Nuclear meltdown

Definition

A nuclear meltdown refers to a severe nuclear reactor accident where the reactor's core overheats, causing the fuel rods to melt. This can lead to the release of radioactive materials into the environment.

Related terms

Radiation leak: A radiation leak occurs when radioactive materials escape from their containment and are released into the surrounding environment.

Containment vessel: The containment vessel is a thick concrete structure that surrounds a nuclear reactor to prevent radioactive materials from escaping in case of an accident.

Core meltdown sequence: The core meltdown sequence refers to the series of events that occur during a nuclear meltdown, starting with loss of coolant and ending with fuel rod melting.