Market Briefing · live
Markets
Where U.S. nuclear supply is tightest right now, and what is coming off line next. As of Aug 14, 2026 · Updated every morning from the NRC Daily Power Reactor Status Report.
Most-stressed Market
MISO
7.3% offline · 843 MW
MW in Refueling Now
1,598 MW
2 units at a full outage
MW at Risk · Next 60 Days
paid · capacity at risk in 60 days
Biggest 30-day Mover
Florida Power & Light (FPL)
availability ▼ 26.9 pts
By Market
Available nuclear MW now, the day's move, vs 7-day and a year ago, and the 30-day trend, by balancing authority
ISO / RTO
31u
PJM
32,551 MW
99.6% available
↗ 50 MW DoD
vs 7d avg+202 MW (+0.6%)
vs 1 yr ago+829 MW (+2.6%)
Availability · 30d97.2% → 100.0%
ISO / RTO
13u
MISO
10,669 MW
92.7% available
↘ 29 MW DoD
vs 7d avg+481 MW (+4.7%)
vs 1 yr ago−57 MW (−0.5%)
Availability · 30d86.1% → 99.7%
Vertically Integrated
7u
TVA
8,181 MW
100.0% available
↗ 79 MW DoD
vs 7d avg+54 MW (+0.7%)
vs 1 yr ago0 MW (0.0%)
Availability · 30d97.3% → 100.0%
What to watch
All units at full power
Vertically Integrated
8u
Southern (SOCO)
8,080 MW
100.0% available
0 MW DoD
vs 7d avg0 MW (0.0%)
vs 1 yr ago0 MW (0.0%)
Availability · 30d100.0% → 100.0%
What to watch
All units at full power
Vertically Integrated
7u
Duke Carolinas (DUK)
7,226 MW
100.0% available
0 MW DoD
vs 7d avg0 MW (0.0%)
vs 1 yr ago0 MW (0.0%)
Availability · 30d100.0% → 100.0%
What to watch
All units at full power
ISO / RTO
4u
ERCOT
4,986 MW
100.0% available
0 MW DoD
vs 7d avg0 MW (0.0%)
vs 1 yr ago0 MW (0.0%)
Availability · 30d100.0% → 100.0%
What to watch
All units at full power
Vertically Integrated
3u
Palo Verde / SRP
3,937 MW
100.0% available
0 MW DoD
vs 7d avg+19 MW (+0.5%)
vs 1 yr ago0 MW (0.0%)
Availability · 30d98.3% → 100.0%
What to watch
All units at full power
Vertically Integrated
4u
Florida Power & Light (FPL)
2,668 MW
73.1% available
↘ 981 MW DoD
vs 7d avg−951 MW (−26.3%)
vs 1 yr ago−998 MW (−27.2%)
Availability · 30d73.1% → 100.0%
Vertically Integrated
4u
Duke Progress (CPLE)
3,593 MW
100.0% available
0 MW DoD
vs 7d avg+69 MW (+2.0%)
vs 1 yr ago0 MW (0.0%)
Availability · 30d86.6% → 100.0%
What to watch
All units at full power
ISO / RTO
3u
ISO-NE
3,352 MW
100.0% available
0 MW DoD
vs 7d avg0 MW (0.0%)
vs 1 yr ago0 MW (0.0%)
Availability · 30d74.2% → 100.0%
What to watch
All units at full power
ISO / RTO
4u
NYISO
3,267 MW
98.2% available
0 MW DoD
vs 7d avg+5 MW (+0.1%)
vs 1 yr ago−60 MW (−1.8%)
Availability · 30d97.9% → 100.0%
ISO / RTO
2u
CAISO
2,240 MW
100.0% available
0 MW DoD
vs 7d avg0 MW (0.0%)
vs 1 yr ago+593 MW (+36.0%)
Availability · 30d100.0% → 100.0%
What to watch
All units at full power
ISO / RTO
2u
SPP
1,925 MW
98.8% available
0 MW DoD
vs 7d avg−20 MW (−1.0%)
vs 1 yr ago−23 MW (−1.2%)
Availability · 30d88.1% → 100.0%
Vertically Integrated
1u
Bonneville (BPAT)
1,151 MW
100.0% available
0 MW DoD
vs 7d avg0 MW (0.0%)
vs 1 yr ago0 MW (0.0%)
Availability · 30d100.0% → 100.0%
What to watch
All units at full power
Vertically Integrated
1u
Dominion SC (SCEG)
977 MW
100.0% available
0 MW DoD
vs 7d avg0 MW (0.0%)
vs 1 yr ago0 MW (0.0%)
Availability · 30d100.0% → 100.0%
What to watch
All units at full power
Available MW = nuclear generating MW now (installed nuclear MW minus what is offline), at the 98% full-power floor. DoD is the change since yesterday; the 30-day spark is the market's availability (% of its nuclear fleet generating). "What to watch" is the largest unit offline now, with the date it went down.
