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Primary coolant leak Primary coolant leak on board the submarine USS Guardfish while underway [75] 1975 Location unknown Contamination Radioactive resin contaminates the American Sturgeon-class submarine USS Guardfish after wind unexpectedly blows the powder back towards the ship. The resin is used to remove dissolved radioactive minerals and ...
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.
The Reactor Protection System (RPS) is a system, computerized in later BWR models, that is designed to automatically, rapidly, and completely shut down and make safe the Nuclear Steam Supply System (NSSS – the reactor pressure vessel, pumps, and water/steam piping within the containment) if some event occurs that could result in the reactor entering an unsafe operating condition.
However, uncooled EGR designs do exist; these are often referred to as hot-gas recirculation (HGR). Cooled EGR components are exposed to repeated, rapid changes in temperatures, which can cause coolant leak and catastrophic engine failure. [9] [10] Unlike spark-ignition engines, diesel engines are not limited by the need for a contiguous ...
When workers tried to restart the unit, they discovered a small leak in the reactor coolant pump. [27] On December 21, 2009 the Unit 3 reactor tripped and shut down for longer than 72 hours. [28] On July 27, 2009, the Unit 2 reactor tripped and shut down for longer than 72 hours.
The same was done for reactor No. 3, where 5 tons were added, bring the total to 12 tons per hour. TEPCO also added that the volume of cooling water into the No. 1 reactor would be increased as necessary. [47] On 18 April 2011, remote control robot was used to enter the Reactor Building and performed a series of inspections. [48]
Get the Boydton, VA local weather forecast by the hour and the next 10 days.
The leak area was inspected using Canadarm2 as well as photographs taken after undocking. The incident resulted in a delay of Soyuz MS-23 launch, needed to replace Soyuz MS-22 that had a leak several months prior. [77] October 9: A leak from one of Nauka Multipurpose Laboratory Module radiators was observed with the ISS cameras and visual ...