Three Mile Island 2

Basic Facts:

  • Location: Londonderry Township, Pennsylvania
  • Owner: Energy Solutions
  • Operator: Constellation Energy Company
  • Construction Cost: $3.0B (2018$)
  • Plant Output: 910 MW
  • Property Size: 810 acres
  • Status: DECON
  • Current DTF Balance: $800M (2018$)
  • Decommissioning Cost Estimate: $1.3B (2018$)
  • Spent Nuclear Fuel on Site: None
Three Mile Island 1 Photojpg

Background

Three Mile Island Unit 2 was a 910 MW pressurized water reactor located on the shores of the Susquehanna River. Unit 1 construction began in 1969 and the facility began commercial operations in 1978. In 1979, a malfunction of the cooling system caused a partial meltdown of the reactor core and Unit 2 is no longer operational. Unit 2’s nuclear fuel has been transported to Idaho National Labs and the plant has been decontaminated as necessary and stabilized. Further decommissioning of Unit 2 is anticipated to take place in concert with decommissioning of Unit 1.

Socioeconomics

Three Mile Island is located within Dauphin County, Pennsylvania. As of 2016:

  • Population: 280,000
  • Per Capita Annual Income: $49,000
  • Unemployment rate (not seasonally adjusted): 4.5%

Contact Information

Economic Development Administration Representative:

  • Christopher Casper, Philadelphia Regional Office, t: (215) 597-1074, e: ccasper1@eda.gov

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 info@decommissioningcollaborative.org.

Additional Information

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Three Mile Island considers nuclear restart as Pa. lawmakers look to new tech to meet demand

July 15, 2024

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Three Mile Island considers nuclear restart as Pa. lawmakers look to new tech to meet demand

July 12, 2024

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Could nuclear power restart at Three Mile Island? Here’s what to know about the plant’s history Jul. 9-It’s been half a decade since Three Mile Island provided power to Pennsylvania, but one of the nuclear plant’s decommissioned reactors might have a restart in its future.

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Closed nuclear power plangts may reopen to help reach emissions goal

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Do the owners have enough money to decommission Three Mile Island?

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Cur­tis Schube: Do the owners have enough money to decommission Three Mile Island? Three Mile Island is at it again, but this time it is the NRC that’s asleep at the wheel. Any power producer, whether oil rigs, windmills, or, in…

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Three Mile Island starts decommissioning Unit 2

May 9, 2023

Three Mile Island starts decommissioning Unit 2 DAUPHIN COUNTY, Pa. (WHTM) – A big step forward at Three Mile Island has been 30 years in the making. The project to decommission Unit 2, which suffered a partial meltdown in 1979, is now moving into a new phase, allowing crews to begin removing core debris.

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43 years after TMI accident, decommissioning process underway

March 30, 2022

43 years after TMI accident, decommissioning process underway LONDONDERRY TOWNSHIP, Pa. (WHTM) – Forty-three years ago, Three Mile Island in Dauphin County became the site of a nuclear accident that captured worldwide attention and is considered the worst commercial nuclear accident in U.S. history. The 1979 partial meltdown in the Unit 2 reactor was the […]

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