U.S. Nuclear Fleet · National
Supply Dashboard
As of Oct 30, 2026 · Updated every morning from the NRC Daily Power Reactor Status Report.
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Today's Setup
the board in one read16,318 MW of U.S. nuclear is offline (16.8% of the fleet), up 108 MW from yesterday. Henry Hub gas is $2.76/MMBtu (cheap), so a supply loss has less price upside than usual. No ISO is forecast tight tomorrow, so losses would be largely absorbed. Biggest 30-day swing: CAISO availability down 50.1 pts.
MW Offline Today
16,318 MW
▲ 108 MW more offline vs. yesterday
619 below 7-day avg · 2,084 below a year ago
% of Fleet Offline
16.8%
16,318 of 96,853 MW installed
Generating Now
80,534 MW
83.2% of installed capacity online
Units Reporting
94
Operating reactors in the daily status report
Outage Overrun
███
How many days past its published date each outage will actually run.
Nobody else publishes this
Ontario (IESO) separate fleet
Ontario detailMW Offline
4,722 MW
38.8% of the Ontario fleet
Units Offline
7 of 16
Bruce, Darlington, Pickering
Delivering
7,396 MW
of 12,160 MW installed
Resolution
1 hour
vs. once-daily for the U.S. fleet
Ontario also appears as its own line on the supply curve and in the outage ranking below. Ontario is reported as a separate fleet and is never added into the U.S. national figures above. IESO grid-operator market data (MW delivered), not NRC percent-power.
Outage overrun is one of three numbers nobody else publishes. The operator files a return-to-service date. This is how many days past it the outage will actually run. No other vendor publishes a number for this at all. It is the Outage Overrun figure above. See who is exposed
National MW Offline
Top Outages by MW Impact
| Unit | Region | Power | MW Offline |
|---|---|---|---|
| Palo Verde 1 | SRP | 0% | 1,311 |
| Peach Bottom 2 | PJM | 0% | 1,265 |
| Millstone 3 | ISO-NE | 0% | 1,243 |
| Comanche Peak 1 | ERCOT | 0% | 1,209 |
| Callaway | MISO | 0% | 1,190 |
| Salem 1 | PJM | 0% | 1,146 |
| Sequoyah 2 | TVA | 0% | 1,126 |
| Diablo Canyon 1 | CAISO | 0% | 1,122 |
Next 7 Days
From our sourced schedule where we hold a date, model projection beyond.
Seasonal Comparison
Compare seasons by marketSpring and fall refueling peaks repeat every year. This is where the supply swings live.
See this season against prior years, nationally or for one market.