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Susquehanna 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

Unscheduled
2026-03-23 In Outage 12+ 127d - -
Unscheduled
2025-11-13 2025-11-16 4 112d - -
Scram # 57822
2025-07-23 2025-07-24 2 314d - -
Unscheduled
2024-09-09 2024-09-12 4 138d - -
Scheduled
2024-03-25 2024-04-24 31 132d 2024-03-24 +1d
Scram # 56846
2023-11-10 2023-11-14 5 534d - -
Scram # 55909
2022-05-24 2022-05-25 2 24d - -
Scheduled
2022-03-28 2022-04-30 34 112d 2022-03-28 0d
Scram # 55616
2021-12-01 2021-12-06 6 128d - -
Scram # 55370
2021-07-22 2021-07-26 5 441d - -
Scram # 54691
2020-05-04 2020-05-07 4 3d - -
Unscheduled
2020-04-29 2020-05-01 3 6d - -
Scheduled
2020-03-28 2020-04-23 27 583d 2020-03-27 +1d
Unscheduled
2018-08-19 2018-08-23 5 110d - -
Scheduled
2018-03-31 2018-05-01 32 295d 2018-04-30 -30d
Scram # 52795
2017-06-09 2017-06-09 1 347d - -
Unscheduled
2016-06-07 2016-06-27 21 36d - -
Unscheduled
2016-04-23 2016-05-02 10 3d - -
Scheduled
2016-03-13 2016-04-20 39 116d 2016-03-13 0d
Scram # 51532
2015-11-13 2015-11-18 6 331d - -
Unscheduled
2014-12-14 2014-12-17 4 193d - -
Scheduled
2014-04-13 2014-06-04 53 306d 2014-04-12 +1d
Unscheduled
2013-06-11 2013-06-11 1 3d - -
Scram # 49099
2013-06-08 2013-06-08 1 2d - -
Scram # 49099
2013-06-05 2013-06-06 2 4d - -
Unscheduled
2013-05-09 2013-06-01 24 184d - -
Unscheduled
2012-10-21 2012-11-06 17 113d - -
Unscheduled
2012-06-20 2012-06-30 11 16d - -
Scheduled
2012-04-01 2012-06-04 65 284d 2012-03-30 +2d
Unscheduled
2011-05-17 2011-06-22 37 69d - -
Unscheduled
2011-03-05 2011-03-09 5 37d - -
Scram # 46569
2011-01-26 2011-01-27 2 176d - -
Unscheduled
2010-07-17 2010-08-03 18 61d - -
Unscheduled
2010-05-15 2010-05-17 3 21d - -
Unscheduled
2010-04-23 2010-04-24 2 7d - -
Scheduled
2010-03-02 2010-04-16 46 685d 2010-03-02 0d
Scheduled
2008-03-04 2008-04-16 44 128d 2008-03-05 -1d
Scheduled
2007-10-13 2007-10-28 16 319d 2007-10-13 0d
Unscheduled
2006-11-26 2006-11-28 3 161d - -
Unscheduled
2006-06-15 2006-06-18 4 66d - -
Scheduled
2006-03-04 2006-04-10 38 110d 2006-03-03 +1d
Unscheduled
2005-10-29 2005-11-14 17 555d - -
Unscheduled
2004-04-22 2004-04-22 1 2d - -
Scheduled
2004-02-28 2004-04-20 53 153d 2004-02-27 +1d
Unscheduled
2003-09-24 2003-09-28 5 519d - -
Scheduled
2002-03-02 2002-04-23 53 667d 2002-03-02 0d
Scheduled
2000-03-19 2000-05-04 47 249d 2000-03-19 0d
Unscheduled
1999-07-01 1999-07-14 14 27d - -
Unscheduled
1999-05-30 1999-06-04 6 - - -
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