Three Mile Island Nuclear Generating Station Fact Sheet
Facility: Three Mile Island Nuclear Generating Station operated by Exelon Nuclear Corporation.
Location: Londonderry Township, Dauphin County
Site Area: 814 acres
Energy Production Unit 1 - 872 Megawatts PWR/B&W Capacity: Unit 2 - Out of Service
Operating Status: Unit 1 began a phased restart process on October 3, 1985 and reached 100% power on January 6, 1986. Aside from periodic maintenance and refueling, the unit has been operating at full power since then. Unit 2 is shutdown indefinitely, with a cleanup program currently near completion. Defueling was completed in 1990. After the cleanup, the unit will be maintained in a non-operating storage status.
Affected Jurisdictions
Mass Care Risk County Risk Municipality Risk Population* Requirement
Cumberland County
Lower Allen Township 2,354 471
New Cumberland Boro. 7,235 1,447
COUNTY TOTAL 9,589 1,918
Mass Care Risk County Risk Municipality Risk Population* Requirement
Dauphin County
Conewago Township 3,004 601
Derry Township 24,651 4,931
Harrisburg City 5,521 1,104
Highspire Borough 2,399 480
Hummelstown Borough 4,532 906
TMI Fact Sheet Page 1 Londonderry Township 5,245 1,049
Lower Paxton Township 5,957 1,191
Lower Swatara Township 8,307 1,661
Middletown Borough 8,890 1,778
Paxtang Borough 1,561 312
Royalton Borough 907 181
South Hanover Township 6,254 1,251
Steelton Borough 5,990 1,198
Swatara Township 23,362 4,673
COUNTY TOTAL 106,580 21,316
Risk County Risk Municipality Risk Population* Mass Care Requirement
Lancaster County
Conoy Township 3,194 639
East Donegal Township 5,293 1,059
Elizabethtown Borough 11,545 2,309
Mount Joy Township 8,132 1,626
West Donegal Township 8,260 1,652
COUNTY TOTAL 36,424 7,285
Risk County Risk Municipality Risk Population* Mass Care Requirement
Lebanon County
South Londonderry Twp. 825 165
COUNTY TOTAL 825 165
TMI Fact Sheet Page 2 Risk County Risk Municipality Risk Population* Mass Care Requirement
York County
Conewago Township 7,472 1,494
Dover Township 1,530 306
East Manchester Twp. 7,287 1,457
Fairview Township 16,223 3,246
Goldsboro Borough 942 188
Hellam Township 977 195
Lewisberry Borough 362 72
Manchester Borough 2,771 554
Manchester Township 15,759 3,151
Mount Wolf Borough 1,393 279
Newberry Township 15,332 3,067
Springettsbury Township 345 69
Warrington Township 989 198
York Haven Borough 709 142
COUNTY TOTAL 72,091 14,418
GRAND TOTAL 225,509 45,102
*Population within the plume exposure pathway EPZ.
Support Counties
Support Counties Reception Centers Mass Care Requirement
Adams County Gettysburg High School 6,763
Cumberland County Big Spring High School 1,918
Shippensburg University 6,176
Dauphin County William Valley High School 3,807
Franklin County Faust Junior High School 2,782
Lancaster County Park City Mall 7,285
TMI Fact Sheet Page 3 Lebanon County Lebanon County Career and Technology 5,095 Center
Schuylkill County Blue Mountain High School 3,621
York County Northern High School 1,856
Red Lion High School 2,003
Susquehannock High School 3,796
TOTAL 45,102
A total of 96 sirens provide coverage of the plume exposure Alert System Status pathway EPZ. The respective counties operate the sirens within each county. The Utility maintains the siren system.
