Fort Calhoun Nuclear Power Plant

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Fort Calhoun Nuclear Power Plant
location
Coordinates	41 ° 31 '11 "  N , 96 ° 4' 44"  W Coordinates: 41 ° 31 '11 "  N , 96 ° 4' 44"  W.
Country:	United States
Data
Owner:	Omaha Public Power District (OPPD)
Operator:	Exelon
Project start:	1966
Commercial operation:	26 Sep 1973
Shutdown:	Oct 24, 2016
Decommissioned reactors (gross):	1 (512 MW)
Planning set (gross):	1 (1182 MW)
Energy fed in since commissioning:	99,927 GWh
Was standing:	March 18, 2008
The data source of the respective entries can be found in the documentation .

The decommissioned nuclear power station Fort Calhoun ( english Fort Calhoun Nuclear Generating Station ) with a pressurized water reactor is near Fort Calhoun in the State of Nebraska on the Missouri River , a tributary of the Mississippi River .

owner

It is owned and operated by the Omaha Public Power District (OPPD). In August 2012, the OPPD announced that Fort Calhoun would be operated by Exelon Nuclear Partners , a subsidiary of Exelon .

Block 1

The reactor, built by Combustion Engineering , is a pressurized water reactor . Construction began on June 7, 1968. The reactor should have a capacity of 512 megawatts. The reactor went into operation on August 25, 1973. In 2006, parts of the system were renewed, including the reactor print head, pressurizer, steam generator, low-pressure turbines and the main transformers.

The nuclear power plant is located in the metropolitan area of Omaha, Nebraska . Almost a million people live within a radius of 80 kilometers. The power plant was shut down on October 24, 2016.

criticism

In 2010 an investigation by the US Nuclear Regulatory Authority ( NRC ) found that the nuclear power plant was not adequately protected against flooding. In 2011, structural changes were made and the plans to protect the facility with sandbags were revised.

It was also determined in 2010 that the risk of an earthquake that would destroy the reactor would be 1 in 76,923 per year. Extrapolated over a 60-year period of operation, this risk is 1 in 1282, i.e. about 0.1%.

Incidents

Power plant shot in by the floods on June 16, 2011

In June 2011 the Mississippi flood occurred . Due to heavy rainfall and a rise in the Missouri River, which led to a dam burst, a state of emergency was declared for the plant on June 6, 2011. A day later, the site was evacuated due to a fire. On June 8, 2011, the NRC regulatory agency confirmed that the fire had resulted in a failure of a cooling pump for the spent fuel pool . This has led to a slight increase in cooling water temperatures in the cooling pool. The store is a so-called "wet store " or cooling pool and requires constant cooling by circulating deionized and boron- enriched cooling water. At the time of the incident, the Fort Calhoun nuclear power plant was storing fuel that had been used up for the past 20 years. The actual damage to the electrical systems is unclear.

By June 10, 2011 at the latest, the power plant was directly affected and trapped by the floods. The power plant and the facilities were only protected from flooding by a hose barrier filled with water and sandbags. On June 26, 2011, the hose barrier was destroyed by a vehicle and the transformers that ensure the connection to the power grid were washed around, so that the power supply for the cooling system had to be transferred to the emergency diesel generator sets. According to estimates by meteorologists, the tide should last for several weeks. Water seeped into several outbuildings, both water from the Missouri and groundwater were possible sources. Areas with radioactive material or safety-relevant devices were not affected, according to the power plant manager Tim Nellenbach. At the beginning of July, the power plant was still flooded. A new water-filled hose barrier was erected and the pumping out of the water around the buildings began.

Due to the danger of flooding, the reactor has been shut down since April 2011 after an overhaul. As a result, the decay heat in the reactor core is relatively low, also because it is now equipped with 1/3 new, not yet active nuclear fuel . This is one of the decisive factors in the event that the nuclear power plant is flooded and the cooling system fails.

The reactor went back online in December 2013 after the Nuclear Regulatory Commission (NRC) had given permission.

Operating license

In the USA, the operating license for a nuclear power plant is initially issued by the NRC for a period of up to 40 years. The 40 year period was originally based on the fixed asset depreciation period . The Atomic Energy Act of 1954 allows the operating license to be extended (even several times) by 20 years at a time.

The original operating license was granted to the then operator Omaha Public Power District on August 9, 1973 by the NRC. It was extended on November 4, 2003 to August 9, 2033.

Shutdown

On June 16, 2016, the OPPD announced that Fort Calhoun would be shut down for good by the end of 2016. The costs of decommissioning are 1.2 billion USD appreciated. The nuclear power plant was finally shut down on October 24, 2016.

Data of the reactor blocks

Fort Calhoun Nuclear Power Plant has one decommissioned and one abandoned block :

Reactor block	Reactor type	net power	gross power	start of building	Network synchronization	Commercialization of essential operation	operating permit	switching off processing
Fort Calhoun-1	Pressurized water reactor	478 MW	512 MW	06/07/1968	08/25/1973	09/26/1973	08/09/2033	October 24, 2016
Fort Calhoun-2	Pressurized water reactor	1136 MW	1182 MW				-	Planning abandoned on 02/01/1977

See also

• List of nuclear power plants

Web links

Commons : Fort Calhoun Nuclear Power Plant  - Collection of images, videos and audio files

Individual evidence

1. ↑ ^{a b} Fort Calhoun restarts after extended outage. www.world-nuclear-news.org, December 19, 2013, accessed on August 21, 2016 .  
2. ↑ Ft. Calhoun Plant To Be Managed By Private Company. (No longer available online.) Www.wowt.com, August 16, 2012, formerly in the original ; accessed on August 21, 2016 (English).  ( Page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.    
3. ↑ Ticker of the operator from June 10, 2011  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.  
4. ↑ Pictures of the flooded nuclear power plant
5. ↑ Flood test not over for nuke plant. In: Omaha World Herald. Retrieved June 29, 2011
6. ↑ The 2000 foot long aqua berm holding back the Missouri River flood waters at the Fort Calhoun Nuclear Plant collapsed at 1:30 AM on June 26th.
7. ↑ ^{a b} The latest on flooding: July 11. In: Omaha World-Herald. July 11, 2011, accessed July 14, 2011
8. ↑ Missouri floods threaten US nuclear power plants. on: sueddeutsche.de
9. ↑ Fort Calhoun Nuclear Plant: Flood Seeps Into Turbine Building At Nebraska Nuke Station. ( Memento of the original from March 10, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. In: Huffington Post. June 27, 2011, accessed July 14, 2011 
10. ^ Backgrounder on Reactor License Renewal. Nuclear Regulatory Commission (NRC), accessed August 18, 2016 .  
11. ^ Subsequent License Renewal Background. NRC, accessed August 18, 2016 .  
12. ↑ Fort Calhoun Station. NRC, accessed August 18, 2016 .  
13. ↑ OPPD board votes to decommission Fort Calhoun Station. (No longer available online.) Omaha Public Power District (OPPD), June 16, 2016, archived from the original on August 22, 2016 ; accessed on August 18, 2016 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.   
14. ↑ Fort Calhoun-1 Shut Down Permanently After 43 Years Of Operation. NucNet, October 25, 2016, accessed November 1, 2016 .  
15. ↑ End of operations for Fort Calhoun. Nuclear Forum Switzerland, October 31, 2016, accessed on November 1, 2016 .  
16. ↑ Power Reactor Information System of the IAEA : "United States of America: Nuclear Power Reactors - Alphabetic" (English)
17. ↑ The Fort Calhoun-2 nuclear power plant in the IAEA's PRIS ( Memento from June 4, 2011 in the Internet Archive )