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2. Nuclear reactor safety system - Wikipedia

   en.wikipedia.org/wiki/Nuclear_reactor_safety_system

   An LPCI is an emergency system which consists of a pump that injects a coolant into the reactor vessel once it has been depressurized. In some nuclear power plants an LPCI is a mode of operation of a residual heat removal system, also known as an RHR or RHS but is generally called LPCI. It is also not a stand-alone valve or system.

3. Loss-of-coolant accident - Wikipedia

   en.wikipedia.org/wiki/Loss-of-coolant_accident

   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.

4. Three Mile Island accident - Wikipedia

   en.wikipedia.org/wiki/Three_Mile_Island_accident

   [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]

5. Head gasket - Wikipedia

   en.wikipedia.org/wiki/Head_gasket

   A leak in the head gasket - often called a "blown head gasket" - can result in a leak of coolant, the combustion gasses, or both. Blue smoke from the exhaust suggests that excess oil is entering the combustion chambers (although there are other possible causes than a head gasket leak). White smoke from the exhaust suggests that coolant is ...

6. Nuclear and radiation accidents and incidents - Wikipedia

   en.wikipedia.org/wiki/Nuclear_and_radiation...

   The coolant pumps were thus turned off to protect the pumps, which in turn led to the destruction of the reactor itself as cooling was completely lost within the core. A detailed investigation into SL-1 determined that one operator (perhaps inadvertently) manually pulled the 84-pound (38 kg) central control rod out about 26 inches rather than ...

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8. Shutdown (nuclear reactor) - Wikipedia

   en.wikipedia.org/wiki/Shutdown_(nuclear_reactor)

   In a cold shutdown, the coolant system is typically lowered to pump water at atmospheric pressure, and the reactor vessel remains below 93 °C (200 °F). This temperature is so low that the cooling water in a light-water reactor does not boil or vaporise even if the pressure in the cooling circuit drops completely. [ 6 ]

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