CEG · 8-K · 20260806PR000097

Nuclear Fleet Operations

Constellation Energy Corp · 2026-08-06 · Importance 25 · Surprise 32

Constellation’s nuclear fleet, including owned output from the Salem and South Texas Project Generating Stations, produced 44,160 GWh in the second quarter of 2026, compared with 45,170 GWh a year earlier. Its operated nuclear plants excluding Salem and South Texas Project achieved a 93.0% capacity factor, down from 94.8%. Planned refueling outage days increased to 86 from 41, while renewable energy capture remained broadly stable at 96.0% versus 96.1%.

Key facts

• Nuclear generation by region in Q2 2026: Mid-Atlantic 12,676 GWh; Midwest 23,112 GWh; New York 6,336 GWh; ERCOT 2,036 GWh; Total Nuclear Generation 44,160 GWh. source
• There were 86 planned refueling outage days in Q2 2026 and 41 in Q2 2025 for sites we operate. source
• There were total outage days for sites we operate in Q2 2026: 106 days (86 refueling and 20 non-refueling); total outage days in Q2 2025: 63 days (41 refueling and 22 non-refueling). source
• Our nuclear fleet produced 44,160 gigawatt-hours (GWhs) in Q2 2026, compared with 45,170 GWhs in Q2 2025. source
• Excluding Salem and STP, our nuclear plants at ownership achieved a 93.0% capacity factor in Q2 2026, compared with 94.8% in Q2 2025. source
• There were 20 non-refueling outage days in Q2 2026 and 22 in Q2 2025 for sites we operate. source
• Renewable energy capture for wind, solar and run-of-river hydro fleet was 96.0% in Q2 2026, compared with 96.1% in Q2 2025. source
• Nine Mile Point Unit 2 is currently licensed to operate until 2046. source