Nuclear Safety Analysis Engineer

Terrestrial Energy Inc.; Bryan (TX); Hybrid; USD 80,000 - 100,000; Full time

Benefits offered by this job

Extended Healthcare Plan

Wellness Subsidy

Paid Volunteer Days

Job summary

A leading nuclear technology firm is seeking a Safety Analysis Engineer to perform vital safety analyses supporting the development of advanced reactor technology. This role requires expertise in safety analysis methodologies, strong technical and analytical skills, and collaboration across multiple disciplines. The position begins remotely with an expected transition to on-site responsibilities in Bryan, Texas, by February 2026. Candidates must demonstrate a deep understanding of nuclear safety principles and regulatory compliance.

Qualifications

• M.Sc. or Ph.D. in Nuclear Engineering, Mechanical Engineering, or related field.
• Minimum 3 years of experience in nuclear safety analysis.
• Proficiency with thermal-hydraulic analysis codes.

Responsibilities

• Perform deterministic and probabilistic safety analyses for IMSR design.
• Prepare safety analysis chapters for licensing documentation.
• Evaluate plant response to postulated initiating events.

Skills

Thermal-hydraulic analysis

Technical writing

Analytical problem-solving

Collaboration

Attention to detail

Education

M.Sc. or Ph.D. in Nuclear Engineering or related field

B.Sc./B.Eng. with 5 years of nuclear safety analysis experience

Tools

Flownex

MATLAB

Python

MCNP

Job description

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.

Terrestrial Energy Overview

Terrestrial Energy is a US developer of advanced, Generation‑IV nuclear reactors. We are expanding our workforce to develop and deploy our Integral Molten Salt Reactor (IMSR) small modular nuclear plant, delivering cost‑competitive, clean firm heat and power to industry sectors.

The Company has recently completed a merger, creating a publicly listed operating company (NASDAQ IMSR)möglichkeiten to secure the capital resources for our next growth phase. With 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 a unique opportunity to participate in the company’s growth business plan.

We are building a team of high‑performing business professionals and leaders in engineering, R&D, product management, and business development. We are looking for talented individuals who can help build the organization, processes, and goal‑oriented corporate culture to lead the company in our expansion.

Candidate Expectations

• 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 contribute 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.

Safety Analysis Engineer

The Safety Analysis Engineer, under the direction of the Safety Manager, is critical to demonstrating the safety characteristics of Terrestrial Energy’s IMSR technology and supporting regulatory licensing activities. The successful candidate is primarily responsible for performing comprehensive safety analyses, developing accident scenarios, and contributing to safety case documentation that demonstrates compliance with regulatory requirements and the inherent safety features of our advanced reactor design.

Other Responsibilities Include

Safety Analysis

• 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.
• അഭ 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.

Regulatory Support

• Prepare safety analysis chapters for licensing documentation including Preliminary Safety Analysis Report (PSAR) and Final Safety Analysis Report (FSAR) for NRC and CNSC licensing.
• Develop DOE‑required safety analyses including Preliminary Documented Safety Analysis (PDSA) and Documented Safety Analysis (DSA) in accordance with DOE‑hawk‑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.

Collaboration

• 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.

Requirements

Education

• 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.

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.

Technical Skills

• Proficiency with thermal‑hydraulic analysis codes (Flownex, REPLAP5, or similar).
• Knowledge bygge 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.

Professional Skills

• 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.

Assets

• 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 disposer 10 CFR 830).
• Experience with severe accident analysis codes (MELCOR, MAAP, or similar).
• Background in probabilistic risk assessment 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,leicht10 CFR 50 Appendix B).
• Professional Engineer (P.Eng./P.E.) designation.
• Publications in nuclear safety or reactor analysis.

Benefits

• Extended Healthcare Plan (Medical, Disability, Dental & Vision), plus 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.
• Annual Performance Review.
• 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 the successful candidate to be able to access and use information subject to U.S. Export Control Laws, which mandate that all citizenships be from the U.S. Department of Energy’s List of Generally Authorized Countries (10 CFR Part 810 Appendix A). If a specific authorization from the U.S. Department of Energy is obtained or if you are a U.S. citizen, U.S. national, U.S. permanent resident, or protected individual under the U.S. Immigration and förnenization Act, no additional restrictions apply. Additional information can be found at https://www.ecfr.gov/current/title-10/chapter-ziemy- part-810/appendix-A to 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 you낌, please contact [e-mail].