Saint Lucie 2 - Status & History

Comprehensive reactor performance metrics, cycle analysis, and historical outage data.
Data refreshed 4.3h ago Rx Status: Sep 17, 2026 at 7:49 AM (M-F)

Plant Info Outage History Daily Power Log Get alerts

Reactor Status Timeline

Online NRC data, Mon to Fri ? Actual daily reactor status from NRC reports (Mon to Fri) and the current state. What is coming -- the utility's published Scheduled outage and NukeWorker's model Projection -- is part of a subscription. Colored by status. How far ahead you can see depends on your plan.
Oct2025NovDecJan2026FebMarAprMayJunJulAugSepOctOnline: Sep 17, 2025 to Apr 14, 2026Coastdown: Apr 15, 2026 to Apr 17, 2026Refueling Outage (SL2-29): Apr 18, 2026 to Jun 4, 2026SL2-29Power Ascension: Jun 5, 2026 to Jun 18, 2026Online: Jun 19, 2026 to Aug 7, 2026Reduced Power: Aug 8, 2026Online: Aug 9, 2026 to Sep 17, 2026Today
OnlineReduced PowerCoastdownPower AscensionRefueling Outage
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Composite Operational Excellence Score (0-100) — average percentile rank across 7 dimensions in three sub-scores: Reliability (capacity factor, forced outage days, B2B avg streak), Efficiency (fuel utilization, refuel duration), and Discipline (startup duration, scram count). 5-year window. Higher = more operationally excellent. Click to see the full breakdown.
   
Excellence
ranked of 93
Subscribers
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Days of continuous operation since the last outage ended (Started 2026-06-04). Clean run (no forced outages since last refueling).
105
Current Run
days ✔
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Longest recorded period of continuous operation between outages (2024-10-13 to 2026-04-18).
552
Record Run
days
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Breaker-to-Breaker runs — continuous operation exceeding the cycle-adjusted threshold set for this unit with no trips to 0% power.
2
B2B Runs
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Lifetime capacity factor: average power level across all recorded days (100% = always at full power).
87.3%
Capacity Factor
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Net electricity actually generated over the most recent 12 months reported by the U.S. EIA (Form EIA-923), summed across every unit at this plant. Authoritative actuals, not an estimate.
15.12 TWh
Net Generation
EIA-923 · 12 mo to 2026-06 · plant total
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Total number of scheduled refueling outages detected in the historical data.
18
Outages
since 1999
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Average time from first power generation (>0%) to sustained full power (≥95% for 2+ days) across the last 3 scheduled outages. Click to compare against the fleet on the Operator Efficiency Leaderboard.
11
Avg Startup
days (last 3)
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Average fuel utilization — percent of the designed fuel cycle that this unit consumes before refueling, derived from the historical burn-down trajectory. Higher = more efficient operator (refuels with less margin remaining; closer to coastdown). Computed as 100% minus the unit's average refuel-point fuel %, using the last 3 years where available, otherwise lifetime average. Click to compare against the fleet on the Operator Efficiency Leaderboard.
97.2%
Fuel Utilization
3yr avg
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NukeWorker's Operational Excellence Score is a composite 0–100 ranking of every active US nuclear unit across 7 measured performance metrics, grouped into three sub-scores:
• Reliability — capacity factor, forced outage days, B2B avg streak
• Efficiency — fuel utilization, refuel duration
• Discipline — startup duration, scram count
Each unit's metric is converted to a percentile across the active fleet. Sub-score = average of its components; composite = average of the three sub-scores. Use the time-window toggle below to switch between 3yr / 5yr / lifetime.
Time window — change how far back we look
5-yr trend: 2021: 37/100 (#67/93)2022: 41/100 (#61/92)2023: 53/100 (#42/92)2024: 32/100 (#74/92)2025: 36/100 (#70/92)2026: 29/100 (#81/93) ↓ -7.2 pts vs 2025
Compare Saint Lucie 2 head-to-head with up to 3 other units. Compare now
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Duration of each outage in days, shown chronologically. Green bars are scheduled refueling outages, red bars are forced/unscheduled. The orange dashed line marks the average duration. Extended outages (>180 days) and D&D periods are excluded.

Outage Duration Trend

Saint Lucie 2 has 61 outages plotted here, averaging 19 days each. The most recent, in Apr 2026, was a scheduled refueling outage lasting 48 days.
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Time in days from first power generation (>0%) to sustained full power (≥95% for 2+ consecutive days) after each scheduled refueling outage. The dashed line marks the average. Includes startup testing holds and power dips.

Startup Duration Trend

After a refueling outage, Saint Lucie 2 takes about 4 days to climb from first power back to full power. That average is drawn from 18 startups on record, and the most recent took 14 days.
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Estimated fuel remaining in the current cycle, expressed as a percentage of the unit's typical cycle. Starts at 100% when the unit returns to power post-refuel and drops as full-power-days are burned. Days at reduced power burn fuel proportionally — so a unit with significant downtime (high burn deficit) drops slower and ends up with MORE fuel left than its calendar position would suggest. Coastdown threshold around 15%. Toggle to overlay past cycles on a normalized "days into cycle" axis to see how aggressively this unit historically burns down before refuel.

Fuel Burn Down Cycle since Jun 5, 2026

81.6% remaining 6.3 FPD margin
Saint Lucie 2 has an estimated 81.6% of its fuel left. Across its last 17 cycles, it has refueled with an average of 8.5% remaining.
Avg refuel: 8.5% Avg refuel (3yr): 2.8% Deepest burn: 0.0% (2000-05 → 2001-11) Most margin: 21.0% (2005-02 → 2006-04)
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Monthly capacity factor with outage events overlaid as red bands. Green bars show average power level per month. Toggle to Daily view for raw daily data.

