1Y
5Y
All
All
PWR
BWR
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Total megawatt-electric generation from the U.S. commercial nuclear fleet on the most recent reporting date.
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Current Generation
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Grid utilization: total generation divided by total installed capacity of all reporting units. Green ≥90%, Orange 80-89%, Red <80%.
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Capacity Factor
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Average capacity factor across all days in the selected time range. A key measure of fleet performance.
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Period Average
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Highest single-day generation (MWe) achieved during the selected time period.
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Period Peak Gen
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Number of days where the fleet capacity factor dropped below 80%. A proxy for significant outage or generation loss events.
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Days Below 80%
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Number of individual reactor units reporting power data on the most recent date. Tracks fleet size over time.
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Reporting Units
Active in Fleet
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Total daily megawatt generation from all reporting U.S. commercial nuclear units compared to their combined installed capacity.
Fleet Generation vs Capacity (MWe)
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Daily fleet capacity factor — generation ÷ installed capacity. Red shaded areas highlight periods below 80%. Dashed lines show average capacity factors for other energy sources (EIA data).
Fleet Capacity Factor %
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Average capacity factor by month across all years. Blue = winter (Nov–Mar), orange = summer (May–Sep) when outage scheduling differs.
Seasonal Pattern (Monthly Avg)
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Monthly average capacity factor overlaid for the most recent 5 years, comparing month by month. Current year highlighted in bold green.
Year-over-Year Comparison
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Reactor units ranked by average capacity factor. Bar thickness reflects unit capacity (MWe). Toggle top/bottom performers or group by owner.
Top & Bottom 10 by Capacity Factor 5yr data
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Average capacity factor by NRC region (I–IV), calculated from per-unit generation data over the last 5 years.
Regional Generation Breakdown 5yr data
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Histogram of days by capacity factor range. Green bins (90–100%) = strong fleet performance; red bins = significant generation loss.
Capacity Factor Distribution
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Interactive map with color-coded circles per reactor. Green ≥90%, orange 80–90%, red <80%. Circle size reflects plant capacity in MWe.
Regional Capacity Factor Map 5yr data
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Number of reactor units reporting power data over time. Hidden when fleet size is stable (e.g. 1-year view).
Fleet Size Over Time
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Calendar-style grid of daily fleet capacity factor by color. Green = high utilization, red = low. Hover any cell for the exact date and percentage.
Capacity Factor Heatmap (Daily) 5yr data
<70%
70%
80%
85%
90%
95%+
No data
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Compare two reactor units' monthly capacity factor trends side by side. Useful for benchmarking performance or tracking improvement over time.
Plant Comparison 5yr data
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License expiration timeline per unit. Color = urgency: red <5yr, orange 5–10yr, yellow 10–20yr, green 20+ years remaining.
Fleet Sunset — License Expiration Timeline
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Day-by-day table of fleet generation, capacity, capacity factor, and active unit count. Sortable and exportable to CSV.
Day-by-Day Detailed Data
| Date | Generation (MWe) | Capacity (MWe) | Capacity Factor | Units |
|---|
Notes:
1. Capacity Factor is calculated as
2. Capacity: Sum of “Net MWe” ratings for all units reporting power > 0% on that day.
3. Sources: Daily Power Levels from NRC Daily Status Reports. Unit MWe ratings from EIA and internal facility records.
4. Historical Data: Legacy data (1999–2004) has been normalized from archival records. Some minor gaps may exist.
5. Per-plant filtering: Available for the last 5 years of data. Older fleet-level data is shown as aggregates.
1. Capacity Factor is calculated as
Total Generation (MWe) / Total Operating Capacity (MWe).2. Capacity: Sum of “Net MWe” ratings for all units reporting power > 0% on that day.
3. Sources: Daily Power Levels from NRC Daily Status Reports. Unit MWe ratings from EIA and internal facility records.
4. Historical Data: Legacy data (1999–2004) has been normalized from archival records. Some minor gaps may exist.
5. Per-plant filtering: Available for the last 5 years of data. Older fleet-level data is shown as aggregates.
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