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Vermont Yankee - Status & History

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

Decommissioned

Permanently shut down on 2014-12-29. 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

Unscheduled
2014-12-30 Decommissioned 1 (D&D) 635d - -
Scheduled
2013-03-10 2013-04-04 26 494d 2013-03-09 +1d
Scheduled
2011-10-09 2011-11-02 25 333d 2011-10-16 -7d
Unscheduled
2010-11-08 2010-11-10 3 164d - -
Unscheduled
2010-05-27 2010-05-28 2 5d - -
Scheduled
2010-04-25 2010-05-22 28 532d 2010-04-24 +1d
Scheduled
2008-10-19 2008-11-09 22 415d 2008-10-12 +7d
Unscheduled
2007-08-31 2007-08-31 1 87d - -
Scheduled
2007-05-14 2007-06-05 23 549d 2007-05-13 +1d
Scheduled
2005-10-23 2005-11-11 20 88d 2005-10-22 +1d
Unscheduled
2005-07-26 2005-07-27 2 385d - -
Unscheduled
2004-06-19 2004-07-06 18 47d - -
Scheduled
2004-04-05 2004-05-03 29 186d 2004-04-03 +2d
Unscheduled
2003-09-30 2003-10-02 3 2d - -
Unscheduled
2003-09-28 2003-09-28 1 338d - -
Scheduled
2002-10-07 2002-10-25 19 138d 2002-10-07 0d
Unscheduled
2002-05-12 2002-05-22 11 358d - -
Scheduled
2001-04-28 2001-05-19 22 38d 2001-04-28 0d
Unscheduled
2001-03-20 2001-03-21 2 187d - -
Unscheduled
2000-09-14 2000-09-14 1 288d - -
Scheduled
1999-10-30 1999-12-01 33 - 1999-10-30 0d
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