Date in year · 1946 · The 1940s

December 25, 1946

On December 25, 1946, the first European self-sustaining nuclear chain reaction is initiated within the Soviet Union's F-1 nuclear reactor. Hayley Mills, Tim Curry, Steven L. Bennett would arrive in the same year.

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1946

1940s

Around 1946

The year in brief

1946 (MCMXLVI) was a common year starting on Tuesday of the Gregorian calendar, the 1946th year of the Common Era (CE) and Anno Domini (AD) designations, the 946th year of the 2nd millennium, the 46th year of the 20th century, and the 7th year of the 1940s decade.

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What happened

On December 25, 1946

  1. 1946 The first European self-sustaining nuclear chain reaction is initiated within the Soviet Union's F-1 nuclear reactor.

    When one nuclear reaction causes more

    In nuclear physics, a nuclear chain reaction occurs when one single nuclear reaction causes an average of one or more subsequent nuclear reactions, thus leading to the possibility of a self-propagating series or "positive feedback loop" of these reactions. The specific nuclear reaction may be the fission of heavy isotopes. A nuclear chain reaction releases several million times more energy per reaction than any chemical reaction.

Elsewhere that year

Other moments from 1946

The class of 1946

Others born in 1946

Hayley Mills 1946– English actress
Tim Curry 1946– English actor and singer
Steven L. Bennett 1946– American captain and pilot, Medal of Honor recipient (died 1972)
Paul Davies 1946– English physicist and author
Louise Harel 1946– Canadian lawyer and politician
Archy Kirkwood 1946– Baron Kirkwood of Kirkhope, Scottish lawyer and politician

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