HE
Fluids System Design Engineer
Accepting applicationsHadron Energy, Inc. · United States
Full-Time Mid_senior MATLABMentorPythonaiate
Posted
4d ago
Category
Test
Experience
Mid_senior
Country
United States
Company Description
Hadron Energy specializes in Micro Modular Reactor (MMR) development, design, and research based in the San Francisco Bay Area. As a leading MMR developer, Hadron Energy is building factory-produced, transportable microreactors that provide 24/7 carbon-free power for data centers, government facilities, industrial sites, and remote communities. Our mission is to create a brighter, healthier, and more equitable energy future.
Role Description
This is a full-time role for a Senior/Principal Fluids Engineer, based in the San Francisco Bay Area or Remote. The position is ideal for candidates with strong mechanical engineering fundamentals and deep technical expertise in fluid systems and thermal-hydraulic component design who are passionate about advancing safe, scalable nuclear technology.
You will work closely with our cross-functional team to lead the design, sizing, and analysis of fluid systems and rotating/stationary equipment that move and condition the working fluids of Hadron's micro modular reactor. The role focuses on primary and secondary loop fluid mechanics, heat exchangers, pumps, valves, piping networks, and flow-induced loads, ensuring that all hardware meets rigorous nuclear industry codes and standards in a fast-paced startup environment.
Responsibilities
Lead the design and analysis of primary, secondary, and auxiliary fluid systems, including sizing of pumps, valves, heat exchangers, orifices, and piping networks.
Perform single-phase and two-phase flow analyses, hydraulic loss calculations, water-hammer / pressure transient evaluations, and net positive suction head (NPSH) studies.
Develop and execute CFD analyses (STAR-CCM+, ANSYS Fluent / CFX, or OpenFOAM) for component-level flow distribution, mixing, thermal stratification, and heat transfer characterization.
Define thermal-hydraulic boundary conditions and interface loads for mechanical, structural, and safety analysis teams; reconcile system T-H results with component-level CFD.
Design and specify heat exchangers, steam generators, and other heat transfer equipment in coordination with vendors; perform sizing, rating, and performance verification per TEMA / HEI / ASME standards.
Evaluate flow-induced vibration (FIV), acoustic resonance, and erosion-corrosion risks per ASME OM, EPRI guidelines, and applicable industry standards.
Support pressure boundary and component design teams with hydraulic and thermal loads for ASME Section III stress and fatigue evaluations.
Develop and review P&IDs, flow diagrams, system descriptions, and operating procedures for fluid systems.
Perform rigorous peer reviews and contribute to QA documentation per ASME NQA-1 and engineering procedures.
Mentor junior engineers and serve as a technical point of contact for fluid systems and thermal-hydraulic component engineering.
Required Qualifications and Skillsets
Bachelor's, Master's, or PhD in Mechanical Engineering, Nuclear Engineering, Chemical Engineering, or a closely related field.
Minimum 8 years (Senior) / 12+ years (Principal) of relevant experience in fluid systems engineering, thermal-hydraulic component design, or power plant fluid systems.
Strong fundamental understanding of single-phase and two-phase fluid mechanics, convective heat transfer, boiling, and natural circulation.
Demonstrated experience designing and analyzing pumps, valves, heat exchangers, piping networks, and balance-of-plant fluid systems.
Hands-on proficiency with commercial CFD codes (STAR-CCM+, ANSYS Fluent / CFX, COMSOL, or OpenFOAM) and 1-D system codes (Flowmaster, AFT Fathom / Arrow, GOTHIC, or RELAP).
Working knowledge of ASME B31.1 / B31.3, ASME Section III, ASME OM, TEMA, HEI, and applicable NRC SRP / RG guidance for fluid systems.
Experience working under stringent quality assurance programs such as ASME NQA-1, MIL-Q-9858A, or ISO-9000.
Experience evaluating water-hammer, flow-induced vibration, cavitation, and erosion-corrosion in safety-related fluid systems.
Registered Professional Engineer (Mechanical), or ability to obtain active license within 6 months.
Proficiency utilizing Mathcad and Python (or MATLAB) for engineering calculations, automation, and CFD post-processing.
Exceptional technical writing and oral communication skills; ability to clearly translate analytical results into design decisions.
