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Thermal-Hydraulics Code Developer 5

NuScale Power

$136,742 - $213,878
Sep 20, 2025
Remote, US
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NuScale Power, LLC is looking to develop cutting edge, proprietary reactor safety software that supports the design certification and commercialization of the NuScale SMR. This role will also involve leading and mentoring junior staff in all areas of code development and thermal-hydraulics.

Requirements

  • Demonstrated experience in thermal-hydraulic analyses including transient safety analysis required.
  • Experience with industry-standard simulation tools such as RELAP5, RETRAN, COBRA, VIPRE required.
  • Proficiency in Fortran and Python computer languages.
  • Demonstrated ability to learn new advanced topics not previously familiar with required.
  • Experience/familiarity with complex coupled multi-physics simulation tools preferred (i.e., VERA, MOOSE, RELAP5 Executive).
  • Previous code development and code validation experience required.
  • Previous experience in coupling of subchannel, neutronics, and system thermal-hydraulics codes preferred.

Responsibilities

  • Supports both Engineering and Office of Technology departments in evaluating and developing state-of-the-art simulation tools for reactor safety analysis.
  • Knows and masters the RELAP5-based thermal-hydraulic code structure, numerical solution method, models, and correlations as well as their ranges of applicability.
  • Exercises in-depth knowledge and experience to develop and achieve software development objectives and goals in creative and effective ways.
  • Advises in areas of code coupling and commercial impact of advanced tool development.
  • Advises on best path forward for implementing code changes and strategies necessary to meet new objectives or requirements, and applies knowledge of industry best-practices and state-of-the-art tools and methods.
  • Develops new models and code enhancements for proprietary reactor safety software with minimal supervision.
  • Prepares code input for verification purposes and executes code testing activities as necessary.

Other

  • The Thermal-Hydraulic Code Developer is responsible for leading and mentoring junior staff in all areas of code development and thermal-hydraulics.
  • Develops understanding of stakeholder needs and strategic priorities to lead cooperative efforts among members of project teams with responsibility for results.
  • Willingness to learn new coding standards and languages.
  • Provides engineering oversight to staff while acting as lead in the direction and supervision of work, as needed.
  • Mentors and trains less experienced engineers.