Salem Nuclear Power Plant

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Salem Nuclear Power Plant
Hope Creek-Salem Nuclear.jpg
The entire PSEG nuclear complex as seen from Augustine Beach, Delaware.
CountryUnited States
LocationLower Alloways Creek, Salem County, New Jersey
Coordinates39°27′46″N 75°32′8″W / 39.46278°N 75.53556°W / 39.46278; -75.53556Coordinates: 39°27′46″N 75°32′8″W / 39.46278°N 75.53556°W / 39.46278; -75.53556
Construction beganSeptember 25, 1968 (1968-09-25)
Commission dateUnit 1: June 30, 1977
Unit 2: October 13, 1981
Construction cost$4.283 billion (2007 USD)[1]
Owner(s)Exelon (43%)
PSEG (57%)
Nuclear power station
Reactor typePWR
Reactor supplierWestinghouse
Cooling sourceDelaware River
Thermal capacity2 × 3459 MWth
Power generation
Units operational1 × 1169 MW
1 × 1158 MW
Make and modelWH 4-loop (DRYAMB)
Nameplate capacity2327 MW
Capacity factor88.55% (2017)
70.50% (lifetime)
Annual net output18,050 GWh (2017)
External links
WebsiteSalem Generating Station
CommonsRelated media on Commons

The Salem Nuclear Power Plant is a two unit pressurized water reactor nuclear power plant located in Lower Alloways Creek Township, in Salem County, New Jersey, in the United States. It is owned by PSEG Nuclear LLC and Exelon Generation LLC.


Salem shares an artificial Island in the Delaware Bay with the Hope Creek Nuclear Power Plant.[2]


The reactors, both PWRs, were built by Westinghouse, and began commercial operation in 1977 (Unit 1) and 1981 (Unit 2). The two-unit plant has a capacity of 2,275 MWe. Unit 1 is licensed to operate until August 13, 2036 and Unit 2 is licensed to operate until April 18, 2040. In 2009, PSEG applied for 20-year license renewals for both units, which were approved by the NRC in 2011.[3][4]

Surrounding population[edit]

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.[5]

The 2010 U.S. population within 10 miles (16 km) of Salem was 52,091, an increase of 54.1 percent in a decade, according to an analysis of U.S. Census data for The 2010 U.S. population within 50 miles (80 km) was 5,482,329, an increase of 7.6 percent since 2000. Cities within 50 miles include Philadelphia (43 miles to city center).[6]

Safety issues[edit]

The New York Times has reported that, in the 1990s, the Salem reactors were shut down for two years because of maintenance problems.[7] Consultants found several difficulties, including a leaky generator, unreliable controls on a reactor, and workers who feared that reporting problems would lead to retaliation. In 2004, the Nuclear Regulatory Commission took on additional oversight of the Salem plants and increased the monitoring of them.[7]

An extensive investigation by the Nuclear Regulatory Commission, and the subsequent review by hired consultants have found many minor problems, such as lack of routine maintenance and low morale among personnel, but declared the plant safe.[8]

On Thursday, August 22, 2013, the Salem Nuclear plant was shut down after a leak of slightly radioactive water. The spill was confined to the plant's containment building, and regulators have said there is no risk to the public.[9] The plant restarted on August 24, after having been shut down for less than 48 hours.[10]

In May 2014 a scheduled refueling outage of Salem 2 was extended after broken bolts from a cooling pump were found in the reactor vessel. Westinghouse dispatched a team to inspect the pumps.[11] The inspection revealed bolts in the bottom of the cooling pumps as well as the bottom of the reactor vessel. Unit 2 was returned to service on July 11, 2014.[12]

Seismic risk[edit]

The Nuclear Regulatory Commission's estimate of the risk each year of an earthquake intense enough to cause core damage to the reactor at Salem was 1 in 90,909, according to an NRC study published in August 2010.[13][14]

Water use[edit]

Salem Nuclear Power Plant as photographed from Delaware Bay.

Both reactors use Delaware Bay as a source of cooling water. Salem units 1 and 2 have a water-intake building with a rotating screen to collect debris that is later washed off. Sometimes thick layers of grass clog the intakes and the reactors run at reduced power for weeks as a result.[15][16] All of the waste heat produced in the steam cycle (about 2 gigawatts) is dumped into the bay. The resultant increase in water temperature is regulated to less than 1 °C in summer months, and to 2 °C the rest of the year. The large closed-cycle cooling tower on site is part of the neighboring Hope Creek plant and is not used by the Salem reactors.[17]

Notable employees[edit]

Actor Bruce Willis worked at Salem Nuclear Power Plant as a security guard before pursuing acting.[18]


  1. ^ "EIA - State Nuclear Profiles". Retrieved 3 October 2017.
  2. ^ Special to Today's Sunbeam/PSEG Nuclear. "NRC delays review of PSEG Nuclear permit application needed for any new reactor in Salem County". Retrieved 2012-02-08.
  3. ^ "PSEG seeks licence renewals for two plants". World Nuclear News. August 19, 2009. Retrieved 2009-08-18.
  4. ^ Gallo, Bill Jr. (June 30, 2011). "Nuclear Regulatory Commission grants 20-year operating license extensions for Salem 1 and 2 reactors in Salem County". Today's Sunbeam. Retrieved 30 June 2011.
  5. ^ "NRC: Backgrounder on Emergency Preparedness at Nuclear Power Plants". Retrieved 2012-02-08.
  6. ^ Bill Dedman, Nuclear neighbors: Population rises near US reactors,, April 14, 2011 Accessed May 1, 2011.
  7. ^ a b Creating the Nation's Largest Utility Company, New York Times, January 29, 2006.
  8. ^ Sullivan, John (October 11, 2004). "Problems cited at nuclear plant in South Jersey". New York Times.
  9. ^ ABC 6 Action News, August 23, 2013
  10. ^ NBC news, August 24, 2013
  11. ^ Bill Gallo (19 May 2014). "Broken bolt pieces found in pump, reactor vessel delay Salem 2 nuclear plant restart". South Jersey Times. Retrieved 21 May 2014.
  12. ^
  13. ^ Bill Dedman, "What are the odds? US nuke plants ranked by quake risk,", March 17, 2011 Accessed April 19, 2011.
  14. ^ Patrick Hiland, Chairman (September 2, 2010). Memorandum To: Brian W. Sheron, Director Office of Nuclear Regulatory Research (PDF) (Report).
  15. ^ Wald, Matthew L. (May 1, 1994). "U.S. team finds errors at Salem Nuclear Plant". New York Times. Archives.
  16. ^ Jeff Montgomery (22 April 2011). "Delaware energy: Grasses force Salem plant shutdown". News Journal. Wilmington, Delaware: Gannett. DelawareOnline. Retrieved 23 April 2011.
  17. ^ FR Doc E7-20761
  18. ^ Comment on The Daily Show, June 26, 2007.

External links[edit]