Major Population Centers
Municipality 2010 Population Distance Miles From Londonderry Township
Harrisburg, PA 49,625 12
York, PA 43,745 14
Lebanon, PA 25,474 22
Lancaster, PA 59,972 25
Reading, PA 88,089 47
School Districts
School Districts with Schools Located in the School Districts Outside the EPZ with EPZ Students Residing in the EPZ Cumberland County – 1 Cumberland County – 1 West Shore Cumberland Perry Vo-Tech School (also has schools in York County that are within the EPZ) Dauphin County – 7 Dauphin County – 2 Central Dauphin Dauphin Vo-Tech School Derry Township Harrisburg-Steelton-Highspire Technical School Harrisburg Lower Dauphin Middletown Area Milton Hershey School Steelton-Highspire
TMI Fact Sheet Page 4 Lancaster County – 2 Lancaster County - None Donegal Elizabeth Area Lebanon County – None Lebanon County – 1 Palmyra Area School District York County – 3 York County – 3 Central York Dover Area School District Northeastern Eastern York County School District West Shore Northern York County School District
Colleges and Universities Located in the EPZ
Dauphin County – 1
Pennsylvania State University – The Capital Campus
Lancaster County – 1
Elizabethtown College
Host Schools that Receive Relocated Student Populations
Berks County – 3
Governor Mifflin High School
Governor Mifflin Intermediate School
Governor Mifflin Middle School
Cumberland County – 5
Allen Middle School
CAIU Administrative Building
Cedar Cliff High School
Lemoyne Middle School
Washington Heights Elementary
Dauphin County – 3
Camp Curtin School
Central Dauphin Middle School
Philips Elementary School
TMI Fact Sheet Page 5 Franklin County – 1
Faust Junior High School
Lebanon County – 6
Eastern Lebanon County Middle School
Fredericksburg Elementary School
Jonestown Elementary School
Lebanon Valley College
Lickdale Elementary School
Northern Lebanon Junior/Senior High School
Lancaster County – 3
Donegal Springs Elementary School
Manheim Township High School
Manheim Township Middle School
Schuylkill County – 1
Pine Grove Middle School
York County – 3
York Learning Center
Central York Middle School
Southern York County School Complex
Cumberland County Reception Centers
Municipality Total Population/Mass Reception Center Care Requirement*
New Cumberland Borough 7,235 / 1,447 Big Spring High School
Lower Allen Township 2,354 / 471 Big Spring High School
Total Mass Care Requirement – 1,918
TMI Fact Sheet Page 6 Dauphin County Reception Centers
Municipality Total Population/Mass Reception Center Care Requirement*
Lower Paxton Township 5,957 / 1,191 Shippensburg University
Paxtang Borough 1,561 / 312 Shippensburg University
Swatara Township 23,362 / 4,673 Shippensburg University
Total Mass Care Requirement – 6,176
Lower Swatara 8,307 / 1,661 Blue Mountain High School
Middletown Borough 8,890 / 1,779 Blue Mountain High School
Royalton Borough 907 / 181 Blue Mountain High School
Total Mass Care Requirement – 3,621
Derry Township 24,651 / 4,930 Lebanon County Career and Technology Center
Total Mass Care Requirement – 4,930
Harrisburg City 5,521 / 1,104 Faust Junior High School
Highspire Borough 2,399 / 480 Faust Junior High School
Steelton Borough 5,990 / 1,198 Faust Junior High School
Total Mass Care Requirement – 2,782
Conewago Township 3,004 / 601 William Valley High School
Hummelstown Borough 4,532 / 906 William Valley High School
Londonderry Township 5,245 / 1,049 William Valley High School
South Hanover Township 6,254 / 1,251 William Valley High School
Total Mass Care Requirement – 3,807
TMI Fact Sheet Page 7 Lancaster County Reception Centers
Municipality Total Population/Mass Reception Center Care Requirement*
Conoy Township 3,194 / 639 Park City Mall
East Donegal Township 5,293 / 1,059 Park City Mall
Elizabeth Borough 11,545 / 2,309 Park City Mall
Mount Joy Township 8,132 / 1,626 Park City Mall
West Donegal Township 8,260 / 1,652 Park City Mall
Total Mass Care Requirement – 7,285
Lebanon County Reception Centers
Municipality Total Population/Mass Reception Center Care Requirement*
South Londonderry Township 825 / 165 Lebanon County Career and Technology Center
Total Mass Care Requirement – 165
York County Reception Centers
Municipality Total Population/Mass Reception Center Care Requirement*
Fairview Township 16,223 / 3,245 Gettysburg H.S. Complex
Manchester Township West (74%) 11,587 / 2,317 Gettysburg H.S. Complex
Newberry Twp. Northeast (39%) 6,003 / 1,201 Gettysburg H.S. Complex
Total Mass Care Requirement – 6,763
Warrington Township 989 / 198 Northern York County H.S.
Lewisberry Borough 362 / 72 Northern York County H.S.
Newberry Township West (24%) 3,639 / 728 Northern York County H.S.
Dover Township 1,530 / 306 Northern York County H.S.
TMI Fact Sheet Page 8 Conewago Township West (37%) 2,761 / 552 Northern York County H.S.
Total Mass Care Requirement – 1,856
East Manchester Twp. East (52%) 3,821 / 764 Red Lion High School
Hellam Township 977 / 195 Red Lion High School
Mount Wolf Borough 1,373 / 279 Red Lion High School
Springettsbury Township 345 / 69 Red Lion High School
York Haven Borough 709 / 142 Red Lion High School
Manchester Borough 2,771 / 554 Red Lion High School
Total Mass Care Requirement – 2,003
Conewago Township East (63%) 4,711 / 942 Susquehannock High School
East Manchester Twp. West (48%) 3,466 / 693 Susquehannock High School
Goldsboro Borough 942 / 188 Susquehannock High School
Manchester Twp. East (26%) 4,172 / 834 Susquehannock High School
Newberry Twp. Southeast (37%) 5,690 / 1,139 Susquehannock High School
Total Mass Care Requirement – 3,796
Grand Total – 45,102
Decontamination Centers for the General Public
County Decontamination Center Adams Gettysburg Area School Complex Cumberland Big Spring School Complex Shippensburg University Dauphin Williams Valley Jr./Sr. High School Franklin Faust Junior High School Lancaster Hempfield Senior High School Lampeter Strasburg School Complex Manheim Township School Complex Lebanon Lebanon County Career and Technology Center Schuylkill Blue Mountain High School York Read Lion School Complex Susquehannock High School
* Based on 20% planning figure.
TMI Fact Sheet Page 9
For more information contact: Name: Alan R. Brinser Email: [email protected] Voice: (717) 651-2217
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