Senior Marine Reactor Physics & Shielding Engineer

BlueCore Energy; Long Beach (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

BlueCore Energy in Long Beach, CA seeks a Lead Reactor Physics & Shielding Engineer to own neutronics doctrine, core geometry, and shielding strategy for a marine compact PWR on a barge. You will define reactivity control, dose mapping, and safety cases across fuel life cycles, working closely with cross-functional teams in a hands‑on startup environment.

You will apply advanced Monte Carlo transport, depletion codes, and shielding tools, ensuring compliance with SRP guidelines while driving

Qualifications

• MS or PhD in Nuclear Engineering, Reactor Physics, Health Physics, or radiation transport.
• Hands‑on production depth in continuous‑energy Monte‑Carlo transport and criticality codes such as CASMO/SIMULATE, SCALE, MCNP, Serpent, or OpenMC.
• Experience with variance reduction tools like MAVRIC/Monaco, MCNP, or OpenMC.
• Experience with a lattice-physics or depletion code such as CASMO, SCALE, or Serpent.
• Proficiency with a nuclide‑inventory and decay tool such as ORIGEN.
• Deep understanding of NUREG-0800 SRP sections 4.2, 4.3, 9.1.1, 11.1, and 12.2–12.5.

Responsibilities

• Provide comprehensive neutronics support, establishing core geometry, enrichment, lattice, beryllium reflector, and rotating-drum control architecture.
• Own criticality, reactivity coefficients (MTC, Doppler), kinetics, depletion, and cycle length.
• Establish and own the shutdown-margin and criticality-safety cases across the full fuel life cycle, including fresh, in-core, spent, and storage phases.
• Maintain the criticality base deck and the SCALE calculation catalog.
• Develop core and coolant source terms, and set the activation and decommissioning source term.
• Design the primary and secondary shields, mapping both occupational and crew doses for a space-constrained vessel.
• Analyze deep-penetration radiation streaming through structural penetrations utilizing variance reduction techniques.
• Supply critical neutronics inputs to Chapters 4, 5, and 15, and calculate control-room and offsite design-basis accident (DBA) doses.

Skills

Monte Carlo transport

Lattice-physics / depletion

Radiation shielding

Nuclear engineering knowledge

ORIGEN / decay tools

NUREG-0800 SRP knowledge

Education

MS or PhD in Nuclear Engineering, Reactor Physics, Health Physics, or radiation transport

Tools

CASMO/SIMULATE

SCALE

MCNP

Serpent

OpenMC

MAVRIC/Monaco

OpenMC_ENDF/B data

Job description

BlueCore Energy in Long Beach, CA seeks a Lead Reactor Physics & Shielding Engineer to own neutronics doctrine, core geometry, and shielding strategy for a marine compact PWR on a barge. You will define reactivity control, dose mapping, and safety cases across fuel life cycles, working closely with cross-functional teams in a hands‑on startup environment.

You will apply advanced Monte Carlo transport, depletion codes, and shielding tools, ensuring compliance with SRP guidelines while driving