Movatterモバイル変換

[0]ホーム
URL:

Jump to content
WikipediaThe Free Encyclopedia
Search

Sequoyah Nuclear Plant

Coordinates:35°13′35″N85°5′30″W / 35.22639°N 85.09167°W /35.22639; -85.09167
From Wikipedia, the free encyclopedia
Nuclear power plant in Hamilton County, Tennessee

Sequoyah Nuclear Plant
Map
CountryUnited States
LocationHamilton County, nearSoddy-Daisy,Tennessee
Coordinates35°13′35″N85°5′30″W / 35.22639°N 85.09167°W /35.22639; -85.09167
StatusOperational
Construction beganMay 27, 1970 (1970-05-27)
Commission dateUnit 1: July 1, 1981
Unit 2: June 1, 1982
Construction cost$3.455 billion (2007 USD)[1]
OwnerTennessee Valley Authority
OperatorTennessee Valley Authority
Nuclear power station
Reactor typePWR
Reactor supplierWestinghouse
Cooling towers2 ×Natural Draft
(supplemental only)
Cooling sourceChickamauga Lake
Thermal capacity2 × 3455 MWth
Power generation
Units operational2 × 1220 MW
Make and modelWH 4-loop (ICECND)
Nameplate capacity2440MW
Capacity factor91.38% (2017)
75.50% (lifetime)
Annual net output17,654 GWh (2021)
External links
WebsiteSequoyah Nuclear Plant
CommonsRelated media on Commons

TheSequoyah Nuclear Plant is anuclear power plant located on 525 acres (212 ha) located 7 miles (11 km) east ofSoddy-Daisy, Tennessee, and 20 miles (32 km) north ofChattanooga, abuttingChickamauga Lake on theTennessee River. The facility is owned and operated by theTennessee Valley Authority (TVA).

The plant has twoWestinghousepressurized water reactors. Sequoyah units 1 & 2, as well as their sister plant atWatts Bar, both haveice condenser containment systems. In case of a largeloss-of-coolant accident, steam generated by the leak is directed toward borated ice which helps condense the steam creating a lower pressure, allowing for a smallercontainment building.

Description

[edit]

Sequoyah's two units have a winter net dependable capacity of 2,440 megawatts, making it the second most powerful plant in TVAs operating fleet.[2] Sequoyah is the second-most powerful power plant in Tennessee, after theCumberland Fossil Plant northwest of Nashville, but actually generates more power.[3]

TVA constructeddry cask storage facilities at Sequoyah and purchased special storage containers for the purpose of storingspent nuclear fuel. The storage facilities have been approved by the NRC.[2]

History

[edit]

Construction began on Sequoyah on May 27, 1970. Unit 1 was licensed by the NRC on September 17, 1980, and commercial operation began on July 1, 1981.[4][5] Unit 2 was licensed on September 15, 1981, and began operation on June 1, 1982.[6][5] Sequoyah was the first new nuclear plant licensed after theThree Mile Island accident.

On August 22, 1985, Sequoyah was shut down due to safety concerns.[7] An independent contractor hired to analyze the safety systems of the plant had found that TVA lacked documentation proving that all of the plant's safety systems would function properly in the event of an emergency.[8] Brown's Ferry, TVA's only other operating nuclear plant at the time, had been shut down in March 1985, due to safety concerns about a fire ten years earlier, and during this time, TVA was without nuclear power completely.[8]On March 22, 1988, TVA was authorized by the NRC to restart both Sequoyah units.[9] Both reactors returned to service later that year.[10]

The operating license of Sequoyah's Unit 1 was originally set to expire in 2020, and Unit 2's operating license in 2021. In 2015, the NRC renewed the operating license for both units for an additional 20 years.[11] TVA's Sequoyah operating license was modified in September 2002 to allow TVA to irradiatetritium-producing burnable absorber rods at Sequoyah for theU.S. Department of Energy. The process of irradiating tritium-producing rods produces tritium, which is used innuclear weapons and for various forms of research intonuclear fusion for commercial power production. TVA began irradiating tritium-producing rods at itsWatts Bar Nuclear Plant in 2003. As of February 2007, TVA had no plans to produce tritium at Sequoyah.[2]

Name

[edit]

Sequoyah wasCherokee, part of theOverhill Cherokee, reportedly born inTuskegee, a town at the confluence of the Tellico River andLittle Tennessee River, upriver of the nuclear power plant. He is known for creating theCherokee syllabary circa 1820. Many Cherokee sites were flooded during the TVA construction ofTellico Dam (1967-1979). Naming the site after a local Native American was considered a small political token to the Cherokee in compensation for the dam-flooding and destruction of their historic sites that TVA required to control flooding on the Tennessee River.

