{
  "site": "ledger.nuclear.events",
  "as_of": "2026-10-26",
  "data_as_of": "2026-10-23",
  "data_status": "seed",
  "data_source": "SMR Deal Tracker seed (42 deals), exported without changes to data/deals.json",
  "units": "MWe as claimed by the parties (not metered delivery) unless a row says otherwise",
  "binding_mw_before_2030": {
    "definition": "Deal tiers 1-3 (binding offtake). Fission only; rows with no stated MW are excluded; nested sub-deals removed so nothing is counted twice.",
    "delivery_date_filter_applied": false,
    "delivery_date_note": "Totals are not yet cut by first-delivery date. Several binding rows deliver in 2030 or later: Perry/Davis-Besse/Beaver Valley uprates (first 2031), Calvert Cliffs uprate share (2030-2032), Constellation-Google PJM uprates (first 2028, all by end-2032), Hermes 2 (target 2030), Darlington BWRX-300 Unit 1 (grid 2030). Long Mott has no public COD in the tracker. A strict before-2030 cut is planned for the Control Room.",
    "new_reactor_tiers_1_3_mw": 670,
    "new_reactor_rows": [
      {
        "id": "hermes-2",
        "deal": "Hermes 2",
        "mw_counted": 50,
        "dates": "PPA Aug 2025; groundbreaking Apr 2026; target 2030",
        "grade": "A"
      },
      {
        "id": "long-mott-generating-station",
        "deal": "Long Mott Generating Station",
        "mw_counted": 320,
        "dates": "NRC final SE targeted Nov 2026",
        "grade": "A"
      },
      {
        "id": "darlington-bwrx-300-unit-1",
        "deal": "Darlington BWRX-300 Unit 1",
        "mw_counted": 300,
        "dates": "Approved May 8, 2025; complete end-2029; grid 2030",
        "grade": "B"
      }
    ],
    "existing_restart_uprate_mw": 13481,
    "existing_breakdown_mw": {
      "tier_1_operating_plants": 9617,
      "tier_2_restarts_and_uprates": 3864
    },
    "total_binding_mw": 14151,
    "existing_share_of_binding": 0.953
  },
  "tier_4_equity_mw": 320,
  "non_binding_pipeline_tiers_5_8_mw": 43783,
  "non_binding_to_binding_ratio": 3.09,
  "largest_non_binding_item": {
    "deal": "Switch master power agreement (Oklo-Switch)",
    "mw_counted": 12000,
    "note": "Non-binding by its own terms"
  },
  "by_tier": [
    {
      "tier": 1,
      "name": "Binding PPA, operating plant",
      "deals": 7,
      "mw_counted": 9617
    },
    {
      "tier": 2,
      "name": "Restart/uprate with offtaker",
      "deals": 7,
      "mw_counted": 3864
    },
    {
      "tier": 3,
      "name": "Binding offtake, new reactor",
      "deals": 5,
      "mw_counted": 670
    },
    {
      "tier": 4,
      "name": "Offtaker equity",
      "deals": 1,
      "mw_counted": 320
    },
    {
      "tier": 5,
      "name": "Development/site with milestones",
      "deals": 7,
      "mw_counted": 7445
    },
    {
      "tier": 6,
      "name": "Framework / MOU / GW target",
      "deals": 9,
      "mw_counted": 27840
    },
    {
      "tier": 7,
      "name": "RFP / LOI / exploring",
      "deals": 6,
      "mw_counted": 8498
    },
    {
      "tier": 8,
      "name": "'Nuclear-powered' campus, no vendor/license/fuel",
      "deals": 0,
      "mw_counted": 0
    }
  ],
  "by_k_band": {
    "k<1": {
      "deals": 23,
      "mw_counted": 44103
    },
    "k=1": {
      "deals": 9,
      "mw_counted": 3729
    },
    "k>1": {
      "deals": 8,
      "mw_counted": 10422
    }
  },
  "deal_count": 42,
  "deals_excluded_from_totals": [
    "Loviisa PPA (Finland)",
    "Orion fusion PPA (comparator)",
    "ARC offtake (comparator)",
    "Army Janus (5 bases)",
    "North Anna SMR study",
    "Sabey–TerraPower MOU"
  ],
  "promise_ledger": {
    "rows": 45,
    "as_of": "2026-10-26",
    "by_status": {
      "delivered": 2,
      "slipped": 13,
      "pending": 28,
      "cancelled": 1,
      "dropped": 1
    },
    "note": "Counts from the Promise Ledger seed, including the Antares Mark-1 row added Oct 26, 2026."
  },
  "rounding": "Headline figures in GW: one decimal, except new-reactor binding MW (two decimals) because it is under 1 GW.",
  "methodology_notes": [
    "Tier is set by the strongest evidence that binds the buyer, not by the headline.",
    "Evidence grades: A regulatory/SEC/court; B government report, audited financials, sworn testimony; C company release; D press; E social or unverified.",
    "k-band on a deal is derived: tiers 1-3 with the plant operating or in fuel load (licensing rung 5) = k>1; other tiers 1-3 = k=1; tiers 4-8 = k<1. Fusion comparators carry no band.",
    "Excluded from MW totals: fusion comparators, and rows where MW are not stated (Loviisa, Army Janus, North Anna, Sabey).",
    "The X-energy 5 GW and Kairos 500 MW remainders exclude their named sub-projects to avoid double counting.",
    "These data are a seed set. Where a field could not be verified it says so; no number is estimated to fill a gap."
  ],
  "method_url": "https://ledger.nuclear.events/method.html"
}