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Comparing Vogtle 1 and Sequoyah 2. Vogtle 1 leads on the composite score (51/100, Mid Quartile), 18 points ahead of Sequoyah 2. Vogtle 1 takes Reliability (47). Vogtle 1 takes Efficiency (76). Sequoyah 2 takes Discipline (47).
7-Dimension Radar Each axis = percentile rank in the active US fleet (higher = better)
Per-Dimension Percentile Breakdown
| Dimension | Sequoyah 2 | Vogtle 1 |
|---|---|---|
| Capacity Factor 5-year average capacity factor — total generation as a fraction of installed capacity. Higher is better; top operators sustain 92%+. |
8
80.4%
|
53
91.9%
|
| Forced Outage Days/yr 5-year forced outage days per year (annualised) — non-power days NOT explained by scheduled refueling. Lower is better. |
15
9.4d
|
59
2.6d
|
| B2B Avg Streak Average breaker-to-breaker continuous-operation days across this unit's qualifying B2B runs (lifetime). Higher is better; reflects sustained reliability. |
39
510d
|
30
506d
|
| Fuel Utilization Average in-cycle capacity factor (3-year). Fraction of each refueling cycle that produced full power. Higher = more efficient operator. | — | — |
| Refuel Duration 5-year median scheduled refueling outage duration in days (refuel-shaped outages, 14-90d). Lower = faster turnaround. |
30
36d
|
76
25d
|
| Startup Duration Robust mean days from first power post-refuel to sustained ≥95% power. Lower = faster ramp. | — | — |
| Scrams (5-year) Scrams per year, computed over the 5-year window (annualised so windows are comparable). Lower is better; reflects operating discipline and equipment reliability. |
47
0.4/yr
|
29
0.6/yr
|