U.S. REACTOR SUPPLY · DAILY DESK

See today's nuclear supply loss, the forward range, and the market exposure.

US Nuclear Desk turns public reactor operating data into a daily supply picture for market and asset teams: current MW losses, the units behind each change, market concentration, recent operating history, and a probabilistic forward range that stays separate from observed supply.

94 U.S. reactors plus 16 Ontario units, with U.S. market mapping and a separate IESO view.

18,622 MW OFFLINE NOW
19.2% U.S. FLEET OFF
80.8 AVAILABILITY
PJM MOST OFFLINE
THIS MORNING'S READ

Nuclear availability 80.8

Read the latest NRC status change, fleet availability and market concentration before opening the detailed boards.

798489951002026-07-22 · 99.8%2026-07-23 · 99.8%2026-07-24 · 99.9%2026-07-25 · 99.6%2026-07-26 · 99.9%2026-07-27 · 99.8%2026-07-28 · 99.7%2026-07-29 · 99.5%2026-07-30 · 99.6%2026-07-31 · 99.6%2026-08-01 · 98.6%2026-08-02 · 98.5%2026-08-03 · 98.6%2026-08-04 · 97.6%2026-08-05 · 97.6%2026-08-06 · 97.4%2026-08-07 · 97.9%2026-08-08 · 97.5%2026-08-09 · 98.4%2026-08-10 · 98.0%2026-08-11 · 98.1%2026-08-12 · 97.5%2026-08-13 · 98.8%2026-08-14 · 97.9%2026-08-15 · 98.2%2026-08-16 · 98.8%2026-08-17 · 99.0%2026-08-18 · 99.1%2026-08-19 · 98.9%2026-08-20 · 99.0%2026-08-21 · 98.8%2026-08-22 · 98.7%2026-08-23 · 98.6%2026-08-24 · 98.5%2026-08-25 · 98.6%2026-08-26 · 98.8%2026-08-27 · 97.6%2026-08-28 · 97.8%2026-08-29 · 97.8%2026-08-30 · 98.2%2026-08-31 · 98.1%2026-09-01 · 98.0%2026-09-02 · 98.8%2026-09-03 · 99.3%2026-09-04 · 98.4%2026-09-05 · 96.5%2026-09-06 · 96.0%2026-09-07 · 96.4%2026-09-08 · 95.4%2026-09-09 · 95.2%2026-09-10 · 95.8%2026-09-11 · 95.5%2026-09-12 · 93.2%2026-09-13 · 91.5%2026-09-14 · 92.4%2026-09-15 · 93.0%2026-09-16 · 92.6%2026-09-17 · 92.4%2026-09-18 · 92.8%2026-09-19 · 90.8%2026-09-20 · 92.3%2026-09-21 · 92.8%2026-09-22 · 92.8%2026-09-23 · 92.9%2026-09-24 · 92.9%2026-09-25 · 93.0%2026-09-26 · 91.3%2026-09-27 · 91.2%2026-09-28 · 90.1%2026-09-29 · 88.9%2026-09-30 · 88.8%2026-10-01 · 88.8%2026-10-02 · 88.5%2026-10-03 · 84.6%2026-10-04 · 84.2%2026-10-05 · 85.3%2026-10-06 · 85.4%2026-10-07 · 85.8%2026-10-08 · 85.8%2026-10-09 · 85.7%2026-10-10 · 84.8%2026-10-11 · 83.3%2026-10-12 · 80.8%2026-10-13 · 81.3%2026-10-14 · 81.2%2026-10-15 · 82.7%2026-10-16 · 82.7%2026-10-17 · 82.1%2026-10-18 · 81.6%2026-10-19 · 80.8%07-2208-1309-0509-2710-19
THREE FORWARD SIGNALS

Projected outage start

Probability-weighted cycle timing from the existing forward model.

Outage overrun

Observed outage duration compared with operating history.

Forced-outage duration

Empirical duration behavior for unscheduled full outages.

MODEL PERFORMANCE

Every forecast is accompanied by a measured historical error record.

1,444MW MAE
73.7%
365
365 origins
See the full record →
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National supply curve

Track derived MW offline across the U.S. fleet and see the operating trend.

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A page for every reactor

Current power, outage history, operating record and plant context in one page.

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How well each unit runs

Compare capacity factor, outage episodes and breaker-to-breaker streaks.

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A page for every market

Mapped nuclear supply, availability, outages and the units driving the move.

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Season against season

Put today against prior operating seasons without hiding the raw history.

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The next twenty years

Plant and license horizon fields appear only where a verified source is loaded.

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Probabilistic forward curve

P10/P50/P90 MW-offline bands from the existing forecast engine.

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ISO / RTO breakdown

Market-level supply intelligence with plan-gated forward detail.

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Ontario, to the hour

Separate IESO generator-output view, never mixed into U.S. totals.

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Market impact

Translate observed nuclear supply loss into market-level MW exposure.

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Outage-risk radar

Rank empirical forced-outage hazard without claiming operator intent.

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Scenario builder

Stress-test the supply curve while leaving the baseline untouched.

Inspect the evidence before choosing a plan.

Open the national dashboard, inspect the source-driven boards and review the scored accuracy record.

Choose access Start free
Reading the desk: current U.S. values come from stored NRC operating observations; Ontario stays separate, and forward ranges are labelled model output rather than observed supply.
U.S. sourceNRC daily reactor power observations
Ontario sourceSeparate IESO generator output
Forecast labelP10/P50/P90 is model output, not observed supply

Each surface keeps source observations, derived MW and probabilistic output visually distinct so the number can be traced back to its basis.