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San Onofre 3 - Status & History

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

Decommissioned

Permanently shut down on 2012-01-31. Outage statistics below reflect only the operating period. The final shutdown is not counted as an outage.
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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

Scram # 47628
2012-02-01 Decommissioned 1 (D&D) 143d - -
Scram # 47252
2011-09-09 2011-09-11 3 205d - -
Scram # 47252
2011-09-09 2011-09-11 3 2d - -
Scheduled
2010-10-10 2011-02-16 130 662d 2010-09-26 +14d
Scheduled
2008-10-13 2008-12-17 66 32d 2008-10-15 -2d
Unscheduled
2008-09-02 2008-09-11 10 113d - -
Unscheduled
2008-04-17 2008-05-12 26 160d - -
Unscheduled
2007-10-10 2007-11-09 31 301d - -
Unscheduled
2006-12-13 2006-12-13 1 3d - -
Scheduled
2006-10-17 2006-12-10 55 162d 2006-10-16 +1d
Unscheduled
2006-03-30 2006-05-08 40 324d - -
Unscheduled
2005-05-05 2005-05-10 6 131d - -
Scheduled
2004-09-28 2004-12-25 89 114d 2004-09-27 +1d
Unscheduled
2004-06-05 2004-06-06 2 126d - -
Unscheduled
2004-01-25 2004-01-31 7 343d - -
Unscheduled
2003-01-07 2003-02-16 41 310d - -
Unscheduled
2002-02-28 2002-03-03 4 274d - -
Unscheduled
2001-02-04 2001-05-30 116 4d - -
Unscheduled
2001-01-03 2001-01-31 29 598d - -
Unscheduled
1999-05-14 1999-05-16 3 8d - -
Unscheduled
1999-03-28 1999-05-06 40 - - -
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