Electricity production

[edit]
Generation (MWh) of Sequoyah Nuclear Plant[12]
YearJanFebMarAprMayJunJulAugSepOctNovDecAnnual (Total)
20011,715,6211,547,2741,688,1821,652,2271,691,7011,626,0291,651,6661,651,4961,618,5051,416,882989,4161,700,85718,949,856
20021,712,4981,548,1291,712,6961,179,3831,020,4991,588,5791,578,6181,642,6691,605,8611,691,6561,648,0051,566,97918,495,572
20031,538,1481,549,716889,060772,530843,5041,109,8051,668,4751,585,8711,602,9561,715,3571,079,4121,248,93515,603,769
20041,194,3781,622,4961,580,7431,670,2441,716,9121,643,6891,690,0481,685,6881,644,2121,509,6331,061,4931,735,83218,755,368
20051,734,2481,464,3501,736,7551,362,460892,4971,653,2801,694,1891,687,5581,635,4441,716,1061,678,3631,743,90318,999,153
20061,682,2191,570,9141,604,2911,042,9981,274,2161,647,7541,678,1651,664,6881,633,3301,716,1091,511,763974,23218,000,679
20071,677,8551,571,2101,673,4501,668,0961,723,1371,654,0591,691,5611,676,0851,534,271898,5081,143,3441,739,10918,650,685
20081,679,1701,626,6051,735,1601,618,395947,3971,504,2511,681,6161,657,2701,639,4471,715,0451,371,1381,741,81418,917,308
20091,740,5121,569,8821,448,218821,3781,451,0441,614,9631,658,1031,666,4401,625,4771,530,500910,6631,717,35617,754,536
20101,718,9541,553,3441,651,2861,631,9621,611,0121,487,6841,656,0241,637,1601,510,126834,0891,136,9141,572,20918,000,764
20111,719,5141,553,9661,714,7201,621,1611,319,880946,4541,572,7961,578,7181,582,1981,699,0071,662,1031,717,67618,688,193
20121,718,1581,490,254810,3761,567,2101,583,7741,622,3321,654,9481,585,6661,621,5901,231,806834,276865,24016,585,630
20131,530,5581,393,0761,740,5031,662,1061,745,4131,641,3031,690,9711,680,3361,557,2441,109,7681,054,0611,720,67218,526,011
20141,723,9561,557,2211,719,0141,596,7601,083,3781,133,8961,680,2761,673,6001,625,5201,704,3341,668,5781,725,85818,892,391
20151,715,6481,559,6581,261,8191,022,3681,233,5181,633,9981,481,6011,454,3721,437,8501,669,3861,067,578973,52616,511,322
2016841,395910,0711,718,6961,654,1851,535,8661,625,3511,655,5031,644,6461,605,9921,688,9081,514,545847,45017,242,608
20171,300,0051,576,2141,717,9761,537,391848,4721,456,8601,675,5801,665,1701,630,5541,446,3871,664,3601,722,33018,241,299
20181,723,3521,506,3451,718,484987,5651,482,1221,636,9941,664,1941,666,8281,607,0221,550,238866,0691,294,53617,703,749
20191,720,4941,554,4951,717,9331,557,9311,702,7081,636,1501,675,1441,576,3881,394,3691,017,551890,8141,620,64218,064,619
20201,623,3121,612,7661,694,1621,057,3351,438,8391,642,5191,655,7881,644,4771,626,0361,709,7271,667,8411,726,38719,099,189
20211,726,9341,559,1321,723,1281,069,1041,196,3801,640,4261,678,0001,560,8251,520,846869,7821,385,3171,724,93817,654,812
20221,725,3441,558,9341,722,1221,662,0141,707,9801,413,2091,667,4901,667,0821,632,6181,371,240972,0841,727,18218,827,299
20231,727,6361,558,5901,279,8051,228,4451,709,7441,647,5681,682,3521,670,2781,623,8201,705,1081,667,9661,726,28419,227,596
20241,724,6881,615,6081,417,869819,7851,681,8281,630,9981,334,890596,777706,552202,606832,268863,40813,427,277
2025860,283779,347862,137831,153876,499877,9331,664,3721,664,2521,587,786916,710598,394--

