D.C. Cook 2

Online · 100% power

Indiana Michigan Power·Bridgman, MI·PWR·1,168 MWe

Data refreshed 13.8h ago Rx Status: Oct 23, 2026 at 5:36 AM (M-F)

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.
Nov2025DecJan2026FebMarAprMayJunJulAugSepOctNovRefueling Outage: Oct 24, 2025Power Ascension: Oct 25, 2025 to Oct 28, 2025Online: Oct 29, 2025 to Jan 17, 2026Scram: Jan 18, 2026 to Jan 20, 2026Reduced Power: Jan 21, 2026Online: Jan 22, 2026 to Oct 24, 2026Scram (reactor trip): Jan 18, 2026Today
OnlineReduced PowerPower AscensionRefueling OutageScram⚡Scram (reactor trip)
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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
Rank locked · 93 units
Subscribers
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Days of continuous operation since the last outage ended (Started 2026-01-20). Clean run (no forced outages since last refueling).
277
Current Run
days ✔
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Longest recorded period of continuous operation between outages (2022-11-11 to 2024-03-23).
498
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).
83.8%
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.
18.51 TWh
Net Generation
EIA-923 · 12 mo to 2026-07 · plant total
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Total number of scheduled refueling outages detected in the historical data.
17
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.
4
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.
98.9%
Fuel Utilization
3yr avg

Reactor Status

Current Reactor Status Oct 23, 2026

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Current power output from NRC daily reactor status reports, updated Monday through Friday, except federal holidays. The gauge shows power level as a percentage of rated capacity. The sparkline shows the last 14 days of power history. Click to view the full unit dashboard.
D.C. Cook 2 is Online at 100% of rated power as of Oct 23, 2026. Over the last 14 reported days it has run between 100% and 100% power.
D.C. Cook 2 is Online Get alerts
100
PERCENT
0 200 400 600 800 1000 1,168 RATED CAPACITY (1,168 MWe) 1,168 MWe
Current:
1,168 MWe
Powering 934,400 homes
Rated Capacity:
1,168 MWe
934,400 homes
Report Age: 1 day ago
14-Day Power History
Oct 10 Oct 23

Capacity Factor (365-Day)

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100%
Current
98.2%
365-Day Avg
#37
of 94 plants
Min: 0% Max: 100% 8 days <80%

Outage Days by Year

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Total days spent in outage each year, split by scheduled refueling (blue) and forced/unplanned (red). Lower totals indicate better reliability and outage execution. Hover for details.
Across its recorded history, D.C. Cook 2 has spent 794 days in scheduled refueling outages and 184 days in forced or unplanned outages. Taller bars mark the years with the most downtime.
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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

D.C. Cook 2 has 49 outages plotted here, averaging 20 days each. The most recent, in Jan 2026, was a unplanned outage lasting 3 days.
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Scheduled refueling outage durations over time. Green bars are at or below this unit's average, amber up to 30% above it, red beyond that. The dashed line is the average. Shorter outages mean better execution.

Refueling Duration Trend

D.C. Cook 2 has completed 17 scheduled refueling outages on record, averaging 47 days each. The most recent, in Sep 2025, ran 35 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, D.C. Cook 2 takes about 6 days to climb from first power back to full power. That average is drawn from 17 startups on record, and the most recent took 3 days.
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Daily reactor power over the 120 days before each scheduled refueling outage, one line per refueling, lined up on the day the outage began. A coastdown is the slow decline as the fuel runs out near the end of a cycle. The highlighted line is the most recent refueling and fainter lines are older. Counts and medians cover coastdowns of a week or longer. A shutdown straight from full power, with no decline ahead of it, is what a forced outage looks like.

Coastdown Before Refueling

4 of 17 refuelings 10 days median 70% power at shutdown 2.8% per day
D.C. Cook 2 coasted down for a week or longer before 4 of its 17 refuelings on record. Those coastdowns ran a median of 10 days and ended near 70% power. The most recent refueling, in Sep 2025, began with no extended coastdown.
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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 Oct 25, 2025

28.0% remaining 4.6 FPD margin
D.C. Cook 2 has an estimated 28.0% of its fuel left. Across its last 16 cycles, it has refueled with an average of 4.8% remaining.
Avg refuel: 4.8% Avg refuel (3yr): 1.1% Deepest burn: 0.0% (2009-05 → 2010-10) Most margin: 24.4% (2002-03 → 2003-04)
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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, D.C. Cook 2 has run at about 83.8% of its rated capacity. Across the last 12 reported months it averaged 99.0%. On the chart, green stretches near the top are full-power running, amber marks reduced power (50 to 89%), and red drops toward zero are outages.
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Estimated reactivity remaining in D.C. Cook 2's current fuel cycle, shown as a stylized fuel rod that drains as the cycle progresses. The cycle starts when the unit returns to power after its most recent refueling outage, and the gauge represents the fraction of that cycle's typical effective full-power days (EFPD) still available. Days at less than 100% power burn fuel proportionally — so a unit with significant downtime (high burn deficit) drains slower and ends with MORE reactivity left, giving operators margin to coast down (extend the cycle by reducing power) instead of refueling on the calendar. The dashed red line near the bottom marks the rough industry coastdown threshold (~15% remaining). Cycle target is the unit's median recent cycle length. Source: NRC daily reactor status reports cross-referenced against scheduled refuel outage history.

