meltdown

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meltdown

(in a nuclear reactor) the melting of the fuel rods as a result of a defect in the cooling system, with the possible escape of radiation into the environment

meltdown

[′melt‚dau̇n]
(nucleonics)
An accident in a nuclear reactor in which melting of the fuel core occurs.

meltdown

meltdown

The total cessation of operation of a computer system or network. A system meltdown can be caused by hardware or software. A network meltdown can be caused by hardware, software or excessive traffic.