Callaway

Refueling Outage · Day 30

Ameren Missouri·Fulton, MO·PWR·1,190 MWe

Outage History Daily Power Log Get alerts

Reactor Status Timeline

Refueling Outage · Day 30 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.
Nov2025DecJan2026FebMarAprMayJunJulAugSepOctNovOnline: Oct 25, 2025 to Nov 12, 2025Forced Outage: Nov 13, 2025 to Nov 29, 2025Power Ascension: Nov 30, 2025 to Dec 3, 2025Online: Dec 4, 2025 to Sep 25, 2026Refueling Outage (RF28): Sep 26, 2026 to Oct 25, 2026RF28Today
OnlinePower 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
Rank locked · 93 units
Subscribers
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Days of continuous operation since the last outage ended. Has forced outage(s) since last refueling.
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Current Run
offline
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Longest recorded period of continuous operation between outages (2007-05-08 to 2008-10-11).
522
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.
5
B2B Runs
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Lifetime capacity factor: average power level across all recorded days (100% = always at full power).
85.6%
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). Authoritative actuals, not an estimate.
10.09 TWh
Net Generation
EIA-923 · 12 mo to 2026-07
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Total number of scheduled refueling outages detected in the historical data.
19
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.
3.3
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.
93.6%
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.
Callaway is OFFLINE (14 Days) at 0% of rated power as of Oct 23, 2026. This outage is RFO RF28. Over the last 14 reported days it has run between 0% and 0% power.
Callaway is OFFLINE (14 Days) Get alerts
0
PERCENT
0 200 400 600 800 1000 1,190 RATED CAPACITY (1,190 MWe) 0 MWe
Current:
0 MWe
Powering 0 homes
Rated Capacity:
1,190 MWe
952,000 homes
Report Age: 2 days ago
14-Day Power History
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Oct 10 Oct 23

Capacity Factor (365-Day)

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0%
Current
87%
365-Day Avg
#39
of 94 plants
Min: 0% Max: 100% 49 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, Callaway has spent 947 days in scheduled refueling outages and 173 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

Callaway has 50 outages plotted here, averaging 22 days each. The most recent, in Sep 2026, was a scheduled refueling outage lasting 28 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

Callaway has completed 19 scheduled refueling outages on record, averaging 50 days each. The most recent, in Sep 2026, ran 28 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, Callaway takes about 5 days to climb from first power back to full power. That average is drawn from 17 startups on record, and the most recent took 4 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

5 of 19 refuelings 13 days median 83% power at shutdown 0.7% per day
Callaway coasted down for a week or longer before 5 of its 19 refuelings on record. Those coastdowns ran a median of 13 days and ended near 83% power. The most recent refueling, in Sep 2026, began with no extended coastdown.
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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, Callaway has run at about 85.6% of its rated capacity. Across the last 12 reported months it averaged 84.9%. 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.

Outage History & Daily Power Log

This table logs every recorded outage for Callaway, 51 in all since 1999. Of those, 19 were scheduled refueling outages and 32 were unplanned or forced. The typical outage lasted about 26 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 RF28
2026-09-26 In Outage 28+ 301d 2026-09-26 0d
Unscheduled
2025-11-13 2025-11-29 17 131d - -
Scheduled RF27SGR/Major
2025-03-29 2025-07-05 99 405d 2025-04-11 -13d
Scram # 56968 Auto
2024-02-15 2024-02-18 4 101d - -
Scheduled RF26
2023-09-30 2023-11-06 38 145d 2023-09-30 0d
Unscheduled
2023-04-28 2023-05-08 11 335d - -
Scheduled RF25
2022-04-04 2022-05-28 55 84d 2022-04-04 0d
Scram # 55698 Auto
2022-01-08 2022-01-10 3 159d - -
Scram # 55049 Auto
2020-12-25 2021-08-02 221 5d - -
Scheduled # 54916 Auto RF24
2020-09-27 2020-12-20 85 174d 2020-10-03 -6d
Scram # 54639 Auto
2020-04-04 2020-04-06 3 323d - -
Scheduled RF23
2019-04-01 2019-05-17 47 470d 2019-04-01 0d
Scheduled RF22
2017-10-07 2017-12-17 72 516d 2017-10-06 +1d
Scheduled RF21
2016-04-03 2016-05-09 37 235d 2016-04-08 -5d
Scram # 51308 Auto
2015-08-11 2015-08-12 2 17d - -
Unscheduled
2015-07-24 2015-07-25 2 231d - -
Scram # 50650 Auto
2014-12-03 2014-12-05 3 12d - -
Scheduled RF20
2014-10-12 2014-11-21 41 422d 2014-10-04 +8d
Scram # 49219 Auto
2013-07-27 2013-08-16 21 61d - -
Scheduled RF19
2013-04-09 2013-05-27 49 502d 2013-04-06 +3d
Scheduled RF18
2011-10-16 2011-11-24 40 492d 2011-10-15 +1d
Scheduled RF17
2010-04-18 2010-06-11 55 413d 2010-04-17 +1d
Unscheduled
2009-02-22 2009-03-01 8 2d - -
Unscheduled
2009-02-20 2009-02-20 1 60d - -
Unscheduled
2008-12-15 2008-12-22 8 2d - -
Unscheduled
2008-12-12 2008-12-13 2 30d - -
Unscheduled
2008-11-12 2008-11-12 1 6d - -
Scheduled RF16
2008-10-11 2008-11-06 27 522d 2008-10-11 0d
Scheduled RF15
2007-04-02 2007-05-08 37 21d 2007-04-01 +1d
Unscheduled
2007-03-10 2007-03-12 3 281d - -
Unscheduled
2006-05-18 2006-06-02 16 6d - -
Unscheduled
2006-05-12 2006-05-12 1 176d - -
Scheduled RF14
2005-09-17 2005-11-17 62 91d 2005-09-16 +1d
Unscheduled
2005-06-17 2005-06-18 2 77d - -
Unscheduled
2005-03-27 2005-04-01 6 66d - -
Unscheduled
2005-01-20 2005-01-20 1 223d - -
Scheduled RF13
2004-04-11 2004-06-11 62 54d 2004-04-10 +1d
Unscheduled
2004-02-16 2004-02-17 2 2d - -
Unscheduled
2004-02-04 2004-02-14 11 7d - -
Unscheduled
2004-01-28 2004-01-28 1 96d - -
Unscheduled
2003-10-22 2003-10-24 3 203d - -
Unscheduled
2003-03-23 2003-04-02 11 96d - -
Unscheduled
2002-12-15 2002-12-17 3 20d - -
Scheduled RF12
2002-10-23 2002-11-25 34 250d 2002-10-23 0d
Unscheduled
2002-02-01 2002-02-15 15 57d - -
Unscheduled
2001-12-04 2001-12-06 3 197d - -
Scheduled RF11
2001-04-07 2001-05-21 45 27d 2001-04-07 0d
Unscheduled
2001-03-10 2001-03-11 2 469d - -
Unscheduled
1999-11-27 1999-11-27 1 23d - -
Scheduled RF10
1999-10-02 1999-11-04 34 46d 1999-10-02 0d
Unscheduled
1999-08-12 1999-08-17 6 - - -
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