- Three Mile Island Nuclear Generating Station
Picture=Three Mile Island (color)-2.jpg
caption=The Three Mile Island NPP on Three Mile Island, circa 1979
Status = O
Utility = Exelon Nuclear
Londonderry Township, PA
Babcock & Wilcox
Type = PWR
Capacity = 786
generation = 6,645
for_year = 2007
av_annual_gen = 6,819
built = 1968
September 2, 1974
April 19, 2014
United Engineers and Constructors
Region = 1
website = [http://www.threemileislandinfo.com/ www.threemileislandinfo.com]
Three Mile Island Nuclear Generating Station is a civilian
nuclear power plantlocated on an island (Three Mile Island) in the Susquehanna Rivernear Harrisburg, Pennsylvania, United States. Its name is derived not from the size of the island, but from the fact that TMI is three miles downriver from Middletown, Pennsylvania. It was built with two pressurized water reactors, TMI-1 and TMI-2. The plant is most well known for being the site of the worst civilian nuclear accident in United States history (there were no deaths) when in 1979 TMI-2 suffered a partial meltdown. The core of TMI-2 has since been removed from the site.
The plant was originally built by General Public Utilities Corporation, later renamed GPU Inc., and operated by
Metropolitan Edison Company(Met-Ed), a GPU subsidiary. Following the accident at TMI-2, the plant was transferred under the ownership and operation of a new subsidiary company, GPU Nuclear (GPUN). GPUN continued to operate TMI-1 until its 1998 sale to AmerGen Energy Corporation, a joint venture of Philadelphia Electric Company Energy, Inc. (PECO Energy) and British Energy Group Plc. PECO's share in AmerGen was acquired by Exelon Corporation in 2000, after that company was formed from the merger of PECO and Unicom Corporation. Exelon acquired British Energy's share in AmerGen in 2003, and transferred the plant under the direct ownership and operation of its Exelon Nuclear business unit.
The event was largely publicized, but the accident wasn't as terrible as the media made it out to be. The radiation leak was contained and killed no people. The event was made worse by
The China Syndrome, a movie about a nuclear meltdown that was released 12 days earlier.
The damaged and deactivated TMI-2 remained under GPUN ownership until 2001, when GPUN was acquired and absorbed by First Energy Nuclear Operating Company (FENOC). First Energy continues to own TMI-2, but has subcontracted the maintenance and management of the site to AmerGen Energy from 2001-2003, and Exelon Nuclear from 2003-present.
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