Nuclear Safety Analysis Engineer at Terrestrial Energy — Remote, USA | Base Career

Interested in helping us transform thermal and electric energy?

Become a part of the leading Generation-IV nuclear plant development team.

This position is remote until the office opens in or around Bryan, TX on or before February 2026, after which time it will be a 100% on site role.

Come join us at Terrestrial Energy, a US developer of advanced, Generation IV nuclear reactors.

We are growing our workforce to develop and deploy our Integral Molten Salt Reactor (IMSR) small modular nuclear plant to provide cost-competitive, clean firm heat and power to industry.

The Company has recently completed a merger creating a publicly listed operating company (NASDAQ “IMSR”), to secure the capital resources for our next growth phase.

With the current alignment of US Federal and State government, as well as industry interest in Small Modular Reactor (SMR) and advanced reactor technologies such as Terrestrial Energy’s IMSR, there is today a unique and compelling opportunity to participate in the execution of the company’s growth business plan.

The Company is building a team of high-performing business professionals and leaders in engineering, R&D, product management and business development areas at our Charlotte, North Carolina headquarters and future project sites.

We are looking for talented individuals who can help build the organization, processes, and goal-orientated corporate culture to lead the company in our expansion.

We are seeking people who:

Have US market experience and perspectives bringing good judgement and innovative approaches to problem solving and business plan execution.
Have demonstrated exceptional performance in past engineering projects.
Offer exceptional leadership and team building capabilities.
Have a deep understanding of the requirements for advanced reactor development.
Can assist in the creation of the discipline and organized company structure, and contributed to a culture of excellence, necessary for the development and deployment of the Company’s IMSR plant.
Can thrive in a fast growing and opportunity business environment, and are capable of flexibility and adaptability at a time of organizational change.
Have the specific skillset and experience for the following role:

The Safety Analysis Engineer , under the direction of Safety Manager, is critical to demonstrating the safety characteristics of Terrestrial Energy’s IMSR technology and supporting regulatory licensing activities.

Perform deterministic and probabilistic safety analyses for the IMSR design
Develop and analyze Design Basis Accidents (DBAs) and Beyond Design Basis Accidents (BDBAs)
Conduct transient and accident analysis using thermal-hydraulic and neutronics codes
Evaluate plant response to Postulated Initiating Events
Assess the performance of Safety Systems and engineered safety features
Analyze dose consequences and radiological release scenarios
Perform sensitivity and uncertainty analyses

Modeling and Simulation

Develop and validate computer models for safety analysis using industry-standard codes
Build thermal-hydraulic models of reactor systems and components
Perform single and coupled physics simulations
Validate models against experimental data and benchmarks
Document modeling assumptions, methodologies, and results

Prepare safety analysis chapters for licensing documentation including Preliminary Safety Analysis Report (PSAR) and Final Safety Analysis Report (FSAR) for NRC/CNSC licensing
Develop DOE-required safety analyses including Preliminary Documented Safety Analysis (PDSA) and Documented Safety Analysis (DSA) in accordance with DOE-STD-3009
Highlight key safety decisions including target performance of structures, systems, and components (SSCs), safety system responses to normal and off-normal operations, and facility security considerations
Define classification rules and terminology for safety SSCs, including application of the hierarchy of controls and Defense in Depth principles to ensure safety
Perform analysis of most limiting potential dose consequences (e.g., unmitigated or Maximum Hypothetical Accident scenarios) to support Natural Phenomena Hazard (NPH) Natural Design Category (NDC) categorization
Support validity assessment of selected safety document format and content, applicability of SSC classifications, and other graded approaches
Support regulatory review processes and respond to technical questions from regulatory bodies (CNSC, NRC, DOE)
Ensure analyses comply with applicable regulatory requirements and guidance
Participate in regulatory meetings and technical discussions
Support development of technical specifications and operational limits

