Browns Ferry Nuclear Power Plant

F1

Active reactors ( gross ):

The Browns Ferry nuclear power plant is a U.S. nuclear power plant, located on the Tennessee River near Decatur and Athens, Alabama, on the north side (right bank ) of Wheeler Lake. The plant is named after a ferry that operated on the site until the mid- 20th century. The facility has three General Electric boiling water reactors. The owner and operator is the Tennessee Valley Authority. The power plant has single-row cells cooler.

Block 1

Block 1 is a boiling water reactor from General Electric with a net electrical output of 1065 MWe and a gross capacity of 1152 MWe. Construction began on May 1, 1967 he was first synchronized on 15 October 1973 with the electricity grid and went on 1 August 1974 in commercial operation.

Fire 1975

On March 22, 1975, a technician, was the patrol looking for an air leak around with a candle in the power plant. The foam, with which the cabling were protected, caught fire, causing an electrical fire. The fire on the other side of the wall (from the perspective of the ignition seen ) was not detected until considerable damage to cables associated with the control of units 1 and 2 had occurred. In Unit 2, worked to shut down only a single emergency cooling system, in block 1 none at more: In all these systems, the power supply to the pumps had been paralyzed by the fire. In an emergency, you could in block 1 two so-called condensate pumps ( a normal operating system, which is actually not qualified for emergencies), whose power was not affected in the turbine building of the fire because of its location pretty rear, set in motion again and - after shutdown of the reactor - remove decay heat with it. About five hours later, resulted in block 1 is another problem: The pressure relief valves of the reactor system refused to serve her. That is not relatively quickly hired an accident here was due to the fact that the decay heat had previously been discharged five hours, the core was therefore already cooled down halfway. They had so plenty of time to cure the defect in the electronics.

This fire resulted later in the American regulatory authority Nuclear Regulatory Commission (NRC ) to great discussions and to substantially improve fire safety in all U.S. nuclear power plants as well as worldwide. The polyurethane foam for cable sheathing was replaced in all power plants by silicone foam. In addition, the cable strands of the individual safety systems were much more consistently separated from each other, so not all redundancies could be simultaneously affected by fire. It was in this case even two blocks prone to accidents at once.

The reactor was March 22, 1975 to May 24, 2007 out of service. Before re-starting the reactor for $ 1.8 billion was overhauled. The fact that the old system was ever taken again into service, was, according to a lawyer is that the approval process was thus much easier. The final decommissioning of Unit 1 is scheduled for 2033.

Block 2

Block 2 is also a General Electric boiling water reactor, but gross with a capacity of 1118 MWe net and 1155 MWe. Construction began on May 1, 1967, the first network synchronization took place on 28 August 1974, he took on March 1, 1975 commercial operation on. Since 2005, the Unit 2 is loaded with low-enriched uranium.

Because of the, caused by a drought period, rapidly rising water temperature of the Tennessee River, and thus an increased temperature of the coolant, the reactor was shut down in August 2007 for one day.

The shutdown is scheduled for 2034.

Block 3

Also, block 3 is a General Electric boiling water reactor and has a net output of 1114 MWe and a gross capacity of 1190 MWe. Construction began on 1 July 1968, he was first synchronized on 12 September 1976 by the power supply and went on 1 March 1977 in commercial operation. The shutdown is scheduled for 2036.

Disorders

On April 27, 2011, all three blocks were shut down automatically after strong storms had damaged parts of the interconnected system in the region. The safety systems of the three blocks functioned as designed. The power supply was taken from the emergency diesel generators.

Data of the reactor units

The Browns Ferry nuclear power plant has three blocks:

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