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Shutdown is the state of a nuclear reactor when the fission reaction is slowed significantly or halted completely. Different nuclear reactor designs have different definitions for what "shutdown" means, but it typically means that the reactor is not producing a measurable amount of electricity or heat and is in a stable condition with very low reactivity.
Of these 582 reactors, 11 have suffered from serious core damage. [6] This historical data results in a 1954 to 2011 era average accident rate of 1 in every 1,309 reactor years (7.6 × 10 −4 per reactor year CDF). In five of these accidents, the damage was light enough that the reactor was repaired and restarted.
A severe earthquake (measuring 6.8 on the Richter magnitude scale) hit the region where Tokyo Electric's Kashiwazaki-Kariwa Nuclear Power Plant is located and radioactive water spilled into the Sea of Japan; as of March 2009, all of the reactors remained shut down for damage verification and repairs. The plant with seven units is the largest ...
The V.C. Summer nuclear expansion project marked what many consider the biggest construction failure in South Carolina history. The project to build two reactors to complement an existing one cost ...
Vandellòs I nuclear incident in Vandellòs (Spain), 1989; fire destroyed many control systems; the reactor was shut down. Davis–Besse Nuclear Power Station (United States), 2002; negligent inspections resulted in corrosion through 6 in (150 mm) of the carbon steel reactor head leaving only 3⁄8-inch (9.5 mm) of stainless steel cladding ...
This table lists all currently operational power stations. Some of these may have reactors under construction, but only current net capacity is listed. Capacity of permanently shut-down reactors is not included, but capacity of long-term shut-down reactors (today mainly in Japan) is included.
The Fukushima Daiichi nuclear disaster in 2011 occurred due to a loss-of-coolant accident. The circuits that provided electrical power to the coolant pumps failed causing a loss-of-core-cooling that was critical for the removal of residual decay heat which is produced even after active reactors are shut down and nuclear fission has ceased.
Workers simulated the shutdown on Tuesday of the Pilgrim Nuclear Power Station, just days before the plant will stop producing energy after 47 years of operation. On Friday, a team of workers will ...