Question

If the neutron reproduction factor K is
a) greater than 1 the fission is accelerated
b) less than 1 the fission reaction retards
c) equal to 1 the fission reaction is at steady state

• A. only a,b are true
• B. only b,c are true
• C. only a,c are true
• D. only a,b,c true

Answer 1

Answer: (D)

Reproduction factor $(K)$ : It is the ratio of number of neutrons in any particular generation to the number of neutrons in the preceeding generation.
So, if $K>1$ reaction is accelerated
if $K=1$ reaction is at steady state
if $K<1$ reaction retards.