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HUBURB
EnergyMaturity: Early

Small Modular Reactors

Nuclear reactors in the roughly 50–300 MW range, built from factory-produced modules rather than assembled entirely on site.

Why does it matter?

Data centres and industrial sites want firm, carbon-free power on a predictable schedule. Conventional large reactors are slow and expensive to build; the SMR argument is that repetition drives cost down.

How does it work?

Standardised modules are manufactured off site and shipped for assembly. Many designs use passive safety systems that shut down without operator action or external power.

Where is it today?

A handful of designs have regulatory approval; very few units are operating commercially. Cost per megawatt from repeat builds is the unproven claim.

Applications

  • · Data centre power
  • · Industrial heat
  • · Remote grids

Key challenges

  • · Licensing timelines
  • · First-of-a-kind cost
  • · Fuel supply chains
  • · Public siting and consent

Advantages

  • · Firm low-carbon output
  • · Smaller siting footprint
  • · Factory production

Infrastructure required

Fuel supply, grid interconnection and specialised regulatory capacity.

Companies working on it

Recent developments

Huburb timeline

  1. Small modular reactor design clears a regulatory review milestone

Related technologies