Quad Cities Unit 1

Constellation · Mississippi · IL

Operational7-day point: 99.2%

Run May 15 · source live

Year:

Operational ≥ 95%Weather dipNon-weather dipRefueling + recovery

No data for 2026.

The trend line is colored by what caused the dip: green when the plant is operational (≥ 95%), red across weather-driven dip events, magenta across non-weather-driven dip events (model predicted ≥ 95% but realization fell below 90% on at least one day in the event), and bold blue across refueling outages and the reactor ramp-back that follows until the plant returns to ≥ 95%.

Top features driving the 7-day forecast

SHAP, capacity-factor pp

Baseline 88.5 → Point 93.9top 5 features

Water temperature (14d ago)
+1.71
Water thermal stress (30d avg)
+1.32
Water thermal stress (30d max)
+1.20
Water temperature (30d avg)
+1.16
Streamflow (14d max)
+1.10

Weather inputs feeding the 14-day forecast

Trailing 30-day conditions the model uses to project the next 14 days

Air temp (max)23.1 °C

Water temp15.2 °C

Streamflow93.6 kcfs

Forecast briefing

as of May 1

Reduced power output is expected on May 2, May 9, and May 13.

Key risk days

WatchMay 2(94.3%)
The model predicts a lower chance of full power output in one day.
WatchMay 9(92.0%)
The model predicts a lower chance of full power output in nine days.
WatchMay 13(92.7%)
The model predicts a lower chance of full power output in thirteen days.

What is driving this

Warm river-water trend over the past month
Recent river water temperature
Recent air temperature
River flow rate over the past two weeks

Bottom line

The plant is expected to operate near full capacity for most of the next two weeks, but reduced output is expected on May 2, May 9, and May 13. Monitor river temperatures and flow rates, as these are key factors influencing the forecast. Consider lining up backup power supply in advance for those dates.

google.gemma-4