Point Beach 1 - Status & History

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

Plant Info Outage History Daily Power Log
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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.
72
Excellence
#12 of 94 ↑2
Top Quartile
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Days of continuous operation since the last outage ended. Clean run (no forced outages since last refueling).
400
Current Run
days ✔
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Longest recorded period of continuous operation between outages (2016-04-04 to 2017-10-07).
551
Record Run
days
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Breaker-to-Breaker runs — continuous operation exceeding the cycle-adjusted threshold (454 days for this 18-month cycle unit) with no trips to 0% power.
7
B2B Runs
86% toward B2B (392/454d)
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Lifetime capacity factor: average power level across all recorded days (100% = always at full power).
91.2%
Capacity Factor
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Total number of scheduled refueling outages detected in the historical data.
18
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.
3.7
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.
98.2%
Fuel Utilization
3yr avg
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NukeWorker's Operational Excellence Score is a composite 0–100 ranking of every active US nuclear unit across 7 publicly observable performance metrics, grouped into three sub-scores:
• Reliability — capacity factor, forced outage days, B2B avg streak
• Efficiency — fuel utilization, refuel duration
• Discipline — startup duration, scram count
Each unit's metric is converted to a percentile across the active fleet. Sub-score = average of its components; composite = average of the three sub-scores. Use the time-window toggle below to switch between 3yr / 5yr / lifetime.
Time window — change how far back we look
NukeWorker's
Operational
Excellence Score
72/100
Top Quartile · #12/94
5-year window

Point Beach 1 ranks #12 of 94 active US units on NukeWorker's Operational Excellence Score over the 5-year window. Strongest area: Fuel Utilization (96th percentile). Weakest: B2B Avg Streak (33th percentile).

Reliability
73
Capacity factor + Forced outages + B2B streaks
Efficiency
88
Fuel utilization + Refuel duration
Discipline
56
Startup duration + Scram count
Cohort Rankings apples-to-apples comparison within each peer group
Reactor type: #7 of 61 PWR
Containment: #7 of 48 Dry Ambient (PWR)
Cycle length: #4 of 54 18-month cycle
Fleet rank above (12 of 94) compares all active US units; cohort ranks compare only against units sharing this property.
Per-dimension breakdown (7 metrics)
Capacity Factor 94th
96.1% (higher better, Reliability)
Forced Outage Days/yr 91th
0.8d (lower better, Reliability)
B2B Avg Streak 33th
506d (higher better, Reliability)
Fuel Utilization 96th
99.2% (higher better, Efficiency)
Refuel Duration 79th
24d (lower better, Efficiency)
Startup Duration 43th
4.8d (lower better, Discipline)
Scrams (5-year) 70th
0.2/yr (lower better, Discipline)

Each dimension's percentile is computed across the active US fleet (94 units with sufficient history). Sub-score = average of its component percentiles. Composite = average of the three sub-scores. 5-year window. View full leaderboard →

Methodology

NukeWorker's Operational Excellence Score is a composite ranking that combines 7 publicly observable performance metrics into a single 0-100 number per US nuclear unit.

How it's computed: Each unit's raw value is converted to a percentile (0-100) within the 94 active US units that have at least 2 completed refueling cycles. The 7 percentiles are averaged into 3 sub-scores (Reliability, Efficiency, Discipline), and those are averaged into the final composite.

Active window — 5-year:

  • Reliability — Capacity factor (5yr), forced outage days/yr (5yr), B2B avg streak (lifetime)
  • Efficiency — in-cycle fuel utilization (3yr), median refuel duration (5yr)
  • Discipline — robust mean startup duration, scrams/yr (5yr, annualised)

Cohort rankings: alongside the fleet rank, each unit gets ranked within its reactor type (PWR/BWR), containment design (Ice Condenser, Mark I, etc.), and cycle length (12/18/24-month). Useful for apples-to-apples comparisons.

What's excluded: subjective community ratings, confidential INPO ratings, financial metrics. We only use publicly available NRC + cycle data.

Why three windows? 5yr (default) is the industry standard. 3yr captures recent operational changes and post-pandemic recovery. Lifetime gives newer units a fair comparison and reveals long-term consistency.

