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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.
Fresh water was used from 14 May. By 29 May water was able to be injected using a temporary pump and the Spent Fuel Pool Cooling (FPC) line. [74] [90] On 10 August, the spent fuel pool was switched from the water-injection system – that functioned some 5 months – to a circulatory cooling system. For the first time since the 11 March ...
The High Pressure Coolant Injection (HPCI) System consists of a pump or pumps that have sufficient pressure to inject coolant into the reactor vessel while it is pressurized. It is designed to monitor the level of coolant in the reactor vessel and automatically inject coolant when the level drops below a threshold.
The utility said that the hydrogen explosion at Unit 3 might have caused a glitch in the cooling system of Unit 2: Four out of five water pumps being used to cool the Unit 2 reactor had failed after the explosion at Unit 3. In addition, the last pump had briefly stopped working when its fuel ran out.
Coolant injection into reactors 1 and 3 is interrupted for 50 minutes due to a loss of power after a strong earthquake in the region. [170] Workers plan to pump water into turbine condensers, but need to pump water out of them first. Work to transfer water from the unit 2 and unit 1 condensers to a central storage tank was completed on 9 and 10 ...
Only after Trump's hush-money sentencing can NJ officials move to revoke his liquor licenses. A revocation hearing is still pending, officials said.
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[48] [49] At 4:15 a.m., the relief diaphragm of the pressurizer relief tank ruptured, and radioactive coolant began to leak into the general containment building. This radioactive coolant was pumped from the containment building sump to an auxiliary building, outside the main containment, until the sump pumps were stopped at 4:39 a.m. [49]