Plant Engineer

Overview

Design and integrate Balance of Plant systems for micro-modular nuclear reactors

Key Responsibilities

• bop design
• p&id development
• thermal modeling
• trade studies
• safety assessment
• vendor coordination

Tasks

You will play a critical role in developing Hadron’s next-generation micro modular reactor platform—translating conceptual designs into detailed engineering systems and ensuring seamless mechanical and thermal integration across all subsystems in a fast-paced, mission-driven environment. The Balance of Plant Engineer will lead the design, analysis, and integration of all systems external to Hadron’s microreactor core—including heat exchangers, power conversion systems, cooling loops, structural interfaces, and auxiliary systems. This individual will collaborate closely with reactor, thermal-hydraulic, electrical, and controls engineers to ensure the overall plant design meets performance, safety, and manufacturability requirements. -Support component specification, material selection, and vendor coordination for critical BOP subsystems (heat exchangers, pumps, valves, condensers, piping, etc.) -Develop P&IDs, system flow diagrams, and interface control documents to define plant configuration and system boundaries -Conduct trade studies on system configurations, materials, and technologies to maximize efficiency, maintainability, and scalability -Lead the design and development of Balance of Plant systems, including primary and secondary heat transport, power conversion, and auxiliary systems -Collaborate with nuclear, mechanical, and structural engineers to ensure seamless integration between the reactor module and external systems -Contribute to system safety assessments and design reviews in accordance with NRC and ASME standards -Document system requirements, analyses, and results to support design certification and licensing submittals -Perform system-level modeling, thermal-hydraulic analyses, and flow simulations to optimize performance and safety margins -Support prototype development, testing, and commissioning activities as the design matures -Collaborate with manufacturing and procurement teams to ensure BOP systems are compatible with modular, factory-built assembly

Requirements

• relap5
• matlab
• ansys
• asme
• phd
• 5+ years

What You Bring

This is a full-time on-site role for a Balance of Plant (BOP) Engineer, based in the San Francisco Bay Area. The position is ideal for candidates with strong mechanical or systems engineering experience who are passionate about designing and integrating the supporting systems that enable reliable and scalable nuclear power generation. -Strong proficiency with thermal-hydraulic modeling and simulation tools (e.g., RELAP5, MATLAB, Modelica, ANSYS Fluent, COMSOL) -Knowledge of heat exchangers, pumps, valves, piping design, and pressure boundary components -Experience with system integration, interface control, and mechanical design for power or process plants -Bachelor’s or Master’s degree in Mechanical, Nuclear, or Systems Engineering (PhD preferred for senior roles) -Familiarity with ASME Section III, ASME B31.1, or equivalent design codes -5+ years of experience in thermal-fluid systems, plant design, or power generation systems -Strong analytical, organizational, and communication skills -Ability to thrive in a collaborative, multidisciplinary startup environment -Understanding of nuclear safety, containment, and regulatory frameworks is a plus

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About Hadron Energy

-Develops patented Micro Modular Reactors (MMRs) producing 2 MWe from compact, transportable units. -Designs reactors that can be towed by a pickup and used for data centers, industrial sites, remote communities, and space missions. -Partnered with U.S. Department of Energy programs including GAIN and the HALEU Consortium. -Awarded "Most Innovative Company of the Year" by Startup Grind in mid-2025.

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