Perry 1
Online · 100% powerVistra Corp.·Perry, OH·BWR·1,240 MWe
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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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Current reactor power level from the most recent NRC daily report.
100%
Power
ONLINE
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Days of continuous operation since the last outage ended. Ranked against all operating units.
551
Current Run
days
#5 of 95
Top Quartile
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Longest recorded period of continuous operation between outages.
745
Record Run
days
#6 of 95
Top Quartile
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Breaker-to-Breaker runs — continuous operation exceeding the cycle-adjusted threshold (608 days for this 24-month cycle unit) with no trips to 0% power.
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B2B Runs
90% toward B2B (549/608d)
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Lifetime capacity factor: average power level across all recorded days (100% = always at full power). Ranked against all NRC-tracked units.
87.3%
Capacity Factor
#81 of 95
Bottom Quartile
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Net electricity actually generated over the most recent 12 months reported by the U.S. Energy Information Administration (Form EIA-923). These are authoritative actuals, not an estimate.
10.88 TWh
Net Generation
EIA-923 · 12 mo to 2026-07
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Total NRC-reported scram events (emergency reactor shutdowns). Ranked fleet-wide — fewer scrams = better rank.
10
Scrams
#73 of 94
Bottom Quartile
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Years since commercial operation began. License remaining: 20 years.
38.9
Operating Age
years
20 yrs remaining
Excellence Score, Records & Plant Facts
About This Site
Written by NukeWorker from public records: facts that do not change. Operator, status and capacity come from the live data elsewhere on this page. Sources: Wikipedia: Perry Nuclear Generating Station.
Perry Nuclear Power Plant is at North Perry, in Lake County, Ohio, on the shore of Lake Erie about 40 miles northeast of Cleveland.
Read more
Construction began on October 1, 1974. The plant was built around a General Electric BWR-6 boiling water reactor with a Mark III containment. The reactor first went critical in June 1986, connected to the grid on December 19, 1986, and entered commercial operation on November 18, 1987. A second unit was suspended in 1985 and formally cancelled in 1994, when its major buildings and 500-foot cooling tower were already complete.
Facility Statistics
Key performance and lifecycle metrics calculated from NRC operational data. Includes operating age, construction timeline, capacity factor, efficiency, generation totals, and reliability records.
Perry 1 has operated for about 38.9 years and averaged a 87.3% lifetime capacity factor, generating roughly 266.4 TWh of electricity. Its longest unbroken run reached 745 days.
Lifecycle & Tenure
Operating Age: 38.9 Yrs
Build Time: 10.5 Yrs
Lic. Remaining: 20 Yrs
Production & Power
Lifetime CF: 87.3%
Efficiency: 33%
Generated: 266.4 TWh
Reliability & Outages
Record Run: 745 Days
Refuelings: 14
Avg Startup: 8.2 Days
Ownership & Construction
The utility or company that owns and operates the facility, the architect-engineer responsible for plant design, and the primary construction contractor. Click names to view all facilities by that entity on the map.
Ownership, operation and management history
| Date | Change | From | To |
|---|---|---|---|
| Feb 27, 2020 | Spin-off | FirstEnergy | Energy Harbor |
| Mar 1, 2024 | Sold | Energy Harbor | Vistra |
VST
Vistra Corp.
NYSE
$140.16
▼ -0.67 (-0.48%)
Previous Close
140.83
Day's Range
136.18 – 141.50
52-Week Range
132.66 – 203.66
Volume
6,723,877
Delayed quote as of Oct 23, 2026 4:00 PM ET.
Source: Yahoo Finance.
Full quote on Yahoo Finance
Operational Excellence Score Subscribers
Perry 1 is rated 0 to 100 on how well it actually runs, scored against every other operating reactor in the US fleet from its own operating record. Subscribers see the score, the three sub-scores behind it, and each of the seven measured inputs.
- This unit's composite score and fleet rank
- Reliability, Efficiency and Discipline sub-scores
- All seven measured inputs, with fleet percentiles
- Rank against comparable units, not just the fleet
- Three-year, five-year and lifetime windows
- Five-year trend, and every other operating US reactor
Included with every outage subscription and with NukeWorker Gold membership. Trading the outage rather than working it? The same record, cut by power market, is on NukeGryd.
Scram History 10 events since 2011
Automatic and manual reactor scram (emergency shutdown) events reported to the NRC since 2011. Includes event dates, trip type, and average recovery time. Click the title to view the full fleet scram dashboard.
Perry 1 has recorded 10 reactor scrams, or emergency shutdowns, since 2011 (8 automatic, 2 manual). On average the unit was back to full power about 13.8 days after each trip.
Technical Specs
Reactor design specifications including type (PWR/BWR), containment design, nuclear steam supply system manufacturer, thermal and electrical power ratings, and current operational status.
Reactor Type:
BWR
Containment:
BWR-MARK 3
NSS Supplier:
GE 6
Turbine Supplier:
GENERAL ELECTRIC CO. IAEA
Thermal Power:
3758 MWt
Net Capacity:
1240 MWe
Gross Capacity:
1,303 MWe IAEA
Design Capacity:
1,205 MWe IAEA
Efficiency:
33%
Status:
Operating
Lifetime Output:
337.3 TWh through 2025 IAEA
Licensing
NRC licensing history including docket number, license type and number, construction permit date, operating license issuance, commercial operation date, license renewal, and expiration date.
Docket #:
05000440
License #:
NPF-58
License Type:
OL-FP
Const. Permit:
1977-05-03
Construction Start:
1974-10-01 IAEA
Operating Lic:
1986-11-13
First Criticality:
1986-06-06 IAEA
Grid Connection:
1986-12-19 IAEA
Commercial Op:
1987-11-18
License Renewed:
2025-07-07
License Exp:
2046-11-07
Market & Region
EIA market and grid-region classifications: NERC reliability region, U.S. Census region, balancing authority responsible for grid operations, and whether the unit operates as a rate-regulated utility or a competitive merchant generator. Hover any value for the full name.
NERC Region:
RFC
— Reliability First Corporation
Census Region:
ENC
— East North Central
Balancing Authority:
PJM
— PJM Interconnection (ISO/RTO)
Market Structure:
Merchant
— Competitive generator selling into wholesale markets