Definition

Noun: A nuclear meltdown is a severe nuclear reactor accident where the reactor's core overheats catastrophically, causing the fuel rods and core materials to melt. This can breach the containment structure, potentially releasing radioactive materials into the environment.

Usage

The term is used to describe a specific, disastrous failure in a nuclear power plant. It is a technical term but widely understood in general discourse concerning nuclear safety and major accidents. * The investigation focused on the causes of the nuclear meltdown. * Preventing a nuclear meltdown is the top priority of reactor safety systems. * The documentary detailed the events leading to the nuclear meltdown.

Advanced Usage

• Core meltdown or meltdown are often used synonymously with "nuclear meltdown" in technical and news contexts.
  • Engineers worked frantically to avert a full core meltdown.
• The term "meltdown" alone is also commonly used metaphorically to describe any situation of catastrophic collapse or a person having an extreme emotional outburst.
  • The project experienced a complete financial meltdown. (Metaphorical use)
  • The toddler had a meltdown in the grocery store. (Metaphorical use)

Variants and Related Words

• Meltdown (n): The shortened, more common form. Can refer specifically to the nuclear event or be used metaphorically.
• Core Meltdown (n): A more technical variant emphasizing the melting of the reactor core.
• Nuclear Accident (n): A broader term that includes meltdowns and other types of reactor failures.
• China Syndrome (n): A hypothetical, informal term for an extreme meltdown where the core melts through its containment and deep into the earth.

Synonyms

• Catastrophic reactor failure
• Core melt accident

Related Phrases

• Partial meltdown: Refers to a situation where only part of the reactor core melts.
  • The accident was classified as a partial meltdown.
• To suffer a meltdown: The verbal phrase used to describe a reactor undergoing this process.
  • The reactor was at risk of suffering a meltdown.

Noun

1. severe overheating of the core of a nuclear reactor resulting in the core melting and radiation escaping