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LaSalle 1 - Plant Information & Status

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

Capacity Factor (365-Day)

100%
Current
90.2%
365-Day Avg
#85
of 94 plants
Min: 0% Max: 100% 36 days <80%

Ratings

LaSalle
Above Average
4 (12%)
Average
14 (42%)
Below Average
15 (45%)
Total Members Voted: 10

Facility Statistics

Lifecycle & Tenure
Operating Age: 42.3 Yrs
Build Time: 10.3 Yrs
Lic. Remaining: 16 Yrs
Production & Power
Lifetime CF: 94.1%
Efficiency: 31.9%
Generated: 254.1 TWh
Reliability & Outages
Record Run: 740 Days
Refuelings: 13

Scram History 6 events since 2011

6
Total
5
Automatic
1
Manual
1.8
Avg Recovery (days)
Recent Events
2025-12-27 Manual MANUAL REACTOR SCRAM DUE TO RCS LEAK The following informati...
2025-11-01 Auto AUTOMATIC REACTOR SCRAM The following information was provid...
2017-02-16 Auto AUTOMATIC REACTOR SCRAM RESULTING FROM FEEDWATER REGULATING ...
2017-02-12 Auto UNIT 1 AUTOMATIC REACTOR SCRAM DUE TO MAIN GENERATOR TRIP ON...
2013-04-16 Auto NOTIFICATION OF UNUSUAL EVENT DECLARED DUE TO LOSS OF OFFSIT...
2011-01-31 Auto REACTOR SCRAM AFTER A MAIN TRANSFORMER TRIP "At 1918 CST on ...

Ownership & Construction

Owner/Operator: Constellation Energy
Architect Engineer: S&L
Constructor: CWE

Technical Specs

Reactor Type: BWR
Containment: BWR-MARK 2
NSS Supplier: GE 5
Thermal Power: 3546 MWt
Net Capacity: 1131 MWe
Efficiency: 31.9%
Status: Operating

Licensing

Docket #: 05000373
License #: NPF-11
License Type: OL-FP
Const. Permit: 1973-09-10
Operating Lic: 1982-04-17
Commercial Op: 1984-01-01
License Renewed: 2016-10-19
License Exp: 2042-04-17

Facility Map

41.2455, -88.6688

Location & Contact

Address:
2601 North 21st Road
Marseilles, IL 61341, USA
Get Directions
Phone: (815) 357-6761