English Dictionary

prompt criticality

名詞

不可算名詞 通常

(nuclear physics) The point at which the prompt neutrons produced by a nuclear fission chain reaction are just sufficient to sustain the chain reaction on their own (the state of being prompt critical); past this point, changes in reaction power are controlled by changes in the prompt neutron flux, and occur on a timeframe of milliseconds, too rapidly to be controlled by mechanical means.

日本語の意味

核分裂連鎖反応において、反応中に発生する即時中性子のみで、反応が継続可能な臨界状態を指す。 / 即時中性子が十分に供給され、核分裂連鎖反応が自己持続する状態であり、反応パワーの急激な変動がミリ秒単位で発生する。

During the experiment, the reactor briefly reached prompt criticality, requiring immediate shutdown procedures.

実験中、原子炉は一時的に即発臨界に達し、直ちに停止手順が必要になった。

意味（1）

(nuclear physics) The point at which the prompt neutrons produced by a nuclear fission chain reaction are just sufficient to sustain the chain reaction on their own (the state of being prompt critical); past this point, changes in reaction power are controlled by changes in the prompt neutron flux, and occur on a timeframe of milliseconds, too rapidly to be controlled by mechanical means.

The system is thought to have approached prompt criticality, at which time the rate of power increase would have been determined by the neutron lifetime (on the order of milliseconds).

prompt criticalities （ plural ）