A high degree of integrity, a desire to foster teamwork, and a passion for solving the complex challenges of clean energy.
Show more Show less
Hadron Energy specializes in Micro Modular Reactor (MMR) development, design, and research based in the San Francisco Bay Area. As a leading MMR developer, Hadron Energy is building factory-produced, transportable microreactors that provide 24/7 carbon-free power for data centers, government facilities, industrial sites, and remote communities. Our mission is to create a brighter, healthier, and more equitable energy future.
Role Description
This is a full-time role for a Senior/Principal Fluids Engineer, based in the San Francisco Bay Area or Remote. The position is ideal for candidates with strong mechanical engineering fundamentals and deep technical expertise in fluid systems and thermal-hydraulic component design who are passionate about advancing safe, scalable nuclear technology.
You will work closely with our cross-functional team to lead the design, sizing, and analysis of fluid systems and rotating/stationary equipment that move and condition the working fluids of Hadron's micro modular reactor. The role focuses on primary and secondary loop fluid mechanics, heat exchangers, pumps, valves, piping networks, and flow-induced loads, ensuring that all hardware meets rigorous nuclear industry codes and standards in a fast-paced startup environment.
Responsibilities
Lead the design and analysis of primary, secondary, and auxiliary fluid systems, including sizing of pumps, valves, heat exchangers, orifices, and piping networks.
Perform single-phase and two-phase flow analyses, hydraulic loss calculations, water-hammer / pressure transient evaluations, and net positive suction head (NPSH) studies.
Develop and execute CFD analyses (STAR-CCM+, ANSYS Fluent / CFX, or OpenFOAM) for component-level flow distribution, mixing, thermal stratification, and heat transfer characterization.
Define thermal-hydraulic boundary conditions and interface loads for mechanical, structural, and safety analysis teams; reconcile system T-H results with component-level CFD.
Design and specify heat exchangers, steam generators, and other heat transfer equipment in coordination with vendors; perform sizing, rating, and performance verification per TEMA / HEI / ASME standards.
Evaluate flow-induced vibration (FIV), acoustic resonance, and erosion-corrosion risks per ASME OM, EPRI guidelines, and applicable industry standards.
Support pressure boundary and component design teams with hydraulic and thermal loads for ASME Section III stress and fatigue evaluations.
Develop and review P&IDs, flow diagrams, system descriptions, and operating procedures for fluid systems.
Perform rigorous peer reviews and contribute to QA documentation per ASME NQA-1 and engineering procedures.
Mentor junior engineers and serve as a technical point of contact for fluid systems and thermal-hydraulic component engineering.
Required Qualifications and Skillsets
Bachelor's, Master's, or PhD in Mechanical Engineering, Nuclear Engineering, Chemical Engineering, or a closely related field.
Minimum 8 years (Senior) / 12+ years (Principal) of relevant experience in fluid systems engineering, thermal-hydraulic component design, or power plant fluid systems.
Strong fundamental understanding of single-phase and two-phase fluid mechanics, convective heat transfer, boiling, and natural circulation.
Demonstrated experience designing and analyzing pumps, valves, heat exchangers, piping networks, and balance-of-plant fluid systems.
Hands-on proficiency with commercial CFD codes (STAR-CCM+, ANSYS Fluent / CFX, COMSOL, or OpenFOAM) and 1-D system codes (Flowmaster, AFT Fathom / Arrow, GOTHIC, or RELAP).
Working knowledge of ASME B31.1 / B31.3, ASME Section III, ASME OM, TEMA, HEI, and applicable NRC SRP / RG guidance for fluid systems.
Experience working under stringent quality assurance programs such as ASME NQA-1, MIL-Q-9858A, or ISO-9000.
Experience evaluating water-hammer, flow-induced vibration, cavitation, and erosion-corrosion in safety-related fluid systems.
Registered Professional Engineer (Mechanical), or ability to obtain active license within 6 months.
Proficiency utilizing Mathcad and Python (or MATLAB) for engineering calculations, automation, and CFD post-processing.
Exceptional technical writing and oral communication skills; ability to clearly translate analytical results into design decisions.
A high degree of integrity, a desire to foster teamwork, and a passion for solving the complex challenges of clean energy.
Show more Show less
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