Nine Mile Point 2

Online · 100% power

Constellation Energy·Scriba, NY·BWR·1,292 MWe

Data refreshed 16.7h ago Rx Status: Oct 19, 2026 at 5:12 AM (M-F)

Outage History Daily Power Log Get alerts

Reactor Status Timeline

Online NRC data, Mon to Fri ? Actual daily reactor status from NRC reports (Mon to Fri) and the current state. What is coming -- the utility's published Scheduled outage and NukeWorker's model Projection -- is part of a subscription. Colored by status. How far ahead you can see depends on your plan.
Nov2025DecJan2026FebMarAprMayJunJulAugSepOctNovOnline: Oct 19, 2025 to Nov 13, 2025Reduced Power: Nov 14, 2025 to Nov 18, 2025Online: Nov 19, 2025 to Feb 4, 2026Coastdown: Feb 5, 2026 to Mar 8, 2026Refueling Outage (N2R20): Mar 9, 2026 to Apr 1, 2026N2R20Power Ascension: Apr 2, 2026 to Apr 5, 2026Online: Apr 6, 2026 to Sep 4, 2026Reduced Power: Sep 5, 2026Online: Sep 6, 2026 to Sep 12, 2026Reduced Power: Sep 13, 2026Online: Sep 14, 2026 to Oct 19, 2026Today
OnlineReduced PowerCoastdownPower AscensionRefueling Outage
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Composite Operational Excellence Score (0-100) — average percentile rank across 7 dimensions in three sub-scores: Reliability (capacity factor, forced outage days, B2B avg streak), Efficiency (fuel utilization, refuel duration), and Discipline (startup duration, scram count). 5-year window. Higher = more operationally excellent. Click to see the full breakdown.
   
Excellence
Rank locked · 93 units
Subscribers
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Days of continuous operation since the last outage ended (Started 2026-04-01). Clean run (no forced outages since last refueling).
201
Current Run
days ✔
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Longest recorded period of continuous operation between outages (2020-04-01 to 2022-03-07).
705
Record Run
days
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Breaker-to-Breaker runs — continuous operation exceeding the cycle-adjusted threshold set for this unit with no trips to 0% power.
1
B2B Runs
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Lifetime capacity factor: average power level across all recorded days (100% = always at full power).
92%
Capacity Factor
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Net electricity actually generated over the most recent 12 months reported by the U.S. EIA (Form EIA-923), summed across every unit at this plant. Authoritative actuals, not an estimate.
15.56 TWh
Net Generation
EIA-923 · 12 mo to 2026-07 · plant total
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Total number of scheduled refueling outages detected in the historical data.
14
Outages
since 1999
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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.
99.0%
Fuel Utilization
3yr avg

Reactor Status

Current Reactor Status Oct 19, 2026

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Current power output from NRC daily reactor status reports, updated Monday through Friday, except federal holidays. The gauge shows power level as a percentage of rated capacity. The sparkline shows the last 14 days of power history. Click to view the full unit dashboard.
Nine Mile Point 2 is Online at 100% of rated power as of Oct 19, 2026. Over the last 14 reported days it has run between 100% and 100% power.
Nine Mile Point 2 is Online Get alerts
100
PERCENT
0 200 400 600 800 1000 1200 1,292 RATED CAPACITY (1,292 MWe) 1,292 MWe
Current:
1,292 MWe
Powering 1,033,600 homes
Rated Capacity:
1,292 MWe
1,033,600 homes
14-Day Power History
Oct 6 Oct 19

Capacity Factor (365-Day)

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100%
Current
91.3%
365-Day Avg
#79
of 94 plants
Min: 0% Max: 100% 32 days <80%

Outage Days by Year

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Total days spent in outage each year, split by scheduled refueling (blue) and forced/unplanned (red). Lower totals indicate better reliability and outage execution. Hover for details.
Across its recorded history, Nine Mile Point 2 has spent 436 days in scheduled refueling outages and 198 days in forced or unplanned outages. Taller bars mark the years with the most downtime.
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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

Nine Mile Point 2 has 52 outages plotted here, averaging 12 days each. The most recent, in Mar 2026, was a scheduled refueling outage lasting 24 days.
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Scheduled refueling outage durations over time. Green bars are at or below this unit's average, amber up to 30% above it, red beyond that. The dashed line is the average. Shorter outages mean better execution.

