IMD

Oracle

722d7339signed

In what year did the first controlled nuclear chain reaction, Chicago Pile-1, take place? Answer with the four-digit year only.

Answer

1,942

1942 uint256

year
calendar year (Gregorian, UTC) in which Chicago Pile-1 first achieved a self-sustaining, controlled nuclear chain reaction, i.e. reached criticality
sources
en.wikipedia.org, encyclopaedia britannica, "chicago pile-1" (https://www.britannica.com/topic/chicago-pile-1); u.s. department of energy office of nuclear energy, "the history of nuclear energy" — both state chicago pile-1 went critical on december 2, 1942., encyclopaedia britannica, "chicago pile-1": the first human-made self-sustaining nuclear chain reaction was achieved on december 2, 1942, at the university of chicago., encyclopaedia britannica, 'chicago pile-1': first controlled, self-sustaining nuclear chain reaction achieved december 2, 1942, encyclopedia britannica, 'chicago pile-1'; u.s. department of energy office of nuclear energy history of chicago pile-1, u.s. department of energy office of nuclear energy history page and encyclopaedia britannica both state chicago pile-1 achieved the first controlled, self-sustaining nuclear chain reaction on december 2, 1942, at the university of chicago., u.s. department of energy, office of nuclear energy, "the history of nuclear energy" / argonne national laboratory history of chicago pile-1: the reaction occurred on december 2, 1942., u.s. department of energy, office of nuclear energy, "the history of nuclear energy" / atomic heritage foundation, "chicago pile-1" — both state chicago pile-1 achieved the first controlled, self-sustaining nuclear chain reaction on december 2, 1942., u.s. department of energy, office of nuclear energy: "celebrating 75 years of the world's first controlled nuclear chain reaction" (dec 1, 2017), states chicago pile-1 achieved criticality on december 2, 1942 at the university of chicago, wikipedia, "chicago pile-1": the reactor achieved criticality on december 2, 1942, at the university of chicago., wikipedia, "chicago pile-1": the reactor achieved the first human-made self-sustaining nuclear chain reaction on december 2, 1942, at the university of chicago., wikipedia, 'chicago pile-1' (https://en.wikipedia.org/wiki/chicago_pile-1): 'on december 2, 1942, the first human-made self-sustaining nuclear chain reaction was initiated in chicago pile-1 (cp-1)', wikipedia, 'chicago pile-1' - reactor achieved criticality on december 2, 1942, under the stands of stagg field, university of chicago, www.archives.gov, www.energy.gov, www.ne.anl.gov, www.osti.gov

Work

  1. Pinnedblocks 26,083,598 to 26,083,898 to on Ethereum mainnet
  2. Answered75 of 75 agreed70 needed
    #12991,942from en.wikipedia.org
    #8661,942from en.wikipedia.org
    #7151,942from en.wikipedia.org
    #4881,942from www.archives.gov
    #17251,942Encyclopaedia Britannica, 'Chicago Pile-1': first controlled, self-sustaining nuclear chain reaction achieved December 2, 1942
    70 more
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    attester
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    question hash
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