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Harris 1 - Status & History

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

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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

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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

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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

Scheduled
2025-10-04 2025-11-02 30 490d 2025-10-04 0d
Scram # 57155
2024-05-31 2024-06-01 2 19d - -
Scheduled
2024-04-10 2024-05-12 33 525d 2024-04-12 -2d
Scheduled
2022-10-08 2022-11-02 26 40d 2022-10-08 0d
Scram # 56075
2022-08-28 2022-08-29 2 120d - -
Scram # 55868
2022-04-29 2022-04-30 2 326d - -
Unscheduled
2021-06-05 2021-06-07 3 21d - -
Unscheduled
2021-05-15 2021-05-15 1 2d - -
Scheduled
2021-04-24 2021-05-13 20 124d 2021-04-24 0d
Scram # 55038
2020-12-17 2020-12-21 5 124d - -
Scram # 54834
2020-08-14 2020-08-15 2 143d - -
Scram # 54599
2020-03-24 2020-03-24 1 128d - -
Scheduled
2019-10-12 2019-11-17 37 521d 2019-10-12 0d
Scheduled
2018-04-07 2018-05-09 33 80d 2018-04-07 0d
Unscheduled
2018-01-15 2018-01-17 3 83d - -
Unscheduled
2017-10-23 2017-10-24 2 348d - -
Scheduled
2016-10-10 2016-11-09 31 2d 2016-10-08 +2d
Scram # 52289
2016-10-08 2016-10-08 1 512d - -
Scheduled
2015-04-02 2015-05-15 44 316d 2015-03-28 +5d
Unscheduled
2014-05-16 2014-05-21 6 115d - -
Scram # 49742
2014-01-19 2014-01-21 3 40d - -
Scheduled
2013-11-09 2013-12-10 32 156d 2013-11-02 +7d
Unscheduled
2013-05-16 2013-06-06 22 344d - -
Scheduled
2012-04-21 2012-06-06 47 528d 2012-04-21 0d
Scheduled
2010-10-02 2010-11-10 40 316d 2010-10-02 0d
Unscheduled
2009-11-16 2009-11-20 5 191d - -
Scheduled
2009-04-18 2009-05-09 22 241d 2009-04-18 0d
Unscheduled
2008-08-11 2008-08-20 10 294d - -
Scheduled
2007-09-29 2007-10-22 24 373d 2007-09-29 0d
Unscheduled
2006-09-20 2006-09-21 2 124d - -
Unscheduled
2006-05-19 2006-05-19 1 4d - -
Scheduled
2006-04-09 2006-05-15 37 342d 2006-04-08 +1d
Unscheduled
2005-05-01 2005-05-02 2 166d - -
Unscheduled
2004-11-09 2004-11-16 8 2d - -
Scheduled
2004-10-16 2004-11-07 23 150d 2004-10-15 +1d
Unscheduled
2004-05-07 2004-05-19 13 263d - -
Unscheduled
2003-08-18 2003-08-18 1 64d - -
Unscheduled
2003-06-15 2003-06-15 1 27d - -
Unscheduled
2003-05-19 2003-05-19 1 2d - -
Scheduled
2003-04-26 2003-05-17 22 253d 2003-04-26 0d
Unscheduled
2002-08-16 2002-08-16 1 34d - -
Unscheduled
2002-07-13 2002-07-13 1 192d - -
Unscheduled
2002-01-02 2002-01-02 1 2d - -
Scheduled
2001-09-22 2001-12-31 101 458d 2001-09-22 0d
Unscheduled
2000-06-21 2000-06-21 1 41d - -
Scheduled
2000-04-15 2000-05-11 27 123d 2000-04-15 0d
Unscheduled
1999-12-14 1999-12-14 1 272d - -
Unscheduled
1999-03-13 1999-03-17 5 57d - -
Unscheduled
1999-01-15 1999-01-15 1 - - -
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