U.S. Nuclear Fleet · National

Supply Dashboard

As of Sep 15, 2026 · Updated every morning from the NRC Daily Power Reactor Status Report.

Today's Setup

the board in one read

295 MW of U.S. nuclear is offline (1.5% of the fleet), down 104 MW from yesterday. Henry Hub gas is $2.81/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: MISO availability up 3.8 pts.

MW Offline Today

295 MW

▼ 104 MW returned vs. yesterday

1,056 above 7-day avg · 9 above a year ago

% of Fleet Offline

1.5%

295 of 19,905 MW installed

Generating Now

19,610 MW

98.5% of installed capacity online

Units Reporting

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 detail

MW Offline

3,632 MW

29.9% of the Ontario fleet

Units Offline

4 of 16

Bruce, Darlington, Pickering

Delivering

8,528 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

U.S. total, all markets. The FPL, BPA, Duke Progress, MISO filter applies to the lists below and to MW offline by market.

Top Outages by MW Impact

Unit	Region	Power	MW Offline
Clinton	MISO	83%	183

Next 7 Days

See the full forward curve

From our sourced schedule where we hold a date, model projection beyond.

Seasonal Comparison

Compare seasons by market

Spring 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.