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Comparing Vogtle 1 and Sequoyah 2. Vogtle 1 leads on the composite score (54/100, Mid Quartile), 23 points ahead of Sequoyah 2. Vogtle 1 takes Reliability (49). Vogtle 1 takes Efficiency (64). Vogtle 1 takes Discipline (50).
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%+. |
9
80.4%
|
56
92.2%
|
| Forced Outage Days/yr 5-year forced outage days per year (annualised) — non-power days NOT explained by scheduled refueling. Lower is better. |
14
9.4d
|
60
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. |
38
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. |
27
97.0%
|
53
98.1%
|
| Refuel Duration 5-year median scheduled refueling outage duration in days (refuel-shaped outages, 14-90d). Lower = faster turnaround. |
31
36d
|
76
25d
|
| Startup Duration Robust mean days from first power post-refuel to sustained ≥95% power. Lower = faster ramp. |
39
5.0d
|
71
3.6d
|
| 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. |
48
0.4/yr
|
29
0.6/yr
|