Limerick Nuclear Power Plant
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|Limerick Nuclear Power Plant|
NRC image of Limerick Generating Station, Units 1 & 2.
|Location||Limerick Township, Pennsylvania|
|Commission date||Unit 1: February 1, 1986
Unit 2: January 8, 1990
|Licence expiration||Unit 1: October 26, 2024
Unit 2: June 22, 2029
|Reactor supplier(s)||General Electric|
|Power generation information|
|Installed capacity||Unit 1: 1,134 MW
Unit 2: 1,134
|Annual generation||Unit 1: 9,994 GWh
Unit 2: 9,059
The Limerick Generating Station in Pennsylvania is located next to the Schuylkill River in Limerick Township, Montgomery County, northwest of Philadelphia. The facility has two General Electric boiling water reactor (BWR) units, cooled by natural draft cooling towers. When conditions are right, these cooling towers emit enough water vapor to be seen as far away as Centralia in Columbia County.
The two units are capable of producing almost 1,200 megawatts of power each, which combined would provide electricity to over 2 million households. Exelon Corporation owns and operates this facility.
For critical standby power, Exelon depends on eight Fairbanks Morse Opposed Piston 38D 8 1/8 Emergency Diesel Generator sets that deliver 26 MW of power and are capable of achieving rated speed within ten seconds of start.
Surrounding population 
The Nuclear Regulatory Commission defines two emergency planning zones around nuclear power plants: a plume exposure pathway zone with a radius of 10 miles (16 km), concerned primarily with exposure to, and inhalation of, airborne radioactive contamination, and an ingestion pathway zone of about 50 miles (80 km), concerned primarily with ingestion of food and liquid contaminated by radioactivity.
The 2010 U.S. population within 10 miles (16 km) of Limerick was 252,197, an increase of 18.7 percent in a decade, according to an analysis of U.S. Census data for msnbc.com. The 2010 U.S. population within 50 miles (80 km) was 8,027,924, an increase of 6.1 percent since 2000. Cities within 50 miles include Philadelphia (28 miles to city center).
The site was chosen and plans to build the station were announced in 1969, by the Philadelphia Electric Company (now PECO Energy, a subsidiary of Exelon). It is located approximately one mile south of Sanatoga, PA. Community protests by the Keystone Alliance and other delays pushed the start of construction by the Bechtel Power Corporation to June 1974.
Limerick Unit 1 first attained criticality (began producing nuclear power, at limited capacity) on December 22, 1984 and was certified for commercial operation on February 1, 1986.
Limerick Unit 2 attained criticality on August 1, 1989, and commercial operation began on January 8, 1990.
Former President George W. Bush visited the Limerick Generating Station in May 2006 to discuss nuclear power and its role in the Advanced Energy Initiative, which he announced at the 2006 State of the Union Address. He toured the facility, including a trip to the control room of the plant.
In 1984, a worker repeatedly triggered contamination alarms as he entered the plant; subsequent investigation showed the contamination's origin to be not the plant but radon in the worker's home (see Health effects of radon).
In May 2011, a glitch shut down a reactor at the plant twice.
Seismic risk 
The Nuclear Regulatory Commission's estimate of the risk each year of an earthquake intense enough to cause core damage to the reactor at Limerick was 1 in 18,868, according to an NRC study published in August 2010. Following the Fukushima Daiichi nuclear disaster in 2011, government regulators announced the plant would undergo further evaluations for seismic activity risk.
See also 
- Bill Dedman, Nuclear neighbors: Population rises near US reactors, msnbc.com, April 14, 2011 http://www.msnbc.msn.com/id/42555888/ns/us_news-life/ Accessed May 1, 2011.
- President Discusses Energy During Visit to Nuclear Generating Station in Pennsylvania
- "Limerick Reactor Shuts Down", Daily Local. June 1, 2011. Accessed June 14, 2011
- Bill Dedman, "What are the odds? US nuke plants ranked by quake risk," msnbc.com, March 17, 2011 http://www.msnbc.msn.com/id/42103936/ Accessed April 19, 2011.
- "American Nuclear Power Under Scrutiny After Disaster In Japan", CBS Philadelphia. March 14, 2011. Accessed June 14, 2011
|Wikimedia Commons has media related to: Limerick Nuclear Power Plant|
- DoE Page
- Nuclear Tourist page on this site.
- NRC page, listing new reactor applications. Includes many more than the "Future" list below.