Kewaunee - Status & History

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

Plant Info Outage History Daily Power Log Get alerts

Decommissioned

Permanently shut down on 2013-05-07. Outage statistics below reflect only the operating period. The final shutdown is not counted as an outage.
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This unit is permanently shut down (shutdown date: 2013-05-07).
Shut Down
2013-05-07
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Longest recorded period of continuous operation between outages (2009-10-22 to 2011-02-27).
493
Record Run
days
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Breaker-to-Breaker runs — continuous operation exceeding the cycle-adjusted threshold (448 days for this 18-month cycle 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).
86%
Capacity Factor
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Total number of scheduled refueling outages detected in the historical data. D&D shutdown period excluded.
9
Outages
since 2000
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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.
94.1%
Fuel Utilization
lifetime avg
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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

Kewaunee has 23 outages plotted here, averaging 26 days each. The most recent, in Apr 2012, was a scheduled refueling outage lasting 34 days.
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Days between consecutive scheduled refueling outage starts, showing operating cycle regularity. The purple dashed line marks the average cycle length. Most U.S. reactors operate on 18-month (547 day) or 24-month (730 day) cycles.

Cycle Length History

Between refueling outages, Kewaunee runs about 546 days, or roughly 18 months, per cycle. That average comes from 8 completed cycles, the most recent lasting 404 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, Kewaunee takes about 7 days to climb from first power back to full power. That average is drawn from 9 startups on record, and the most recent took 3 days.
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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, Kewaunee has run at about 86% of its rated capacity. Across the last 12 reported months it averaged 85.0%. 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 Kewaunee, 24 in all since 2000. Of those, 9 were scheduled refueling outages and 15 were unplanned or forced. The typical outage lasted about 27 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
2013-05-08 Decommissioned 1 (D&D) 364d - -
Scheduled
2012-04-06 2012-05-09 34 377d 2012-04-06 0d
Scheduled
2011-02-27 2011-03-26 28 493d 2011-03-12 -13d
Scheduled
2009-09-26 2009-10-22 27 159d 2009-09-26 0d
Unscheduled
2009-04-17 2009-04-20 4 343d - -
Scheduled
2008-03-29 2008-05-09 42 169d 2008-03-29 0d
Unscheduled
2007-10-05 2007-10-12 8 209d - -
Unscheduled
2007-02-28 2007-03-10 11 45d - -
Unscheduled
2007-01-13 2007-01-14 2 60d - -
Unscheduled
2006-11-11 2006-11-14 4 10d - -
Unscheduled
2006-10-31 2006-11-01 2 6d - -
Scheduled
2006-09-02 2006-10-25 54 103d 2006-09-02 0d
Unscheduled
2006-04-27 2006-05-22 26 149d - -
Unscheduled
2005-11-29 2005-11-29 1 3d - -
Unscheduled
2005-11-22 2005-11-26 5 144d - -
Unscheduled
2005-02-21 2005-07-01 131 80d - -
Scheduled
2004-10-09 2004-12-03 56 252d 2004-10-08 +1d
Unscheduled
2004-01-17 2004-01-31 15 252d - -
Scheduled
2003-04-05 2003-05-10 36 325d 2003-04-05 0d
Unscheduled
2002-05-06 2002-05-15 10 156d - -
Scheduled
2001-09-24 2001-12-01 69 95d 2001-09-24 0d
Unscheduled
2001-06-20 2001-06-21 2 378d - -
Unscheduled
2000-06-07 2000-06-07 1 7d - -
Scheduled
2000-04-22 2000-05-31 40 - 2000-04-22 0d
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