Documentation and Reporting

Prepare detailed technical reports documenting analysis methodologies, assumptions, and results
Create clear visualizations and presentations of analysis results
Maintain comprehensive documentation of safety analysis activities
Contribute to technical publications and conference papers
Develop and maintain analysis procedures and quality assurance documentation

Work closely with Physics, Thermal-Hydraulics, Systems Engineering, and Design Teams
Interface with external partners including national laboratories and consultants
Participate in design reviews and technical meetings
Support integrated safety assessments across multiple disciplines
Contribute to continuous improvement of safety analysis methods

M.Sc. or Ph.D. in Nuclear Engineering, Mechanical Engineering, Chemical Engineering, or related field; OR
B.Sc./B.Eng. with minimum 5 years of relevant nuclear safety analysis experience

Minimum 3 years of experience in nuclear safety analysis or related field
Experience with safety analysis codes and methodologies
Knowledge of nuclear reactor safety principles and accident phenomena
Understanding of regulatory requirements for nuclear facilities
Experience with deterministic safety analysis

Proficiency with thermal-hydraulic analysis codes (Flownex, REPLAP5, or similar)
Knowledge of neutronics codes (MCNP, SCALE, Serpent, or similar)
Understanding of severe accident phenomena and analysis methods
Familiarity with probabilistic risk assessment (PRA) concepts
Strong analytical and problem-solving skills
Proficiency with technical computing tools (MATLAB, Python, or similar)
Experience with data analysis and visualization

Excellent technical writing and documentation skills
Strong attention to detail and commitment to quality
Ability to work independently and as part of a team
Effective communication skills for technical and non-technical audiences
Project management and time management capabilities
Critical thinking and ability to defend technical positions

Experience with advanced reactor designs or Generation IV systems
Familiarity with molten salt reactor technology and safety characteristics
Experience with US NRC, US DOE, or Canadian CNSC licensing processes
Knowledge of relevant regulatory guides and industry standards (NUREG, CSA, IAEA, DOE STD-1189, DOE-STD-3009, 10 CFR 830)
Experience with severe accident analysis codes (MELCOR, MAAP, or similar)
Background in probabilistic risk assessment (PRA) or probabilistic safety assessment (PSA)
Experience with uncertainty quantification methods
Knowledge of source term analysis and radiological consequence modeling
Familiarity with quality assurance requirements for nuclear analysis (CSA N286.7, 10 CFR 50 Appendix B)
Professional Engineer (P.Eng./P.E.) designation
Publications in nuclear safety or reactor analysis

Extended Healthcare Plan (Medical, Disability, Dental & Vision), + an additional Health Spending Account
A vacation policy designed to support your work-life balance
EAP Programs available to you and your family
Wellness Subsidy

Paid United Way Volunteer Days – A chance to give back!

Please submit a Resume and Cover Letter.

Candidates must be legally authorized to work in the US without the need for sponsorship for employment visa status.

Terrestrial Energy requires that the successful candidate be able to access and use information subject to U.S.

Export Control Laws, which mandate all citizenships (including dual citizenships) be from the U.S.

of Energy’s List of Generally Authorized Countries (10 CFR Part 810 Appendix A and can be found here: https://www.ecfr.gov/current/title-10/chapter-III/part-810/appendix-Appendix%20A%20to%20Part%20810 ) unless a specific authorization from the U.S.

of Energy is obtained or unless you are a U.S. citizen, U.S. national, U.S. permanent resident, or protected individual under the U.S.

Immigration and Naturalization Act (8 U.S.C. 1324b(a)(3)).

Additional information can be found here: https:/ /www.energy.gov/nnsa/10-cfr-part-810 .

Terrestrial Energy Inc. is an equal opportunity employer and does not discriminate on the basis of any legally protected status or group.

We encourage applications from all qualified individuals.

If you require accommodation during the application or interview process, please advise us as soon as possible so appropriate arrangements can be made.

If you require technical support in a format that is accessible to you, please contact Accessibility@terrestrialenergy.com

Nuclear Safety Analysis Engineer

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