{
  "slug": "smr-300",
  "name": "SMR-300",
  "company_id": "holtec",
  "coolant": "Light water",
  "reactor_type": "pwr",
  "output_mwe": 300,
  "thermal_mw": null,
  "fuel_type": "Uranium dioxide",
  "enrichment_class": "LEU",
  "enrichment_pct": "Under 5% U-235",
  "regulator": "US NRC and UK ONR",
  "application_type": "Construction permit (USA); Generic Design Assessment (UK)",
  "application_date": "2026-01",
  "review_phase": "US application under review; UK GDA Step 2 complete",
  "decision_expected": "2029",
  "credibility_tier": "under_review",
  "docket": "NRC licence application, Palisades Pioneer Units 1 and 2; ONR GDA Step 2 completed March 2026",
  "first_site_name": "Palisades, Michigan",
  "first_site_country": "USA",
  "offtakers": null,
  "model_match": "SMR-300",
  "transportable": 0,
  "form_factor": null,
  "what_if": null,
  "notes": "Proposed for the site of the Palisades plant that Holtec itself owns and restarted — an unusual position, since the developer already holds the site, the licence history and the grid connection. Conventional LEU fuel, so no HALEU exposure.\n",
  "source_name": "UK Office for Nuclear Regulation and Holtec",
  "source_url": "https://www.onr.org.uk/generic-design-assessment/assessment-of-reactors/holtec-international-smr-300",
  "url": "https://nuclearchain.net/smr/smr-300/",
  "license": "CC BY 4.0",
  "attribution": "NuclearChain (nuclearchain.net)"
}