Nuclear Reactor Engineer

Most days mix reactor physics analysis, fuel management work, and design support — running neutronics codes (CASMO, SIMULATE, SCALE, MCNP), supporting core design and reload optimization, contributing to safety analyses, addressing operational reactor performance issues, and partnering with thermal-hydraulic, fuel performance, and operations teams. You're often working at utilities, fuel vendors, EPC firms, advanced reactor developers, or naval programs, and the reactor type — PWR, BWR, advanced — shapes the methods.

What tends to be harder than people expect is the depth of computational physics combined with regulatory documentation. Neutronics codes take years to develop expertise in, and reactor calculations carry direct safety implications. Configuration management, design control, and licensing basis structure every output.

People who tend to thrive here are technically rigorous, comfortable with sophisticated simulation, patient with regulatory frameworks, and quietly committed to reactor safety. If you want fast prototype work, reactor engineering moves slowly. If you like the deep technical work of designing and analyzing the core that everything else in a nuclear plant supports, the role offers durable niche demand and meaningful long-term technical depth.