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meltdown

meltdown

30 7.4
Severe overheating of a reactor core that makes it melt and release radiation
  • noun
  • /ˈmɛltdaʊn/
  • Specialized
translation icon : fusión del núcleo
  • There was a meltdown in reactors three and four and the government tried to hush it up, but was unsuccessful.
  • nuclear meltdown
  • reactor meltdown

Without the meltdown, without the nuclear waste.

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Examples

  • The scientists monitored the reactor closely to prevent a meltdown after detecting a rise in temperature.

  • But if there were a complete meltdown, what about the steam being released into the air?

    Blog text (20)
  • Start the core meltdown and get out of there.

  • Just press one more, and the meltdown will begin.

  • It's a core meltdown, sir.

  • There was a meltdown at the plant, so they gave me the afternoon off.

  • There could be a core meltdown in 33 minutes.

  • Many hours passed before the operators realized that the facility they were standing in had entered into partial core meltdown.

    Academic text (2012)
  • A nuclear reactor meltdown occurred at Chernobyl in 1986.

    Academic text (1996)
  • According to the news reports, thousands of Harrisburg residents were threatened by an "imminent meltdown" and by the radiation vented into the atmosphere.

    Academic text (1995)

Synonyms

nuclear meltdown
vsmeltdown
  • Specialized
5 7.2

A very dangerous accident in a nuclear power plant when the reactor gets too hot and releases radiation

is the same meaning but uses the shorter, less explicit form

Compounds

nuclear meltdown
  • Specialized
5 7.2

A very dangerous accident in a nuclear power plant when the reactor gets too hot and releases radiation

How Severe

meltdown
  • Specialized
30 7.4
overheating
8 3.7

Surface Forms

meltdown singular
meltdowns plural

Morphology

meltdown = melt + down (transparent) = melt + down

The noun comes from the verb phrase 'melt down' referring to the physical melting of the reactor core, so the formation and meaning are literal and straightforward.

Etymology

Meltdown comes from the two simple English parts melt ('to become liquid from heat') and down ('down'), and it was used for a nuclear reactor whose hot core can literally melt and fall apart. So a nuclear meltdown is when the reactor's core melts and causes very serious damage.