NukeGryd
The Operating Record

Reliability Board

47 operating reactors in PJM, Southern, ISO-NE, CAISO, SRP, scored on how they actually run and ranked against each other. Built from 27 years of daily reactor records.
Filtered to PJM Southern ISO-NE CAISO SRP Show all markets
See how every reactor actually runs Individual · $165/mo

One 0-100 score per unit, with sub-scores for reliability, efficiency and discipline, ranked against the fleet and against comparable units rather than against the whole fleet.

  • 47 units scored and ranked
  • Capacity factor and forced-outage days
  • Breaker-to-breaker streaks
  • Ranked against comparable units, not the whole fleet

Fleet Ranking · PJM + 4 more

# Unit Market MW Reactor type Operating record Individual
· Beaver Valley 1 PJM 907 PWR █████
· Beaver Valley 2 PJM 901 PWR █████
· Braidwood 1 PJM 1,183 PWR █████
· Braidwood 2 PJM 1,152 PWR █████
· Byron 1 PJM 1,164 PWR █████
· Byron 2 PJM 1,136 PWR █████
· Calvert Cliffs 1 PJM 884 PWR █████
· Calvert Cliffs 2 PJM 861 PWR █████
· D.C. Cook 1 PJM 1,009 PWR █████
· D.C. Cook 2 PJM 1,168 PWR █████
· Davis-Besse PJM 894 PWR █████
· Diablo Canyon 1 CAISO 1,122 PWR █████
· Diablo Canyon 2 CAISO 1,118 PWR █████
· Dresden 2 PJM 902 BWR █████
· Dresden 3 PJM 895 BWR █████
· Farley 1 Southern 895 PWR █████
· Farley 2 Southern 896 PWR █████
· Hatch 1 Southern 876 BWR █████
· Hatch 2 Southern 883 BWR █████
· Hope Creek 1 PJM 1,172 BWR █████
· LaSalle 1 PJM 1,131 BWR █████
· LaSalle 2 PJM 1,134 BWR █████
· Limerick 1 PJM 1,120 BWR █████
· Limerick 2 PJM 1,122 BWR █████
· Millstone 2 ISO-NE 863 PWR █████
· Millstone 3 ISO-NE 1,243 PWR █████
· North Anna 1 PJM 948 PWR █████
· North Anna 2 PJM 943 PWR █████
· Palo Verde 1 SRP 1,311 PWR █████
· Palo Verde 2 SRP 1,314 PWR █████
· Palo Verde 3 SRP 1,312 PWR █████
· Peach Bottom 2 PJM 1,265 BWR █████
· Peach Bottom 3 PJM 1,285 BWR █████
· Perry 1 PJM 1,240 BWR █████
· Quad Cities 1 PJM 908 BWR █████
· Quad Cities 2 PJM 911 BWR █████
· Salem 1 PJM 1,146 PWR █████
· Salem 2 PJM 1,142 PWR █████
· Seabrook 1 ISO-NE 1,246 PWR █████
· Surry 1 PJM 838 PWR █████
· Surry 2 PJM 838 PWR █████
· Susquehanna 1 PJM 1,247 BWR █████
· Susquehanna 2 PJM 1,247 BWR █████
· Vogtle 1 Southern 1,150 PWR █████
· Vogtle 2 Southern 1,152 PWR █████
· Vogtle 3 Southern 1,114 AP1000 █████
· Vogtle 4 Southern 1,114 AP1000 █████
Rel / Eff / Disc are the three sub-scores behind the composite: whether a unit stays on line, whether it uses fuel and outage time well, and whether it comes back cleanly. Scores recomputed today; the underlying daily reactor record updates every morning. Click any column heading to re-rank.

By Market

how a reactor in each market typically behaves
MarketUnitsGWAvg score Forced d / unitB2B championsAvg overrun BestWeakest
PJM 31 32.7 ██ ██ ██ ██ ██ ██
ISO-NE 3 3.4 ██ ██ ██ ██ ██ ██
CAISO 2 2.2 ██ ██ ██ ██ ██ ██
Southern Non-ISO 8 8.1 ██ ██ ██ ██ ██ ██
SRP Non-ISO 3 3.9 ██ ██ ██ ██ ██ ██
Averages are unweighted across the units in each market. Capacity weighting would let two large reactors answer for a whole market; this column answers "how does a unit here typically behave", which is the question the heading asks.
A good record is not the same as a firm date Pro · $499/mo

The reliability score says how a unit behaves. The risk radar says what that behavior is about to cost: projected overrun days on every upcoming outage, and the megawatt-days the market has not priced.

  • Projected overrun per unit
  • Forced-outage exposure screen
  • MW-days at risk by market
  • Scored against its own history