Why is reactor fuel moved under water?
Switching off a reactor does not immediately remove the heat from its used fuel. In the water-cooled transfer arrangement described by the US Department of Energy, fuel stays underwater as it moves to a storage pool. Water provides cooling and radiation shielding during a journey that still matters after the chain reaction has stopped.
Questions you could explore
- Why does stopping a chain reaction not remove the need for cooling?
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- US Department of Energy, Office of Nuclear EnergyNuclear Fuel Cycle 101: Wet Storage
Explains why used fuel still needs cooling and describes its underwater transfer from a reactor to a spent-fuel pool.
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