Question

The operation of a nuclear reactor is said to be critical if the multiplication factor $\left(K\right)$ has a value:

• A. $1$
• B. $1.5$
• C. $2.1$
• D. $2.5$

Answer 1

The correct option is A $1$

The operation of a nuclear reactor is said to be critical if the multiplication factor (K) has a value 1.
The multiplication factor is
$k=\frac{\text{rate of production of neutrons}}{\text{rate of loss of neutrons}}$
If $k>1$ explosion occurs.
If $k<1$ the chain reaction comes to half.