Quad Cities 2 - Status & History

Comprehensive reactor performance metrics, cycle analysis, and historical outage data.

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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.
Oct2025NovDecJan2026FebMarAprMayJunJulAugSepOnline: Sep 12, 2025 to Sep 27, 2025Reduced Power: Sep 28, 2025Online: Sep 29, 2025 to Dec 16, 2025Reduced Power: Dec 17, 2025Online: Dec 18, 2025 to Jan 9, 2026Reduced Power: Jan 10, 2026Online: Jan 11, 2026 to Feb 17, 2026Coastdown: Feb 18, 2026 to Mar 29, 2026Refueling Outage (Q2R28): Mar 30, 2026 to Apr 23, 2026Q2R28Power Ascension: Apr 24, 2026 to Apr 26, 2026Online: Apr 27, 2026 to May 1, 2026Power Ascension: May 2, 2026Online: May 3, 2026 to May 8, 2026Forced Outage: May 9, 2026 to May 16, 2026Power Ascension: May 17, 2026Online: May 18, 2026 to Jun 27, 2026Reduced Power: Jun 28, 2026 to Jun 29, 2026Online: Jun 30, 2026 to Sep 12, 2026Today
OnlineReduced PowerCoastdownPower AscensionRefueling OutageForced 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. Clean run (no forced outages since last refueling).
119
Current Run
days ✔
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Longest recorded period of continuous operation between outages (2018-04-07 to 2020-03-30).
723
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.
4
B2B Runs
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Lifetime capacity factor: average power level across all recorded days (100% = always at full power).
92.1%
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.
15.25 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.
14
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.
3
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.
100.0%
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: 88/100 (#2/93)2022: 72/100 (#19/92)2023: 45/100 (#54/92)2024: 57/100 (#30/92)2025: 45/100 (#54/92)2026: 51/100 (#40/93) ↑ +5.3 pts vs 2025
Compare Quad Cities 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

Quad Cities 2 has 43 outages plotted here, averaging 12 days each. The most recent, in May 2026, was a unplanned outage lasting 8 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, Quad Cities 2 takes about 5 days to climb from first power back to full power. That average is drawn from 13 startups on record, and the most recent took 3 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 Apr 25, 2026

81.7% remaining 10.0 FPD margin
Quad Cities 2 has an estimated 81.7% of its fuel left. Across its last 13 cycles, it has refueled with an average of 3.7% remaining.
Avg refuel: 3.7% Avg refuel (3yr): 0.0% Deepest burn: 0.0% (2018-04 → 2020-03) Most margin: 11.5% (2004-03 → 2006-03)
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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, Quad Cities 2 has run at about 92.1% of its rated capacity. Across the last 12 reported months it averaged 88.6%. 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 Quad Cities 2, 43 in all since 1999. Of those, 14 were scheduled refueling outages and 29 were unplanned or forced. The typical outage lasted about 12 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
Unscheduled
2026-05-09 2026-05-16 8 16d - -
Scheduled Q2R28
2026-03-30 2026-04-23 25 674d 2026-03-30 0d
Scram # 57141
2024-05-24 2024-05-25 2 44d - -
Scheduled Q2R27
2024-03-18 2024-04-10 24 218d 2024-03-17 +1d
Scram # 56676
2023-08-12 2023-08-13 2 88d - -
Unscheduled
2023-05-10 2023-05-16 7 185d - -
Scram # 56210
2022-11-05 2022-11-06 2 123d - -
Scram # 55975
2022-07-04 2022-07-05 2 72d - -
Scheduled Q2R26
2022-03-21 2022-04-23 34 707d 2022-03-21 0d
Scheduled Q2R25
2020-03-30 2020-04-13 15 723d 2020-03-30 0d
Scheduled Q2R24
2018-03-19 2018-04-07 20 220d 2018-03-19 0d
Unscheduled
2017-08-06 2017-08-11 6 486d - -
Scheduled Q2R23
2016-03-21 2016-04-07 18 685d 2016-03-21 0d
Scheduled # 49988 Q2R22
2014-04-01 2014-05-06 36 429d 2014-04-07 -6d
Unscheduled
2013-01-27 2013-01-27 1 282d - -
Scram # 47847
2012-04-19 2012-04-20 2 3d - -
Scheduled Q2R21
2012-03-19 2012-04-16 29 577d 2012-03-19 0d
Unscheduled
2010-08-18 2010-08-20 3 122d - -
Unscheduled
2010-04-16 2010-04-18 3 2d - -
Scheduled Q2R20
2010-03-15 2010-04-14 31 450d 2010-03-15 0d
Unscheduled
2008-12-13 2008-12-20 8 6d - -
Unscheduled
2008-12-06 2008-12-07 2 252d - -
Scheduled Q2R19
2008-03-03 2008-03-29 27 368d 2008-03-03 0d
Unscheduled
2007-02-28 2007-03-01 2 316d - -
Scheduled Q2R18
2006-03-25 2006-04-18 25 66d 2006-03-24 +1d
Unscheduled
2006-01-14 2006-01-18 5 13d - -
Unscheduled
2005-12-31 2006-01-01 2 229d - -
Unscheduled
2005-05-09 2005-05-16 8 408d - -
Scheduled Q2R17
2004-02-24 2004-03-27 33 241d 2004-02-24 0d
Unscheduled
2003-06-11 2003-06-28 18 32d - -
Unscheduled
2003-05-09 2003-05-10 2 19d - -
Unscheduled
2003-04-17 2003-04-20 4 270d - -
Unscheduled
2002-07-12 2002-07-21 10 97d - -
Unscheduled
2002-04-06 2002-04-06 1 5d - -
Unscheduled
2002-03-30 2002-04-01 3 26d - -
Scheduled Q2R16
2002-02-12 2002-03-04 21 170d 2002-02-12 0d
Unscheduled
2001-08-03 2001-08-26 24 138d - -
Unscheduled
2001-03-17 2001-03-18 2 241d - -
Unscheduled
2000-07-19 2000-07-19 1 56d - -
Unscheduled
2000-05-23 2000-05-24 2 17d - -
Unscheduled
2000-05-06 2000-05-06 1 86d - -
Scheduled Q2R15
2000-01-22 2000-02-10 20 328d 2000-01-22 0d
Unscheduled
1999-02-20 1999-02-28 9 - - -
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