance code quality, maintainability, and validation traceability.
  • Prepare reports and presentations to document findings, make recommendations, and communicate progress to core thermal hydraulics team managers and leads.


Qualifications and Skills:

  • B.S., M.S., or Ph.D. in Mechanical, Nuclear, Computer Science, or a related technical engineering field from an accredited university.
  • A minimum of 5+ years of industry experience (nuclear or related) with a B.S. degree, or 3+ years with an M.S. or Ph.D., demonstrating expertise in software development and nuclear reactor core thermal-hydraulic analysis.
  • Proficiency in Python programming and experience with Git or similar version control systems; preference for candidates also proficient in C++.
  • Experience with Software Quality Assurance (SQA) programs and familiarity with Nuclear Quality Assurance (NQA-1) standards is highly preferred.
  • Excellent verbal and written communication skills, essential for working within an NQA-1 environment and for formally documenting calculations.
  • Experience with nuclear reactor subchannel or systems codes (e.g., RELAP5-3D, TRACE, COBRA, SLTHEN, SABRE4) is preferred.
  • Knowledge of liquid metal thermal-hydraulics is a plus.
  • Strong integrity, open communication, and the ability to work collaboratively within a team-focused environment.

This is an exciting opportunity to contribute to cutting-edge nuclear reactor technology and be part of a dynamic and collaborative team.

Remote working/work at home options are available for this role.

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