FitzPatrick
Online · 100% powerConstellation Energy·Lycoming, NY·BWR·853 MWe
?
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
?
Current reactor power level from the most recent NRC daily report.
100%
Power
ONLINE
?
Days of continuous operation since the last outage ended. Ranked against all operating units.
15
Current Run
days
#75 of 95
Bottom Quartile
?
Longest recorded period of continuous operation between outages.
831
Record Run
days
#3 of 95
Top Quartile
?
Breaker-to-Breaker runs — continuous operation exceeding the cycle-adjusted threshold (624 days for this 24-month cycle unit) with no trips to 0% power.
5
B2B Runs
#40 of 85
Mid Quartile
?
Lifetime capacity factor: average power level across all recorded days (100% = always at full power). Ranked against all NRC-tracked units.
91.8%
Capacity Factor
#29 of 95
Mid Quartile
?
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.
7.37 TWh
Net Generation
EIA-923 · 12 mo to 2026-07
?
Total NRC-reported scram events (emergency reactor shutdowns). Ranked fleet-wide — fewer scrams = better rank.
7
Scrams
#46 of 94
Mid Quartile
?
Years since commercial operation began. License remaining: 8 years.
51.2
Operating Age
years
8 yrs remaining
Excellence Score, Records & Plant Facts
B2B CHAMPION
753 days without a trip
·
5 Career Runs · 1 since last trip
Champion since Jun 11, 2026
Breaker-to-Breaker Runs 5 runs
Breaker-to-breaker runs measure continuous operation between refueling outages using a cycle-adjusted threshold (90% of cycle length minus RFO duration). An active streak means the unit has been running continuously since the last refueling with no trips to 0% power.
FitzPatrick has logged 5 breaker-to-breaker runs, continuous stretches from one refueling to the next with no trip to zero power. Its longest ran 721 days, and its runs average 706 days.
721
Best Run (days)
RO24 (2020-10-05) → RO25 (2022-09-26)
706
Avg Run (days)
★ Triple breaker-to-breaker
RO24 → RO25 → RO26 → RO27
All Runs
| 2024-09-25 | 2026-09-14 | 719 days | RO26 → RO27 |
| 2022-10-17 | 2024-09-04 | 688 days | RO25 → RO26 |
| 2020-10-05 | 2022-09-26 | 721 days | RO24 → RO25 |
| 2010-10-17 | 2012-09-17 | 701 days | RO19 → RO20 |
| 2008-10-10 | 2010-09-13 | 703 days | RO18 → RO19 |
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: James A. FitzPatrick Nuclear Power Plant.
James A. FitzPatrick Nuclear Power Plant is a single-unit nuclear plant in the Town of Scriba, Oswego County, New York, on the southeast shore of Lake Ontario about eight miles northeast of Oswego.
Read more
Construction began on September 1, 1968. The plant has a General Electric BWR-4 boiling water reactor with Mark 1 containment. It was first connected to the grid on February 1, 1975, and entered commercial operation on July 28, 1975. The New York Power Authority operated the plant until it sold it to Entergy in November 2000.
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.
FitzPatrick has operated for about 51.2 years and averaged a 91.8% lifetime capacity factor, generating roughly 190.2 TWh of electricity. Its longest unbroken run reached 831 days.
Lifecycle & Tenure
Operating Age: 51.2 Yrs
Build Time: 5.2 Yrs
Lic. Remaining: 8 Yrs
Production & Power
Lifetime CF: 91.8%
Efficiency: 33.6%
Generated: 190.2 TWh
Reliability & Outages
Record Run: 831 Days
Refuelings: 14
Avg Startup: 5.3 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 |
|---|---|---|---|
| Nov 2000 | Sold | New York Power Authority | Entergy |
| Mar 31, 2017 | Sold | Entergy | Exelon |
| Feb 1, 2022 | Spin-off | Exelon | Constellation Energy |
CEG
Constellation Energy Corporation
NasdaqGS
$271.37
▼ -3.63 (-1.32%)
Previous Close
275.00
Day's Range
269.32 – 276.18
52-Week Range
228.63 – 406.04
Volume
3,897,812
Delayed quote as of Oct 16, 2026 4:00 PM ET.
Source: Yahoo Finance.
Full quote on Yahoo Finance
Operational Excellence Score Subscribers
FitzPatrick 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 7 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.
FitzPatrick has recorded 7 reactor scrams, or emergency shutdowns, since 2011 (5 automatic, 2 manual). On average the unit was back to full power about 15.3 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 1
NSS Supplier:
GE 4
Turbine Supplier:
GENERAL ELECTRIC CO. IAEA
Thermal Power:
2536 MWt
Net Capacity:
853 MWe
Design Capacity:
821 MWe IAEA
Efficiency:
33.6%
Status:
Operating
Lifetime Output:
287.0 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 #:
05000333
License #:
DPR-59
License Type:
OL-FP
Const. Permit:
1970-05-20
Construction Start:
1968-09-01 IAEA
Operating Lic:
1974-10-17
First Criticality:
1974-11-17 IAEA
Grid Connection:
1975-02-01 IAEA
Commercial Op:
1975-07-28
License Renewed:
2008-09-08
License Exp:
2034-10-17
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:
NPCC
— Northeast Power Coordinating Council
Census Region:
MAT
— Middle Atlantic
Balancing Authority:
NYIS
— New York Independent System Operator (NYISO) (ISO/RTO)
Market Structure:
Merchant
— Competitive generator selling into wholesale markets