Surrounding population

[edit]

The NRC defines two emergency planning zones around nuclear power plants: a plume exposure pathway zone of 10 miles (16 km) radius (concerned primarily with exposure to, and inhalation of, airborne radioactive contamination), and an ingestion pathway zone of about 50 miles (80 km) radius (concerned primarily with ingestion of food and liquid contaminated by radioactivity).[13]

The 2010 U.S. population within 10 miles (16 km) of Sequoyah was 99,664, according to 2010 U.S. Census data analyzed for msnbc.com, an increase of 13.8 percent in a decade.[14] The 2010 U.S. population within 50 miles (80 km) was 1,079,868 (increase of 13.8 percent).[14] Cities within 50 miles include Chattanooga (14 miles to city center).[14]

Seismic risk

[edit]

The NRC's estimate of the risk each year of an earthquake intense enough to cause core damage to the reactor at Sequoyah was 1 in 19,608, according to an NRC study published in August 2010.[15][16]

See also

[edit]

References

[edit]
  1. ^"EIA - State Nuclear Profiles".www.eia.gov. Retrieved3 October 2017.
  2. ^abcSecurities & Exchange Commission filing. Available athttps://www.sec.gov/
  3. ^"Tennessee - State Energy Profile".eia.gov. U.S. Energy Information Administration. May 17, 2018. Retrieved2018-11-02.
  4. ^"Sequoyah Nuclear Plant, Unit 1".nrc.gov. U.S. Nuclear Regulatory Commission. Retrieved2019-08-30.
  5. ^ab"Sequoyah Nuclear Plant".tva.gov. Tennessee Valley Authority. 2018. Retrieved2019-01-07.
  6. ^"Sequoyah Nuclear Plant, Unit 2".nrc.gov. U.S. Nuclear Regulatory Commission. Retrieved2019-08-30.
  7. ^George, Dan (August 23, 1985)."TVA Completes Shutdown of Sequoyah Plant".The Associated Press. New York City. Retrieved2019-01-07.
  8. ^ab"T.V.A. CITING SAFETY, TO SHUT DOWN NUCLEAR PLANT".The New York Times. New York City. Associated Press. August 22, 1985. Retrieved2019-01-07.
  9. ^"TVA GETS GREEN LIGHT TO RESTART SEQUOYAH UNIT 2".The Journal of Commerce. Hudson Yards, New York. March 23, 1988. Retrieved2019-01-07.
  10. ^Lippman, Thomas W. (April 11, 1990)."FOR TVA, IT'S BACK TO A NUCLEAR FUTURE".The Washington Post. Washington, DC. Retrieved2019-01-07.
  11. ^"Archived copy"(PDF). Archived fromthe original(PDF) on 2015-09-29. Retrieved2015-09-28.{{cite web}}: CS1 maint: archived copy as title (link)
  12. ^"Electricity Data Browser".www.eia.gov. Retrieved2025-12-03.
  13. ^"Backgrounder on Emergency Preparedness at Nuclear Power Plants".Nuclear Regulatory Commission. Retrieved2019-12-22.
  14. ^abc"Nuclear neighbors: Population rises near US reactors".NBC News. 2011-04-14. Retrieved2024-08-16.
  15. ^"What are the odds? US nuke plants ranked by quake risk".NBC News. 2011-03-16. Retrieved2024-08-16.
  16. ^"Archived copy"(PDF). Archived fromthe original(PDF) on 2017-05-25. Retrieved2011-04-19.{{cite web}}: CS1 maint: archived copy as title (link)

External links

[edit]
NRC Region I
(Northeast)
NRC Region II
(South)
NRC Region III
(Midwest)
NRC Region IV
(West)
Converted
Closed
Cancelled
(incomplete list,
whole plants only)
Future
Dams andhydroelectric
generating stations
Coal-fired power plants
Gas turbine plants
Nuclear power plants
Retrieved from "https://en.wikipedia.org/w/index.php?title=Sequoyah_Nuclear_Plant&oldid=1335080690"
Categories:
Hidden categories:
[8]ページ先頭
©2009-2026 Movatter.jp