Sequoyah Nuclear Power Plant
| Sequoyah Nuclear Power Plant | ||
|---|---|---|
 |
||
| location | ||
|
||
| Coordinates | 35 ° 13 '35 " N , 85 ° 5' 30" W | |
| Country: | United States | |
| Data | ||
| Owner: | Tennessee Valley Authority | |
| Operator: | Tennessee Valley Authority | |
| Project start: | 1968 | |
| Commercial operation: | July 1, 1981 | |
|
Active reactors (gross): |
2 (2,442 MW) | |
| Energy fed in in 2011: | 18,688 GWh | |
| Energy fed in since commissioning: | 438,030 GWh | |
| Website: | [3] | |
| Was standing: | November 10, 2012 | |
| The data source of the respective entries can be found in the documentation . | ||
The Sequoyah nuclear power plant near the city of Soddy-Daisy in the US state of Tennessee consists of two largely identical Westinghouse 4-loop pressurized water reactors and draws its cooling water from Chickamauga Lake, a reservoir created by damming the Tennessee River . To reduce the heat input into the river, the power plant has two wet-draft cooling towers.
history
The nuclear power plant is for a Cherokee - Indians named in the region lived and the first alphabet, and thus the first written form of communication invented his tribe.
The construction of the power plant started in 1969 with the first excavation work, the actual construction activities followed a year later.
In the meantime, the operator TVA has built a dry storage facility for spent fuel elements at the site. They are stored in castor- like storage containers.
In December 2016 it became known that Sequoyah was also affected by the Creusot Forge scandal over falsified certificates. Parts of the steam generator come from the polluted Areva daughter.
Accident analysis
After the Fukushima accident, the operator of the power plant, TVA, carried out accident analyzes. For example, he compares accidents in a block in Sequoyah with accidents in a block in the Browns Ferry nuclear power plant, which is also part of TVA - in contrast to the pressurized water reactor (PWR), here a boiling water reactor (BWR). He comes to the conclusion that Sequoyah has significantly lower release rates than Browns Ferry (and also Fukushima) on accident paths with rapid containment failure - for the relatively simple reason that its containment has a much larger volume and thus potentially significantly shorter can hold back more radioactive substances. Browns Ferry, it is also stated, has advantages when it comes to long-term containment failure: In this case, the large, water-filled condensation chamber of the BWR can prevent larger quantities of nuclides from being released than the one with the chemical-physical solution PWR equipped with smaller water inventories. A release path that does not exist in the BWR due to the lack of steam generators is also the steam generator heating pipe break in Sequoyah.
It is also noteworthy that the estimated collective doses of the population z. B. in the early containment failure for Sequoyah almost half of Browns Ferry despite six times less release. This is due to the external framework conditions of the respective power plant locations: At Sequoyah there are more areas with high population density in the respective main wind directions from the accident reactor than is the case at Browns Ferry (the population in an 80 km radius is for both locations about the same size).
Data of the reactor blocks
The Sequoyah nuclear power plant has two power plant blocks :
| Reactor block | Reactor type | net power |
gross power |
start of building | Network synchronization |
Commercialization of essential operation |
Shutdown (planned) |
|---|---|---|---|---|---|---|---|
| Sequoyah-1 | Pressurized water reactor | 1152 MW | 1221 MW | 05/27/1970 | 07/27/1980 | 07/01/1981 | 09/17/2040 |
| Sequoyah-2 | Pressurized water reactor | 1126 MW | 1221 MW | 05/27/1970 | December 23, 1981 | 06/01/1982 | 15.09.2041 |
Web links
See also
- List of nuclear power plants
- List of nuclear facilities in the United States
- List of the most powerful nuclear reactors