China syndrome

Chi·na syn·drome

noun

A hypothetical kind of catastrophic failure in which a nuclear reactor melts through the floor of its containment system and (if on land) penetrates the Earth's surface, continuing downward as if (from a Western Hemispheric point of view) traveling through the planet toward China.

Meanings

China syndrome1

nounChina syndrome (countable and uncountable, plural China syndromes)

plural China syndromes · alternative China Syndrome

  1. idiomaticuncountablenuclear physicsA hypothetical kind of catastrophic failure in which a nuclear reactor melts through the floor of its containment system and (if on land) penetrates the Earth's surface, continuing downward as if (from a Western Hemispheric point of view) traveling through the planet toward China.

    The molten mass did not even fully penetrate the 0.5-cm cladding, confirming tests in Karlsruhe, Germany, and in Idaho, that the "China syndrome" is not a credible possibility.

    2002 September 20, Douglas M. Chapin, Karl P. Cohen, W. Kenneth Davis, Edwin E. Kintner, Leonard J. Koch, “Nuclear Power Plants and Their Fuel as Terrorist Targets”, in Science, volume 297, number 5589, →DOI, →ISSN, pages 1997–1999
    2 more examples

    The Ergen report contains an analysis showing that the high-temperature mass would sink into the earth and grow in size for about two years. […] This behavior projection is known as the China syndrome.

    1971 December 12, Ralph E. Lapp, “Thoughts on Nuclear Plumbing.”, in The New York Times, →ISSN, page E11

    Dr. Lowell: If that's true, we came very close to the China Syndrome. Kimberly Wells: The what? Dr. Lowell: If the core is exposed for whatever reason, the fuel heats beyond core heat tolerance in a matter of minutes. Nothing can stop it. And it melts down right through the bottom of the plant, theoretically to China. But of course, as soon as it hits ground water, it blasts into the atmosphere and sends out clouds of radioactivity.

    1979, Mike Gray, T. S. Cook, James Bridges, The China Syndrome
  2. countableidiomaticnuclear physicsA specific instance of this type of failure.

    Contrary to accounts in the media, he states, "bugs of this nature don't cause China Syndromes or missile launches, at least not generally."

    2000 January 11, Stan Sesser, “Now It's Time to Figure Out Who Caused All the Y2K Fuss”, in Wall Street Journal, →ISSN
    2 more examples

    The report judged the risks of catastrophic nuclear power plant accidents (known as core meltdowns or China syndromes) to be socially acceptable.

    1983, Dorothy S. Zinberg, chapter I, in Uncertain Power: The Struggle for a National Energy Policy, →ISBN, page 43

    Ames maneuvered the Avalon around the Alfa's bow, working the directional propeller carefully and adjusting trim to cruise down the other side, actually the top of the dead sub. "See any evidence of a hull fracture?" "No," the ensign answered, "just the two burn-throughs. I wonder what went wrong?" "A for-real China Syndrome. It finally happened to somebody." Ames shook his head. If there was anything the navy preached about reactors, it was safety. "Get the transducer against the hull. We'll see if anybody's alive in there."

    1984, Tom Clancy, “The Thirteenth Day: Wednesday, 15 December”, in The Hunt for Red October, Annapolis, Maryland: Naval Institute Press, →ISBN, pages 303–304
  3. countableidiomaticsometimes fancifulA behavior, policy, or situation characteristic of or involving China; an actual or potential catastrophe, especially one involving China.

    And then there is the China syndrome. […] China now represents about 20% of Korea's total trade.

    2005, Justin Lahart. "Ahead of the Tape," Wall Street Journal (Eastern ed.), 6 Oct., p. C1
  4. countableuncountablemedicineA rare disease, first characterized in the early 1990s, which resembles polio but which has somewhat different characteristics and occurs in persons vaccinated for polio.

    Unlike poliomyelitis, paralysis in China syndrome is symmetrical. In addition, cases are seasonal.

    2006, Pan American Health Organization, chapter I, in Poliomyelitis Eradication: Field Guide, →ISBN, page 49

China Syndrome2

nounChina Syndrome (countable and uncountable, plural China Syndromes)

plural China Syndromes

  1. alternativecountableuncountableAlternative form of China syndrome.

Origin

From China + syndrome. Popularized via the 1979 disaster thriller film The China Syndrome.

Full word history & related roots →

Translations

Chinese Mandarin 中國綜合症 /中国综合症
  • 中國綜合症 /中国综合症 (Zhōngguó zònghézhèng)meltdown of a nuclear reactor
Finnish Kiina-ilmiö
  • Kiina-ilmiömeltdown of a nuclear reactor
French syndrome chinois
  • syndrome chinoismeltdown of a nuclear reactor
German China-Syndrom
  • China-Syndrommeltdown of a nuclear reactor
Italian sindrome cinese
  • sindrome cinesemeltdown of a nuclear reactor
Japanese チャイナ・シンドローム
  • チャイナ・シンドローム (China shindorōmu)meltdown of a nuclear reactor
Polish chiński syndrom
  • chiński syndrommeltdown of a nuclear reactor
Portuguese síndrome da China
  • síndrome da Chinameltdown of a nuclear reactor
Russian кита́йский синдро́м
  • кита́йский синдро́м (kitájskij sindróm)meltdown of a nuclear reactor
Cite this entry
APA

China syndrome. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/China%20syndrome

MLA

“China syndrome.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/China%20syndrome. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “China syndrome,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/China%20syndrome.

Source: China syndrome on Wiktionary, CC BY-SA 4.0.