Refueling Duration Trend

Nine Mile Point 2 has completed 14 scheduled refueling outages on record, averaging 31 days each. The most recent, in Mar 2026, ran 24 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, Nine Mile Point 2 takes about 4 days to climb from first power back to full power. That average is drawn from 14 startups on record, and the most recent took 4 days.
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Daily reactor power over the 120 days before each scheduled refueling outage, one line per refueling, lined up on the day the outage began. A coastdown is the slow decline as the fuel runs out near the end of a cycle. The highlighted line is the most recent refueling and fainter lines are older. Counts and medians cover coastdowns of a week or longer. A shutdown straight from full power, with no decline ahead of it, is what a forced outage looks like.

Coastdown Before Refueling

8 of 14 refuelings 33 days median 88% power at shutdown 0.3% per day
Nine Mile Point 2 coasted down for a week or longer before 8 of its 14 refuelings on record. Those coastdowns ran a median of 33 days and ended near 88% power. The most recent refueling, in Mar 2026, followed a 32-day coastdown from 97% to 87%.
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Estimated fuel remaining in the current cycle, expressed as a percentage of the unit's typical cycle. Starts at 100% when the unit returns to power post-refuel and drops as full-power-days are burned. Days at reduced power burn fuel proportionally — so a unit with significant downtime (high burn deficit) drops slower and ends up with MORE fuel left than its calendar position would suggest. Coastdown threshold around 15%. Toggle to overlay past cycles on a normalized "days into cycle" axis to see how aggressively this unit historically burns down before refuel.

Fuel Burn Down Cycle since Apr 2, 2026

72.0% remaining 2.1 FPD margin
Nine Mile Point 2 has an estimated 72.0% of its fuel left. Across its last 13 cycles, it has refueled with an average of 4.7% remaining.
Avg refuel: 4.7% Avg refuel (3yr): 1.0% Deepest burn: 0.3% (2008-04 → 2010-04) Most margin: 12.9% (2012-06 → 2014-03)
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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, Nine Mile Point 2 has run at about 92% of its rated capacity. Across the last 12 reported months it averaged 91.3%. On the chart, green stretches near the top are full-power running, amber marks reduced power (50 to 89%), and red drops toward zero are outages.
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Estimated reactivity remaining in Nine Mile Point 2's current fuel cycle, shown as a stylized fuel rod that drains as the cycle progresses. The cycle starts when the unit returns to power after its most recent refueling outage, and the gauge represents the fraction of that cycle's typical effective full-power days (EFPD) still available. Days at less than 100% power burn fuel proportionally — so a unit with significant downtime (high burn deficit) drains slower and ends with MORE reactivity left, giving operators margin to coast down (extend the cycle by reducing power) instead of refueling on the calendar. The dashed red line near the bottom marks the rough industry coastdown threshold (~15% remaining). Cycle target is the unit's median recent cycle length. Source: NRC daily reactor status reports cross-referenced against scheduled refuel outage history.

Fuel Burn Down Cycle since Apr 2, 2026

Nine Mile Point 2 is 200 days into its current fuel cycle with an estimated 72.0% of its fuel left. Its typical cycle runs about 706 days.
Fresh — 100%
25% 50% 75% COASTDOWN ~6% DAY 0 DAY 706
Refuel — 0%
72.0% remaining
Fresh fuel
Cycle progress
200 / 706 days
EFPD remaining
508 days
Effective burn
198 EFPD
Burn deficit
2.1 FPD
Nine Mile Point 2 is early in its fuel cycle with 508 EFPD of reactivity remaining. Refuel is not expected for many months.