Fuel Burn Down Cycle since Oct 25, 2025

D.C. Cook 2 is 363 days into its current fuel cycle with an estimated 28.0% of its fuel left. Its typical cycle runs about 498 days.
Fresh — 100%
25% 50% 75% COASTDOWN ~3% DAY 0 DAY 498
Refuel — 0%
28.0% remaining
Approaching refuel
Cycle progress
363 / 498 days
EFPD remaining
140 days
Effective burn
358 EFPD
Burn deficit
4.6 FPD
D.C. Cook 2 is approaching refuel. Coastdown decisions are being weighed; the next outage is likely within months.

Outage History & Daily Power Log

This table logs every recorded outage for D.C. Cook 2, 50 in all since 1999. Of those, 17 were scheduled refueling outages, 1 was planned maintenance and 32 were unplanned or forced. The typical outage lasted about 30 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
Scram # 58121 Auto
2026-01-18 2026-01-20 3 86d - -
Scheduled U2C29
2025-09-20 2025-10-24 35 446d 2025-09-20 0d
Unscheduled
2024-06-28 2024-07-01 4 43d - -
Scram # 57128 Manual
2024-05-16 2024-05-16 1 13d - -
Scheduled # 57045 Auto U2C28
2024-03-23 2024-05-03 42 498d 2024-03-22 +1d
Scram # 56216 Auto
2022-11-11 2022-11-11 1 3d - -
Scheduled U2C27
2022-10-01 2022-11-08 39 451d 2022-10-01 0d
Scram # 55322 Manual
2021-06-23 2021-07-07 15 35d - -
Scheduled U2C26
2021-04-17 2021-05-19 33 186d 2021-04-17 0d
Scram # 54944 Auto
2020-10-12 2020-10-13 2 35d - -
Scram # 54885 Manual
2020-09-05 2020-09-07 3 118d - -
Unscheduled
2020-05-02 2020-05-10 9 166d - -
Scheduled U2C25
2019-10-03 2019-11-18 47 71d 2019-10-02 +1d
Scram # 54176 Manual
2019-07-22 2019-07-24 3 438d - -
Scheduled U2C24
2018-03-01 2018-05-10 71 424d 2018-03-29 -28d
Scheduled U2C23SGR/Major
2016-10-05 2017-01-01 89 85d 2016-10-05 0d
Scram # 52065 Manual
2016-07-06 2016-07-12 7 436d - -
Scheduled U2C22
2015-03-25 2015-04-27 34 135d 2015-03-24 +1d
Scram # 50587 Manual
2014-11-01 2014-11-10 10 355d - -
Scheduled U2C21
2013-10-02 2013-11-11 41 64d 2013-10-02 0d
Scram # 49220 Manual
2013-07-29 2013-07-30 2 454d - -
Scram # 47881 Auto
2012-05-01 2012-05-01 1 3d - -
Scheduled U2C20
2012-03-21 2012-04-28 39 473d 2012-03-12 +9d
Scheduled U2C19
2010-10-06 2010-12-04 60 425d 2010-10-06 0d
Unscheduled
2009-07-27 2009-08-07 12 89d - -
Scheduled U2C18
2009-03-25 2009-04-29 36 218d 2009-03-02 +23d
Unscheduled
2008-08-18 2008-08-19 2 287d - -
Scheduled U2C17
2007-09-15 2007-11-05 52 497d 2007-09-15 0d
Scheduled U2C16
2006-03-25 2006-05-06 43 135d 2006-03-24 +1d
Unscheduled
2005-11-08 2005-11-10 3 46d - -
Unscheduled
2005-09-23 2005-09-23 1 244d - -
Unscheduled
2005-01-22 2005-01-22 1 55d - -
Unscheduled
2004-11-23 2004-11-28 6 15d - -
Scheduled U2C15
2004-10-02 2004-11-08 38 173d 2004-10-01 +1d
Unscheduled
2004-04-09 2004-04-12 4 7d - -
Unscheduled
2004-03-30 2004-04-02 4 87d - -
Unscheduled
2003-12-31 2004-01-03 4 125d - -
Unscheduled
2003-08-14 2003-08-28 15 56d - -
Scheduled U2C14
2003-04-24 2003-06-19 57 70d 2003-04-24 0d
Unscheduled
2003-02-06 2003-02-13 8 8d - -
Unscheduled
2003-01-27 2003-01-29 3 178d - -
Unscheduled
2002-07-28 2002-08-02 6 5d - -
Unscheduled
2002-07-22 2002-07-23 2 51d - -
Unscheduled
2002-05-26 2002-06-01 7 11d - -
Unscheduled
2002-05-13 2002-05-15 3 77d - -
Scheduled U2C13
2002-01-19 2002-02-25 38 102d - -
Unscheduled
2001-10-08 2001-10-09 2 2d - -
Planned Mid-Cycle Planned
2001-08-31 2001-10-06 37 217d - -
Unscheduled
2001-01-24 2001-01-26 3 216d - -
Unscheduled Ext. Shutdown
1999-01-01 2000-06-22 539 - - -
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