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Limerick 1 - Plant Information & Status

Technical specifications, contact data, ratings, and licensing history for the Limerick facility.

Ratings 38 votes

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Community ratings from NukeWorker members. Vote to share your experience working at this facility. Results show the breakdown of Above Average, Average, and Below Average ratings.

Capacity Factor (365-Day)

93%
Current
99.6%
365-Day Avg
#23
of 94 plants
Min: 72% Max: 100% 1 days <80%

Scram History 6 events since 2011

6
Total
4
Automatic
2
Manual
2
Avg Recovery (days)
Recent Events
2020-11-12 Auto AUTOMATIC REACTOR SCRAM DUE TO HIGH REACTOR PRESSURE SIGNAL ...
2015-02-22 Auto AUTOMATIC REACTOR SCRAM ON REACTOR HIGH PRESSURE SIGNAL "At ...
2014-03-03 Manual UNIT 1 MANUALLY SCRAMMED DURING A RAPID SHUTDOWN IN RESPONSE...
2012-07-17 Auto UNUSUAL EVENT DECLARED DUE TO FLASHOVER IN THE LOAD CENTER T...
2012-04-18 Manual MANUAL REACTOR SCRAM FOLLOWING LOSS OF RECIRCULATION PUMPS "...
2011-06-02 Auto AUTOMATIC SCRAM FOLLOWING A TURBINE TRIP "Limerick Unit 1 au...

Performance Charts

Outage Duration Trend

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Scheduled refueling outage durations over time. Green bars are below average, yellow near average, red above. Dashed line shows the plant's historical average. Shorter outages mean better execution.

Power History (12-Month)

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Daily power output as a percentage of rated capacity over the past 365 days. Green segments indicate full power (90%+), yellow shows reduced output, and red indicates significant power reductions or shutdowns.

Outage Timeline

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Visual timeline of all recorded outages. Blue bars are scheduled refueling outages, red bars are forced/unplanned outages. Width represents outage duration. Hover for details.

Facility Statistics

Lifecycle & Tenure
Operating Age: 40.2 Yrs
Build Time: 11.6 Yrs
Lic. Remaining: 18.6 Yrs
Production & Power
Lifetime CF: 94.9%
Efficiency: 31.9%
Generated: 253.9 TWh
Reliability & Outages
Record Run: 733 Days
Refuelings: 13

Ownership & Construction

Owner/Operator: Constellation Energy
Architect Engineer: BECH
Constructor: BECH

Technical Specs

Reactor Type: BWR
Containment: BWR-MARK 2
NSS Supplier: GE 4
Thermal Power: 3515 MWt
Net Capacity: 1120 MWe
Efficiency: 31.9%
Status: Operating

Licensing

Docket #: 05000352
License #: NPF-39
License Type: OL-FP
Const. Permit: 1974-06-19
Operating Lic: 1985-08-08
Commercial Op: 1986-02-01
License Renewed: 2014-10-20
License Exp: 2044-10-26

Facility Map

40.2238, -75.5869

Location & Contact

Address:
3146 Sanatoga Rd
Pottstown, PA 19464, USA
Get Directions
Phone: (610) 718-1200

Breaker-to-Breaker Runs 7 runs

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Breaker-to-breaker runs measure continuous operation between refueling outages (470+ days). An active streak means the unit has been running continuously since the last refueling. Longer runs indicate better reliability.
705
Active Streak (days)
Since 2024-04-28
727
Best Run (days)
2008-03-25 → 2010-03-22
640
Avg Run (days)
All Runs
2024-04-28 Active 705 days
2020-11-18 2022-04-04 502 days
2018-04-18 2020-03-28 710 days
2016-04-17 2018-03-26 708 days
2012-09-07 2014-03-05 544 days
2008-03-25 2010-03-22 727 days
2006-05-21 2008-03-01 650 days