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Job Opening: Physics and Thermal-Hydraulic R&D Scientist

Company Brief

Terrestrial Energy is a developer of Generation IV advanced nuclear power plants that use its proprietary Integral Molten Salt Reactor (IMSR®) technology.  IMSR® technology represents true innovation in cost reduction, versatility and functionality of nuclear power plants.  IMSR® power plants will provide zero-carbon, reliable, dispatchable, cost-competitive electric power and high-grade industrial heat for use in many industrial applications, such as chemical synthesis and desalination, and in so doing extend the application of nuclear energy far beyond electric power markets.  We have the potential to make important contributions to industrial competitiveness, energy security, and economic growth.  Our deployment will support rapid global decarbonization of the primary energy system by displacing fossil fuel combustion across a broad spectrum.  Using an innovative design, and proven and demonstrated molten salt reactor technology, we are engaged with regulators and industrial partners to complete IMSR® engineering and to commission first IMSR® power plants in the late 2020s.  To execute this plan, we are now looking to add talented people to the team, each of whom will:

  • improve our team by adding diverse perspectives and innovative ways of problem solving
  • have demonstrated exceptional results in engineering projects
  • be a team player with the ability to collaborate closely and interact with other groups
  • be flexible and adaptable to change
  • have skillset and experience that relate to the following role:


Thermal Hydraulics and Physics R&D Test Designer

Reports To

R&D Program Manager

Job Duties

The Thermal Hydraulics and Physics R&D Test Designer, under the direction of the R&D Program Manager, is primarily responsible for obtaining the scope of test from the Physics and Therma Hydraulics Engineers and use it in the design of physics and thermal hydraulic tests aimed to validate and verify assumptions and computational data.  Other responsibilities include:

  • Develop physics and thermal hydraulic models to aid in the test design
  • Perform simulations and sensitivity analyses and optimization studies to improve designs
  • Participate in selection of suppliers
  • Development of the test details and technical specifications
  • Review and contribute to the development of the test procedures, test plans and test reports
  • Be familiar with the calibration of instruments and analysis of the calibration data
  • Present the test designs to the higher management to support decision making
  • Analyse the test results and suggest a path forward
  • Coordinate with the engineering disciplines such as physics, thermal hydraulics, materials and chemistry
  • Contribute in the design development of the IMSR® technology
  • Review engineering assessment documents and provide comments

Core Competencies

  • Thermodynamics and Heat Transfer
  • Fluid Dynamics
  • Neutronics
  • Power plant engineering
  • Simulation experience
  • Communication
  • Critical Thinking
  • Decision Making
  • Problem Solving
  • Results Orientation
  • Team player with the ability to collaborate and interact with other groups
  • Flexible and adaptable to change


  • Minimum undergraduate degree in nuclear engineering or science degree
  • Minimum 4 to 5 years of work experience preferable in power industry, and focus in thermal hydraulic design and analysis
  • Working knowledge of system level physics and thermal hydraulic codes
  • Working knowledge of any programming language such as C#, C++ or Python
  • Extensive knowledge of thermodynamics and heat transfer fundamentals
  • Extensive knowledge of nuclear physics fundamentals
  • Knowledgeable in the working principles of neutron sources
  • Knowledgeable in the working principles of pumps and heat exchangers
  • Skills and ability to learn new technology
  • Strong problem identification and problem resolution skills
  • Flexibility to adjust to shifting priorities and deadlines
  • Exceptional interpersonal and communication (both written and verbal) skills
  • Skilled at developing and maintaining strong relationships across all levels of the organization and with external customers and vendors


  • Education in the nuclear field
  • Registered as P.Eng. in Professional Engineers Ontario
  • Design / refurbishment experience of nuclear reactors
  • Knowledge of molten salt nuclear reactor working principles

TEI values diversity in its workforce and encourages applications from all qualified individuals. TEI is an Equal Opportunity Employer – Minority / Female / Disability / Gender Identity / Sexual Orientation / Age


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Learn More About Terrestrial Energy

Terrestrial Energy is an industry-leading technology company committed to delivering reliable, emission-free, and cost-competitive nuclear energy with a truly innovative advanced reactor design, the Integral Molten Salt Reactor (IMSR®).