Power History

Over its operating life, Saint Lucie 2 has run at about 87.3% of its rated capacity. Across the last 12 reported months it averaged 84.7%. On the chart, flat stretches near the top are full-power running and drops to zero are outages.
This table logs every recorded outage for Saint Lucie 2, 61 in all since 1999. Of those, 18 were scheduled refueling outages and 43 were unplanned or forced. The typical outage lasted about 19 days. Where the Scheduled column shows (Model), the date is a NukeWorker projection because the utility had not published one.
Type ⇅ Actual Start ⇅ Actual End ⇅ Duration ⇅ Days Online ⇅ Scheduled Delta
Scheduled SL2-29
2026-04-18 2026-06-04 48 552d 2026-04-04 +14d
Scheduled SL2-28
2024-08-31 2024-10-13 44 69d 2024-08-31 0d
Scram # 57177
2024-06-18 2024-06-23 6 12d - -
Scram # 57161
2024-06-05 2024-06-06 2 147d - -
Unscheduled
2024-01-04 2024-01-10 7 16d - -
Unscheduled
2023-12-10 2023-12-19 10 267d - -
Scheduled SL2-27
2023-02-18 2023-03-18 29 394d 2023-02-18 0d
Unscheduled
2022-01-07 2022-01-20 14 100d - -
Scheduled SL2-26
2021-08-28 2021-09-29 33 218d 2021-08-28 0d
Scram # 55078
2021-01-21 2021-01-22 2 309d - -
Scheduled SL2-25
2020-02-17 2020-03-18 31 488d 2020-02-17 0d
Scram # 53665
2018-10-13 2018-10-17 5 11d - -
Scheduled SL2-24
2018-08-27 2018-10-02 37 303d 2018-08-27 0d
Scram # 53036
2017-10-26 2017-10-28 3 216d - -
Scheduled SL2-23
2017-02-20 2017-03-24 33 130d 2017-02-20 0d
Unscheduled
2016-10-07 2016-10-13 7 348d - -
Scheduled SL2-22
2015-09-08 2015-10-25 48 140d 2015-09-06 +2d
Unscheduled
2015-04-12 2015-04-21 10 53d - -
Unscheduled
2015-02-16 2015-02-18 3 90d - -
Scram # 50607
2014-11-13 2014-11-18 6 100d - -
Unscheduled
2014-07-26 2014-08-05 11 95d - -
Scheduled SL2-21
2014-03-03 2014-04-22 51 107d 2014-03-03 0d
Scram # 49536
2013-11-15 2013-11-16 2 166d - -
Scram # 49082
2013-06-01 2013-06-02 2 194d - -
Scheduled SL2-20SGR/Major
2012-08-06 2012-11-19 106 86d 2012-08-05 +1d
Scram # 47915
2012-05-11 2012-05-12 2 340d - -
Scram # 46928
2011-06-06 2011-06-06 1 20d - -
Unscheduled
2011-05-16 2011-05-17 2 12d - -
Scheduled SL2-19SGR/Major
2011-01-03 2011-05-04 122 257d 2011-01-05 -2d
Unscheduled
2010-04-16 2010-04-21 6 199d - -
Unscheduled
2009-09-10 2009-09-29 20 45d - -
Unscheduled
2009-07-13 2009-07-27 15 31d - -
Scheduled SL2-18
2009-04-27 2009-06-12 47 24d 2009-04-27 0d
Unscheduled
2009-04-02 2009-04-03 2 298d - -
Unscheduled
2008-06-08 2008-06-08 1 2d - -
Unscheduled
2008-06-05 2008-06-06 2 118d - -
Unscheduled
2008-01-30 2008-02-08 10 26d - -
Scheduled SL2-17SGR/Major
2007-10-01 2008-01-04 96 32d 2007-10-01 0d
Unscheduled
2007-08-19 2007-08-30 12 429d - -
Unscheduled
2006-06-16 2006-06-16 1 5d - -
Scheduled SL2-16
2006-04-24 2006-06-11 49 91d 2006-04-23 +1d
Unscheduled
2006-01-21 2006-01-23 3 86d - -
Unscheduled
2005-10-24 2005-10-27 4 73d - -
Unscheduled
2005-08-12 2005-08-12 1 179d - -
Scheduled SL2-15
2005-01-06 2005-02-14 40 5d 2004-10-19 (Model) +79d (Model)
Unscheduled
2004-12-28 2005-01-01 5 2d - -
Unscheduled
2004-12-26 2004-12-26 1 83d - -
Unscheduled
2004-09-26 2004-10-04 9 9d - -
Unscheduled
2004-09-04 2004-09-17 14 251d - -
Unscheduled
2003-12-27 2003-12-28 2 4d - -
Unscheduled
2003-12-21 2003-12-23 3 16d - -
Unscheduled
2003-12-05 2003-12-05 1 172d - -
Unscheduled
2003-06-11 2003-06-16 6 3d - -
Unscheduled
2003-06-07 2003-06-08 2 2d - -
Scheduled SL2-14
2003-04-21 2003-06-05 46 17d 2003-04-21 0d
Unscheduled
2003-04-02 2003-04-04 3 460d - -
Unscheduled Startup Hold
2001-12-26 2001-12-28 3 6d - -
Scheduled SL2-13
2001-11-26 2001-12-20 25 254d 2001-11-26 0d
Unscheduled
2001-03-15 2001-03-17 3 302d - -
Scheduled SL2-12
2000-04-17 2000-05-17 31 312d 2000-04-17 0d
Unscheduled
1999-06-04 1999-06-10 7 - - -
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