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Three Mile Island 1 - Plant Information & Status

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

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Three Mile Island 1 Lifecycle: Decommissioned Reactor: OFFLINE

Exelon · Three Mile Island
EXC
Jobs ( PA)
Forum
Books
Three mile Island Nuclear Power Plant (TMI)
Three mile Island Nuclear Power Plant (TMI)

Contact Information

Address: Route 441 South
Middletown, PA 17057
Phone: (717) 948-8000
Website: http://www.exeloncorp.com

Technical Specifications

Reactor Type: PWR ( PWR-DRYAMB)
Net Output: 786 MWe
Thermal Power: 2568 MWt
Efficiency: 30.61%

Licensing & Regulatory Details

Docket #: 050-00289
License #: DPR-50 ( OL-FP)
Construction Permit: 1968-05-18
Operating License: 1974-04-19
Commercial Ops: 1974-09-02
Expiration Date: 2014-04-19
Shutdown Date: 2019-09-20

Site History & Construction

NSS Supplier: B&W LLP
Constructor: UE&C
Architect Engineer: GIL

Current Reactor Status (NRC Data)

0%
OFFLINE
Report Date:
March 22, 2021
Lifecycle: Commissioned | Reactor: OFFLINE
Recent Power History
Date Power Level Visual
Mar 22 0%
Mar 21 0%
Mar 20 0%
Mar 19 0%
Mar 18 0%
Mar 17 0%
Mar 16 0%
Mar 15 0%
Mar 14 0%
Mar 13 0%
Mar 12 0%
Mar 11 0%
Mar 10 0%
Mar 9 0%

Facility Statistics

Lifecycle & Tenure
Op. Age: 45 Yrs
Build Time: 6.3 Yrs
Active Yrs: 45 Yrs
Production & Power
Lifetime CF: 87%
Efficiency: 30.6%
Generated: 133.0 TWh
Reliability & Outages
Record Run: 721 Days
Refuelings (Since '99): 11
Prediction Acc: 67%