Fort Calhoun Nuclear Generating Station

F1

Active reactors ( gross ):

Set planning ( gross ):

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

Block 1

The reactor, built by Combustion Engineering, is a pressurized water reactor. Construction began on June 7, 1968., The output of the reactor should be 512 megawatts. On August 25, 1973, the reactor started operation. The planned operating time was 30 years. The license was renewed for 30 years in 2003, which applies to is 2033.

In 2006, parts of the system is renewed, including the reactor pressure head, pressurizer, steam generator, low-pressure turbines and the main transformers.

The nuclear power plant is located in the metropolitan area of ​​Omaha, Nebraska. In a radius of 80 kilometers of almost one million people.

Criticism

In 2010, a study of the U.S. Nuclear Regulatory (NRC ) found that the nuclear power plant is not adequately protected against flooding. 2011 structural changes were therefore made ​​and revised plans for the protection of the system with sandbags.

Has also been found in 2010 that the risk of an earthquake would destroy the reactor would be 1 to 76 923 per year. Extrapolated over a 60-year operating period, this risk is thus 1 to 1282, or about 0.1%.

Incidents

In June 2011, it came to the Mississippi flood. Due to heavy rainfall and a rise in the Missouri River, which led to a dam failure, the emergency was declared for 6 June 2011 the plant. A day later, the area was evacuated because of a fire. On 8 June 2011 was confirmed by the NRC that the fire has led to a failure of a cooling pump for the cooling ponds for spent fuel rods. This has led to a small increase of the cooling water temperature in the cooling pond. The camp is a " wet storage " or cooling ponds and requires constant cooling by circulating deionized and enriched with boron cooling water. The Fort Calhoun nuclear power plant encamped at the time of the incident fuel consumed over the past 20 years. Actually incurred damage to the electrical systems are unclear.

By no later than June 10, 2011, the power plant was directly affected and trapped by the floods. The power plant and the plants were protected from flooding only by a water-filled tube and barrier with sandbags. On 26 June 2011, the hose barrier was destroyed by a vehicle and transformers to ensure the connection to the power grid were lapped so that the power supply to the cooling had to be transferred to the emergency diesel generators. According to estimates of the flood forecasters should persist for several weeks. In several outbuildings water penetrated, as the home of the Missouri both water and groundwater came into question. Areas with radioactive material or safety-relevant devices were not affected, according to statements of the power plant manager Tim Nelle Bach. In early July, the power plant was still flushed. It was built a new water- filled tube barrier and started pumping out the water around the building.

The reactor is shut down due to the flood risk since April 2011 after an overhaul. Thus, the decay heat in the reactor core is relatively low, partly because this is now loaded with 1/3 of a new, not yet active nuclear fuel. This is a decisive factor in a possible flooding of the nuclear power station with cooling failure.

The Pakistani online news magazine "The Nation", citing the Federal Agency for Atomic Energy of Russia of information from the International Atomic Energy Agency, the U.S. government had a news blackout has ..

Data of the reactor units

The Fort Calhoun nuclear power plant has one in operation and one discarded block:

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