Problem 6a

Given information

The number of neutrons released per fission from on average is  

Step-by-step explanation

As we already know the effective multiplication factor (  ) is quite responsible for the feasibility of the chain reaction.

This means, that    , the multiplication factor for a multiplying system is less than . In that case, the number of neutrons decreases in time, and the chain reaction will never be self-sustaining. This condition is known as the subcritical state.