Reactor Physics & Neutronics Engineer — Micro Modular Reactor
Pisa, Italy · Onsite · Permanent · 50-60,000 € + premio
Design the core of a reactor that will actually get built
Most nuclear engineers spend a career optimising someone else's core. This is a chance to define one from a blank sheet.
Our client is a nuclear technology company developing a Micro Modular Reactor — small enough to transport, simple enough to deploy where grid power doesn't reach, and designed to produce both clean electricity and medical and industrial radioisotopes .
They are currently taking the design through the US NRC licensing process , which means the neutronics work you do here doesn't sit in a report. It goes into a licensing submittal, and then into hardware.
Why this role is different:
- Real scope, real ownership. A (team size) engineering team, not a 400-person division. Your core design decisions reach the CTO the same week you make them.
- Licensing-grade work. Your analyses become part of a formal NRC submittal — the highest-rigour environment in the industry,



and a credential that follows you for the rest of your career.
- Two missions in one machine. Carbon-free power and isotope production for cancer diagnostics and treatment.

What you'll own
You'll be the reactor physics authority on the MMR core — from first-principles modelling through to defending your numbers in front of a regulator.
- Core design & optimisation — define and iterate the core configuration, working the trade space between reactivity, thermal limits, cycle length and manufacturability.
- Neutronics analysis — criticality and reactivity coefficients, burnup and depletion, cross-section generation, flux and power distributions.
- Shielding & dose — shielding design, dose rate calculations, and validation of radiation barriers.
- Fuel cycle — fuel management strategy and fuel cycle analysis for a first-of-a-kind core.
- Licensing support — produce the analyses and technical documentation that support the

📌 Nuclear Reactor Engineer (Pisa)
🏢 Danem People Group
📍 Pisa