Biggest 30-Day Movers
Signed change in nuclear availability over the last 30 daysFlorida Power & Light (FPL)
↘ −26.9 pp
MISO
↘ −6.7 pp
NYISO
↘ −1.8 pp
SPP
↘ −1.2 pp
PJM
↗ +0.1 pp
TVA
↗ +0.0 pp
Southern (SOCO)
↗ +0.0 pp
Duke Carolinas (DUK)
↗ +0.0 pp
ERCOT
↗ +0.0 pp
Palo Verde / SRP
↗ +0.0 pp
Duke Progress (CPLE)
↗ +0.0 pp
ISO-NE
↗ +0.0 pp
CAISO
↗ +0.0 pp
Bonneville (BPAT)
↗ +0.0 pp
Dominion SC (SCEG)
↗ +0.0 pp
Change in each market's nuclear availability (generating MW as a share of installed nuclear MW) between 30 days ago and today. Positive points = more nuclear back online.
Most-stressed Markets
By share of nuclear fleet offline, lowest availability first| Market | Type | Units | Availability | MW Offline | % Offline | Grid tomorrow | 30d Δavail |
|---|---|---|---|---|---|---|---|
| Florida Power & Light (FPL) | Non-ISO | 4 | 73.1% | 981 | 26.9% | – | ▼ 26.9 |
| MISO | ISO/RTO | 13 | 92.7% | 843 | 7.3% | normal | ▼ 6.7 |
| NYISO | ISO/RTO | 4 | 98.2% | 60 | 1.8% | soft | ▼ 1.8 |
| SPP | ISO/RTO | 2 | 98.8% | 23 | 1.2% | tight | ▼ 1.2 |
| PJM | ISO/RTO | 31 | 99.5% | 141 | 0.4% | soft | ▲ 0.1 |
| TVA | Non-ISO | 7 | 100.0% | – | 0.0% | – | ▲ 0.0 |
| Duke Progress (CPLE) | Non-ISO | 4 | 100.0% | – | 0.0% | – | ▲ 0.0 |
| Duke Carolinas (DUK) | Non-ISO | 7 | 99.8% | – | 0.0% | – | ▲ 0.0 |
| Bonneville (BPAT) | Non-ISO | 1 | 100.0% | – | 0.0% | – | ▲ 0.0 |
| ERCOT | ISO/RTO | 4 | 100.0% | – | 0.0% | normal | ▲ 0.0 |
| CAISO | ISO/RTO | 2 | 100.0% | – | 0.0% | soft | ▲ 0.0 |
| Southern (SOCO) | Non-ISO | 8 | 100.0% | – | 0.0% | – | ▲ 0.0 |
| ISO-NE | ISO/RTO | 3 | 100.0% | – | 0.0% | soft | ▲ 0.0 |
| Palo Verde / SRP | Non-ISO | 3 | 100.0% | – | 0.0% | – | ▲ 0.0 |
| Dominion SC (SCEG) | Non-ISO | 1 | 100.0% | – | 0.0% | – | ▲ 0.0 |
Availability = nuclear generating MW ÷ installed nuclear MW. "Grid tomorrow" is the day-ahead demand forecast vs the trailing-30-day norm, where a nuclear loss bites hardest. 30d Δavail is the change in the market's nuclear availability over the last 30 days.
The upcoming outage pipeline is a paid feature
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