CEG · 10-Q · 2026Q2 · Full report

Nuclear Fleet Reliability

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

Nuclear fleet capacity factor declined to 92.7% for the six months ended June 30, 2026 from 94.5% in the prior-year period. Second-quarter capacity factor was 93.0%, down from 94.8%. The filing attributes unfavorable operating impacts to nuclear outages, while the fleet continues to operate at a high utilization level. Following the Calpine acquisition, Constellation also reported a 5.2% six-month equivalent forced outage factor for its natural gas, oil, and pumped-storage hydro fleet.