Outage History & Daily Power Log

This table logs every recorded outage for Nine Mile Point 2, 52 in all since 1999. Of those, 14 were scheduled refueling outages and 38 were unplanned or forced. The typical outage lasted about 12 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
Scheduled N2R20
2026-03-09 2026-04-01 24 528d 2026-03-07 +2d
Scram # 57334 Auto
2024-09-24 2024-09-27 4 182d - -
Scheduled # 57004 Auto N2R19
2024-03-04 2024-03-26 23 180d 2024-03-03 +1d
Scram # 56710 Auto
2023-09-03 2023-09-06 4 355d - -
Unscheduled
2022-09-05 2022-09-13 9 150d - -
Scram # 55821 Auto
2022-04-05 2022-04-08 4 10d - -
Scheduled N2R18
2022-03-07 2022-03-26 20 705d 2022-03-07 0d
Scheduled # 54562 Manual N2R17
2020-03-05 2020-04-01 28 555d 2020-03-09 -4d
Scram # 53565 Auto
2018-08-27 2018-08-28 2 107d - -
Scheduled N2R16
2018-04-16 2018-05-12 27 252d 2018-04-16 0d
Scram # 52889 Auto
2017-08-06 2017-08-07 2 246d - -
Unscheduled
2016-11-25 2016-12-03 9 204d - -
Scheduled N2R15
2016-04-11 2016-05-05 25 414d 2016-04-11 0d
Scram # 50830 Manual
2015-02-19 2015-02-22 4 298d - -
Scheduled N2R14
2014-03-24 2014-04-27 35 13d 2014-03-23 +1d
Scram # 49888 Auto
2014-03-11 2014-03-11 1 5d - -
Scram # 49868 Manual
2014-03-04 2014-03-06 3 87d - -
Scram # 49593 Manual
2013-12-03 2013-12-07 5 380d - -
Unscheduled
2012-11-15 2012-11-18 4 124d - -
Scram # 48097 Manual
2012-07-12 2012-07-14 3 38d - -
Scheduled N2R13
2012-04-09 2012-06-04 57 116d 2012-04-08 +1d
Unscheduled
2011-12-10 2011-12-15 6 121d - -
Unscheduled
2011-08-07 2011-08-11 5 462d - -
Scheduled N2R12
2010-04-03 2010-05-02 30 84d 2010-04-03 0d
Unscheduled
2010-01-07 2010-01-09 3 418d - -
Unscheduled
2008-11-13 2008-11-15 3 211d - -
Scheduled N2R11
2008-03-22 2008-04-16 26 128d 2008-03-18 +4d
Unscheduled
2007-11-04 2007-11-15 12 235d - -
Unscheduled
2007-03-09 2007-03-14 6 331d - -
Scheduled N2R10
2006-03-20 2006-04-12 24 10d 2006-03-19 +1d
Unscheduled
2006-03-10 2006-03-10 1 685d - -
Scheduled N2R9
2004-03-16 2004-04-24 40 212d 2004-03-15 +1d
Unscheduled
2003-08-15 2003-08-17 3 13d - -
Unscheduled
2003-07-25 2003-08-02 9 212d - -
Unscheduled
2002-12-21 2002-12-25 5 3d - -
Unscheduled
2002-12-17 2002-12-18 2 24d - -
Unscheduled
2002-11-12 2002-11-23 12 211d - -
Scheduled N2R8
2002-03-16 2002-04-15 31 89d 2002-03-16 0d
Unscheduled
2001-12-16 2001-12-17 2 11d - -
Unscheduled
2001-12-03 2001-12-05 3 46d - -
Unscheduled
2001-10-16 2001-10-18 3 80d - -
Unscheduled
2001-07-22 2001-07-28 7 65d - -
Unscheduled
2001-05-17 2001-05-18 2 7d - -
Unscheduled
2001-05-05 2001-05-10 6 64d - -
Unscheduled
2001-02-26 2001-03-02 5 114d - -
Unscheduled
2000-10-30 2000-11-04 6 41d - -
Unscheduled
2000-09-18 2000-09-19 2 3d - -
Unscheduled
2000-09-10 2000-09-15 6 145d - -
Scheduled N2R7
2000-03-04 2000-04-18 46 226d 2000-03-04 0d
Unscheduled
1999-07-03 1999-07-22 20 3d - -
Unscheduled
1999-06-25 1999-06-30 6 54d - -
Unscheduled
1999-04-24 1999-05-02 9 - - -
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