Season on Season
Seasonal Comparison
Nuclear refuels in spring and fall and runs flat through the peaks, so the only honest comparison
is the same season in a different year. Pick one market to compare it across years, or several to compare them
against each other.
Season
Fall 2026, SRP
Season in progressFall 2026 averaged 3 MW off line across SRP, 0.1% of installed nuclear capacity, peaking at 66 MW on August 10. Only 76 days of the season have been reported so far, so treat the comparison as partial.
Average MW off line
3
0.1% of installed capacity
Season peak
66
Aug 10, 2026
Refueling outages
0
Unplanned events
0
0 reactor trips
Units involved
0
distinct reactors off line
Energy not produced
5 GWh
over the whole season
The Same Season, Year on Year
SRP
Every line is the same calendar window in a different year, so the curves are directly comparable. The current
season is drawn heaviest. Where the lines separate is where a year was genuinely different, not where the
calendar moved.
Add 53 more seasons to the comparison
Individual · $165/mo
Your plan reaches back to the current season. The record runs to Spring 2000. Most readers do not want to click through the archive a season at a time. The depth is worth having in bulk, to fit a model against, which is what the API and the bulk export are for.
- Deeper season history on every chart
- The full daily series behind it
- Bulk export and API access
- Every market, not just the national curve
Season by Season, SRP
1 season in your window · 53 more on recordSpring seasons in cyan, fall in gold. Fall is normally the heavier of the two: more units
refuel into the winter peak than out of it.
The hatched bars are seasons outside your history window. They are drawn at a fixed height to
show the record exists, not at their real value, so the chart never hints at a figure you have not unlocked.
Unlock the full record.
Fall 2026 by Market
heaviest first · click a market to add it to the comparisonSeason History, SRP
1 of 54 seasons in your window| Season | Avg MW off | Peak MW | Peak on | % of fleet | Refuels | Unplanned | Units |
|---|---|---|---|---|---|---|---|
| Fall 2026 partial | 3 | 66 | Aug 10 | 0.1% | 0 | 0 | 0 |
| 53 earlier seasons back to Spring 2000, and the daily series behind them. Unlock | |||||||
How to read older seasons. The megawatt columns are built from the
daily power record of the units operating today, carried back; the outage counts include units that have
since shut down. Across recent seasons those are the same fleet, so the two agree. Go back far enough and
the megawatt figures describe today's fleet in an older year, which is the right basis for comparing supply
but not for counting what the industry did at the time.
Season history follows the same backward window as the national curve and the ISO
breakdown, so there is one rule across the product rather than a special case here. The full record runs to
Spring 2000; for model fitting, take it through the
API or the bulk export rather than a season at a time.
The record says what happened. What about what is coming?
Individual · $165/mo
The forward curve is the same question pointed the other way: a probability band on MW offline out to 18 months, with every published outage date and every projected one behind it.
- Probabilistic MW-offline curve, P10 to P90
- Every published and projected outage date
- The same curve cut by market
- Scored daily against what actually happens