Safety Analysis Engineer

Hadron Energy, Inc. specializes in Micro Modular Reactor (MMR) development and is seeking a Senior/Principal Safety Analysis Engineer. This role involves leading the development and execution of deterministic safety analyses for microreactors, focusing on ensuring compliance with safety requirements through advanced reactor safety analysis techniques.

Responsibilities:

• Develop, maintain, and execute RELAP5 / RELAP5-3D (and similar) plant models for steady-state, transient, and design basis accident (DBA) analyses of the Hadron MMR
• Perform Chapter 15 transient and accident analyses, including loss of flow, loss of heat sink, reactivity insertion, loss of coolant, anticipated transients without scram (ATWS), and station blackout
• Develop nodalization, model qualification, sensitivity, and uncertainty analyses consistent with RG 1.203 (EMDAP) and applicable code assessment practices
• Define and document safety analysis acceptance criteria, success paths, and the licensing basis event (LBE) set in coordination with the PRA and licensing teams
• Author FSAR Chapter 15 sections, technical specifications bases, and supporting topical reports; defend analyses during NRC pre-application and licensing interactions
• Develop input decks, control logic, and trip/setpoint models reflecting plant protection system, ECCS, and engineered safety feature behavior
• Interface with neutronics, fuel, fluids, mechanical, and I&C teams to integrate boundary conditions and confirm consistency of plant response
• Perform code-to-code benchmarking and validation against separate-effects and integral-effects test data; support development and qualification of evaluation models
• Provide technical guidance to junior engineers and lead reviews of safety analysis calculations, models, and reports
• Act as a technical point of contact for thermal-hydraulic safety analysis, supporting cross-functional design decisions and licensing strategy

Requirements:

• Bachelor's, Master's, or PhD in Nuclear Engineering, Mechanical Engineering, or a closely related field
• Minimum 8 years (Senior) / 12+ years (Principal) of experience in nuclear safety analysis, thermal-hydraulics, and transient/accident analysis
• Hands-on, production-level proficiency with RELAP5 / RELAP5-3D, including model development, nodalization, and execution of DBA analyses
• Strong fundamental understanding of two-phase flow, critical heat flux, natural circulation, reactor kinetics, and reactor systems behavior
• Demonstrated experience authoring Chapter 15 / FSAR safety analysis content and supporting NRC licensing under 10 CFR Part 50, Part 52, or Part 53
• Familiarity with Regulatory Guide 1.203 (EMDAP), 10 CFR 50.46, Appendix K, and the Licensing Modernization Project (LMP) / NEI 18-04 approach for non-LWRs
• Experience with code assessment, validation, and uncertainty quantification (BEPU / CSAU) methodologies
• Experience working under stringent quality assurance programs such as ASME NQA-1
• Proficiency utilizing Python, MATLAB, and/or Fortran for input deck automation, post-processing, and uncertainty studies
• Exceptional technical writing and oral communication skills; ability to clearly defend complex technical conclusions to internal and external reviewers
• A high degree of integrity, a desire to foster teamwork, and a passion for solving the complex challenges of clean energy
• Experience with TRACE, RETRAN, MELCOR, MAAP, SCDAP, or GOTHIC is a strong plus
• Experience with advanced reactor or non-LWR safety analysis (e.g., SMRs, HTGRs, MSRs, sodium fast reactors) is a major plus