Connecticut Yankee
DECONYankee Atomic Power·Haddam Neck, CT·PWR·560 MWe
Reactor Data
Reactor Units
Every power reactor at this site as listed in the IAEA Power Reactor Information System (PRIS): reactor type and model, net electrical capacity, grid connection and commercial operation dates, and current status.
1 unit: 1 permanent shutdown.
| Unit | Type | Model | Net MWe | Construction | Grid | Commercial Op | Shutdown | Status |
|---|---|---|---|---|---|---|---|---|
| Connecticut Yankee | PWR | - | 560 | 1964-05-01 | 1967-08-07 | 1968-01-01 | 1996-12-05 | Permanent Shutdown |
Capacity, milestones and suppliers
| Unit | Design MWe | Gross MWe | Thermal MWt | First Criticality | Reactor Supplier | Turbine Supplier | Notes |
|---|---|---|---|---|---|---|---|
| Connecticut Yankee | 582 | 603 | 1,825 | 1967-07-24 | WESTINGHOUSE ELECTRIC CORPORATION | WESTINGHOUSE ELECTRIC CORPORATION |
Lifetime performance, through 2025
| Unit | Electricity Supplied | Load Factor | Energy Availability | Operating Factor |
|---|---|---|---|---|
| Connecticut Yankee | 105.7 TWh | 73.3% | 79.8% | 75.7% |
Operator: CONNECTICUT YANKEE ATOMIC POWER CO.
Owner: CONNECTICUT YANKEE ATOMIC POWER CO.
Source: IAEA Power Reactor Information System (PRIS), as of 2026-10-19.
Fuel Cycle Facilities
Fuel cycle plants at this site, as listed in the IAEA Nuclear Fuel Cycle Facilities Database: what each plant does, its scale and design capacity, the years it operated, its current status and who operates it.
1 facility: 1 in operation.
| Facility | Type | Scale | Design Capacity | Operated | Status | Operator |
|---|---|---|---|---|---|---|
| Haddam Neck NPP Site | AFR Dry Spent Fuel Storage | Commercial | 190 t HM | 1996– | In Operation | Connecticut Yankee Atomic Power Co |
Source: IAEA Nuclear Fuel Cycle Facilities Database (NFCFDB), as of 2026-10-13.
Working Here
Jobs in CT 10 active
Active nuclear industry job listings in CT from the NukeWorker job board. Click a job title for full details, or click the header to search all jobs in this state.
Per Diem Rates FY 2027
Per diem covers lodging and meals & incidental expenses (M&IE) for government and contractor travel near this facility. Rates are from GSA for FY 2027.
$113
Lodging/Night
$68
M&IE/Day
$181
Total/Day
Standard Rate, CT
Unemployment Benefits CT
Maximum state unemployment insurance benefits for CT. Actual benefits depend on your earnings history and may be lower than the maximum. Data as of Jan 2026.
$826
Max Weekly
26
Max Weeks
$21,476
Max Total
Photos
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Facility Map
Interactive satellite map showing the facility's geographic location. Marker color indicates current status: green for online, red for offline, orange for reduced power. Click the header to open in Google Maps satellite view.
41.4819, -72.4993
Location & Contact
Physical address, phone number, and website for this facility. Use the directions link to get driving directions via Google Maps.
Phone:
860-267-6426
Website:
http://www.connyankee.com/
NukeWorker Member Ratings 22 votes
Community ratings from NukeWorker members. Vote to share your experience working at this facility. Score uses a Bayesian average that accounts for vote count — facilities with few votes are pulled toward the fleet average, so rankings reflect confidence, not just raw percentages.
Above Average
4 (18%)
Average
8 (36%)
Below Average
10 (45%)
Plant Facts
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: Connecticut Yankee Nuclear Power Plant.
Connecticut Yankee was a nuclear power plant at Haddam Neck, Middlesex County, Connecticut, on the Connecticut River near the East Haddam Swing Bridge.
Read more
Construction began on May 1, 1964. The plant had a Westinghouse pressurized water reactor and served as a prototype for Westinghouse's four-loop design. It was first connected to the grid on August 7, 1967, and entered commercial operation on January 1, 1968. Electricity production ended in 1996, with permanent shutdown on December 5, 1996, because continued operation was judged not cost effective. Decommissioning was largely complete by 2004, and demolition of the containment dome finished in July 2006.
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.
Publicly Traded
No — Dissolved decommissioning trust company
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:
PWR
Containment:
PWR-DRYAMB
NSS Supplier:
WEST 4LP
Thermal Power:
1825 MWt
Net Capacity:
560 MWe
Status:
DECON
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 #:
05000213
License #:
DPR-61
License Type:
OL-FP
Const. Permit:
1964-05-26
Operating Lic:
1974-12-27
Commercial Op:
1968-01-01
License Exp:
2007-06-29