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LaSalle 1 - Plant Information & Status

Detailed technical specifications, licensing info, and upcoming refueling outage schedules for the LaSalle 1 nuclear power facility.

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LaSalle 1 Lifecycle: Commissioned Reactor: ONLINE

Constellation Energy Corporation · LaSalle
Lasalle lake sign
Lasalle lake sign

Contact Information

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

Technical Specifications

Reactor Type: BWR ( BWR-MARK 2)
Net Output: 1131 MWe
Thermal Power: 3546 MWt
Efficiency: 31.9%

Licensing & Regulatory Details

Docket #: 05000373
License #: NPF-11 ( OL-FP)
Construction Permit: 1973-09-10
Operating License: 1982-04-17
License Renewed: 2016-10-19
Commercial Ops: 1984-01-01
Expiration Date: 2042-04-17

Site History & Construction

NSS Supplier: GE 5
Constructor: CWE
Architect Engineer: S&L

Current Reactor Status (NRC Data)

100%
ONLINE
Report Date:
March 20, 2026
Lifecycle: Commissioned | Reactor: ONLINE
Recent Power History
Date Power Level Visual
Mar 20 100%
Mar 19 100%
Mar 18 100%
Mar 17 100%
Mar 16 85%
Mar 13 100%
Mar 12 100%
Mar 11 100%
Mar 10 100%
Mar 9 100%
Mar 6 100%
Mar 5 100%
Mar 4 98%
Mar 3 100%

Facility Statistics

Lifecycle & Tenure
Op. Age: 42.2 Yrs
Build Time: 10.3 Yrs
Lic. Remain: 16.1 Yrs
Production & Power
Lifetime CF: 94.1%
Efficiency: 31.9%
Generated: 253.6 TWh
Reliability & Outages
Record Run: 740 Days
Refuelings (Since '99): 13
Prediction Acc: 67%