Word Count : 435

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i) Prompt and Delayed Neutrons and Their Role in Reactor Safety Prompt Neutrons: Prompt neutrons are emitted immediately (within about 10⁻¹⁴ seconds) during the fission of a nucleus, such as (^{235}\text{U}) or (^{239}\text{Pu}). They account for approximately 99% of the total neutrons released per fission. These neutrons are responsible for sustaining the chain reaction in a nuclear reactor. Delayed Neutrons: Delayed neutrons are emitted by certain fission products (called precursors) some time after the fission event, ranging from milliseconds to several minutes. Though they constitute only about _______ _________ ___ ____ _______ _______ ________ _____ _____ ___ ____.
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