Senior Nuclear Fuel Performance Engineer

What we do at Blykalla

Blykalla is a Swedish deep-tech company at the forefront of the nuclear industry, pioneering the development of small modular reactors that provide clean, safe, and reliable energy. Thanks to lead-cooling, we achieve high safety in a very compact format, allowing for a simple and cost-effective design that can be mass-produced. Our unique reactor design will provide safe and green baseload energy that perfectly complements solar and wind power.

Help Us Prove a New Standard in Nuclear Fuel

Are you a technically sharp, self-driven engineer or scientist who understands how nuclear fuel really behaves - and how to prove it with credible models?

Join Blykalla and lead the fuel performance modelling effort that underpins development and qualification of a novel nuclear fuel in an advanced reactor. This role puts you at the center of predicting, validating, and defending fuel behavior for the western world’s first lead-cooled SMR.

You’ll own the fuel models and codes that allow for producing regulator-ready evidence that our fuel performs as intended.

What you’ll get to do

Your mission is to ensure that we can predict, explain and justify fuel behavior with confidence, using validated models, defensible assumptions and traceable data.

Build and evolve fuel performance models

Develop, extend, and adapt fuel performance models for nitride fuel in a fast-spectrum operation, with a focus on physical mechanisms rather than black-box use

Understand and improve model behavior by analyzing why models work, where they break down, and what must be changed for lead-cooled operation

Apply and benchmark models against other fuel types, including oxide and metallic fuels, to support comparison, validation, and fallback options

Shape data, experiments, and model credibility

Define what experimental and operational data are needed to support, challenge, and improve fuel performance models

Work closely with experimental and design teams to specify irradiation tes