AFMC AFMC Solved Paper-2006

  • question_answer
    The operation of a nuclear reactor is said to be critical, if the multiplication factor (k) has a value:

    A) 1                                             

    B) 1.5

    C) 2.1                                         

    D) 2.5

    Correct Answer: A

    Solution :

    The multiplication factor \[(k)\] is an important reactor parameter and is the ratio of number of neutrons present at the beginning of a particular generation to the number present at the beginning of the next generation. It is a measure of the growth rate of the neutrons in the reactor. For k = 1, the operation of the reactor is said to be critical. Note: If k becomes greater than one, the reaction rate and the reactor power increase exponentially. Unless the factor k is brought down very close to unity, the reactor will become supercritical and can even explode.


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