{
  "slug": "rolls-royce-smr",
  "name": "Rolls-Royce SMR",
  "company_id": null,
  "coolant": "Light water",
  "reactor_type": "pwr",
  "output_mwe": 470,
  "thermal_mw": null,
  "fuel_type": "Uranium dioxide",
  "enrichment_class": "LEU",
  "enrichment_pct": "Under 5% U-235",
  "regulator": "UK ONR and Environment Agency",
  "application_type": "Generic Design Assessment",
  "application_date": null,
  "review_phase": "GDA Step 3, the final step, expected to conclude late 2026",
  "decision_expected": "2026",
  "credibility_tier": "under_review",
  "docket": "UK GDA, Rolls-Royce SMR Limited — Step 3",
  "first_site_name": "Wylfa, Anglesey",
  "first_site_country": "GBR",
  "offtakers": "Great British Energy - Nuclear",
  "model_match": null,
  "transportable": 0,
  "form_factor": null,
  "what_if": null,
  "notes": "At 470 MWe this stretches the definition of \"small\" — it is closer to a compact conventional PWR than a microreactor, which is deliberate: it uses proven light water technology and factory-built modules to attack cost rather than physics. Selected as the UK's preferred SMR technology in 2025 with three units planned at Wylfa.\n",
  "source_name": "UK Office for Nuclear Regulation and Rolls-Royce SMR",
  "source_url": "https://gda.rolls-royce-smr.com/gda-process",
  "url": "https://nuclearchain.net/smr/rolls-royce-smr/",
  "license": "CC BY 4.0",
  "attribution": "NuclearChain (nuclearchain.net)"
}