Operator Fleet Excellence Leaderboard Subscribers
Which US nuclear operator actually runs the best fleet. Every operating unit is scored 0 to 100 on its own operating record, then rolled up to the company that runs it, so a fleet cannot hide a weak station behind a strong one. 20 operators and 93 units, rescored daily.
- Every operator ranked by fleet composite
- Reliability, Efficiency and Discipline by fleet
- Each operator's best and worst unit
- Share of each fleet in the top and bottom quartile
- Unit-level breakdown under every operator
- Comparable-size fleet filters
Included with every outage subscription and with NukeWorker Gold membership. Trading the outage rather than working it? The same record, cut by power market, is on NukeGryd.
How fleet rankings are computed
NukeWorker's Operational Excellence Score ranks every active US nuclear unit on a 0–100 composite of seven measured performance metrics. This page rolls those unit scores up to the operator level so you can see which company runs the best fleet.
Aggregation: Each operator's fleet score is the simple unweighted average of its scored units' composites and sub-scores. We use unweighted averaging (rather than MWe-weighted) because this is meant to reward consistency across the fleet — a single weak performer drags an operator down regardless of nameplate, which is what an "operator excellence" metric should measure.
- Composite — average of the unit composites in the fleet.
- Top Q / Bottom Q — share of the operator's units that fall in the top and bottom INPO-style quartiles of the full fleet.
- Best / Worst — the operator's highest- and lowest-scoring individual units.
- Provisional units (e.g. Vogtle 4) and decommissioned units are excluded from the operator's average.
Fleet-size buckets: mega-fleet (8+ units), mid (3–7), small (1–2). Use the pills above to compare like-sized operators.
Refreshes daily. See the unit-level Operator Efficiency Leaderboard →