Edge cases: units with fewer than 2 cycles (e.g., Vogtle 4) show "Provisional". Decommissioned units excluded.

Refresh cadence: recomputed daily. Each window cached separately.

A data-derived proxy for operational performance; not affiliated with INPO. INPO ratings are confidential and qualitative — ours is public and quantitative.

5-yr trend: 2021: 61/100 (#32/93)2022: 59/100 (#33/92)2023: 70/100 (#19/92)2024: 71/100 (#17/93)2025: 71/100 (#21/94)2026: 74/100 (#19/94) ↑ +2.4 pts vs 2025
Compare Point Beach 1 head-to-head with up to 3 other units. Compare now
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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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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

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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 11, 2025

22.7% remaining 397 / 513 days 0.4 FPD margin
Avg refuel: 4.5% Avg refuel (3yr): 1.8% Deepest burn: 0.0% (2002-10 → 2004-04) Most margin: 13.2% (2011-12 → 2013-03)
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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

Type ⇅ Actual Start ⇅ Actual End ⇅ Duration ⇅ Days Online ⇅ Scheduled Delta
Scheduled
2025-03-22 2025-04-09 19 508d 2025-03-08 +14d
Scheduled
2023-10-07 2023-10-31 25 534d 2023-10-06 +1d
Scheduled
2022-03-26 2022-04-21 27 237d 2022-03-26 0d
Scram # 55390
2021-08-01 2021-08-01 1 278d - -
Scheduled
2020-10-03 2020-10-27 25 534d 2020-10-02 +1d
Scheduled
2019-03-23 2019-04-18 27 107d 2019-03-22 +1d
Scram # 53779
2018-12-06 2018-12-06 1 401d - -
Scheduled
2017-10-07 2017-10-31 25 551d 2017-10-07 0d
Scheduled
2016-03-12 2016-04-04 24 101d 2016-03-12 0d
Scram # 51570
2015-11-29 2015-12-02 4 361d - -
Scram # 50649
2014-12-03 2014-12-03 1 34d - -
Scheduled
2014-10-04 2014-10-30 27 156d 2014-10-06 -2d
Unscheduled
2014-04-29 2014-05-01 3 378d - -
Scheduled
2013-03-18 2013-04-16 30 214d 2013-03-16 +2d
Scram # 48189
2012-08-15 2012-08-16 2 247d - -
Scheduled SGR/Major
2011-10-03 2011-12-12 71 432d 2011-10-03 0d
Unscheduled
2010-07-27 2010-07-28 2 114d - -
Scheduled
2010-03-01 2010-04-04 35 474d 2010-03-01 0d
Scheduled
2008-10-05 2008-11-12 39 245d 2008-10-05 0d
Unscheduled
2008-01-17 2008-02-03 18 208d - -
Unscheduled
2007-06-16 2007-06-23 8 7d - -
Unscheduled
2007-06-06 2007-06-09 4 32d - -
Scheduled
2007-04-01 2007-05-05 35 472d 2007-03-31 +1d
Unscheduled
2005-12-14 2005-12-15 2 21d - -
Scheduled
2005-09-24 2005-11-23 61 474d 2005-09-23 +1d
Scheduled SGR/Major
2004-04-03 2004-06-07 66 254d 2004-04-02 +1d
Unscheduled
2003-07-16 2003-07-24 9 273d - -
Scheduled
2002-09-14 2002-10-16 33 363d 2002-09-14 0d
Unscheduled
2001-09-07 2001-09-16 10 118d - -
Scheduled
2001-04-07 2001-05-12 36 399d 2001-04-07 0d
Unscheduled
2000-02-21 2000-03-04 13 30d - -
Unscheduled
2000-01-21 2000-01-22 2 44d - -
Scheduled
1999-10-16 1999-12-08 54 149d 1999-10-16 0d
Unscheduled
1999-05-15 1999-05-20 6 18d - -
Unscheduled
1999-04-23 1999-04-27 5 89d - -
Unscheduled
1999-01-23 1999-01-24 2 - - -
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