Millstone 2 & 3

Basic Facts:

  • Location: Waterford, Connecticut
  • Owner: Dominion Energy
  • Operator: Dominion Energy
  • Construction Cost: $10.8B (2018$)
  • Plant Output: 2,100 MW (combined)
  • Property Size: 540 acres
  • Status: Operational
  • Employees: 1,300
  • Expected Shut Down Date: Unit 2 (2035), Unit 3 (2045)
  • Current DTF Balance: $1.3B (2018$)
  • DTF Balance Prior to Decommissioning: $2.1B (2018$)
  • Decommissioning Cost Estimate: $1.0B (2018$)
  • Spent Nuclear Fuel on Site: 1,279 metric tons
Millstone 1 Photo


Millstone 2 and 3 consists of two pressurized water reactors. Construction of Unit 2 began in 1969 with Unit 3 construction beginning in 1974. Licensed operations for Unit 2 and 3 began in 1975 and 1986 respectively.

In 2005, the Nuclear Regulatory Commission granted twenty-year license renewals for both reactors, extending the licensed operational life of Unit 2 to 2035 and Unit 3 to 2045.


The Millstone nuclear power plant is located within New London, Connecticut. As of 2016, socioeconomic information is as follows:

  • Population: 270,000
  • Per Capita Annual Income: $54,000
  • Unemployment rate (not seasonally adjusted): 4.7%

The Millstone nuclear facility generates approximately $900M in annual economic output from station operations for the state of Connecticut. Millstone’s tax contribution to local and state governments is approximately $40 million.

Contact Information

Economic Development Administration Representative:

Economic Development District

University Center

Nuclear Regulatory Commission

Unless specific costing information has been provided, decommissioning costs were derived from 2017 Decommissioning Funding Status Report.
Information herein obtained from public sources. Corrections are welcome and may be directed to [email protected].

Additional Information

Panel Discussion Suggests Connecticut’s Nuclear Waste Is Not Going Anywhere Soon

April 2, 2024

Panel Discussion Suggests Connecticut’s Nuclear Waste Is Not Going Anywhere Soon | CT News JunkieUS Congressman Joe Courtney, D-2nd District, provided an update recently about nuclear waste, including what’s being generated at the Millstone Power Station and also at the rest of the nation’s nuclear power plants.

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Energy secretary: We must find a solution for nuclear waste

May 22, 2022

Energy secretary: We must find a solution for nuclear waste WATERFORD, Conn. (AP) – It is critical to find a solution for storing the nation’s spent nuclear fuel, U.S. Energy Secretary Jennifer Granholm said Friday during a visit to a nuclear power plant in Connecticut. Granholm was invited to tour Millstone Nuclear Power Station in […]

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Dominion to keep Connecticut Millstone nuclear plant in service

March 18, 2019
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Dominion scrambling for Connecticut utility deals to save Millstone reactors

March 8, 2019
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The Millstone nuclear plant faces a tight deadline to survive

March 5, 2019
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Connecticut moves to preserve Millstone nuclear plant with 10-year power deal

January 4, 2019
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Nuclear wins big in clean energy competition – and not just Millstone

January 2, 2019
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State regulators clear Millstone nuclear plants to compete in zero-emission energy auctions – December 5, 2018

December 19, 2018
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Millstone wins “at risk” status – November 20, 2018

December 19, 2018
Read More

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