Question

Energy released in the fission of a single $92U^{235}$ nucleus is 200 MeV. The fission rate of a $92U^{235}$fuelled reactor operating at a power level of 5W is.

• A. $1.56 \times 10^{+ 10}s^{- 1}$
• B. $1.56 \times 10^{+ 11}s^{- 1}$
• C. $1.56 \times 10^{+ 16}s^{- 1}$
• D. $1.56 \times 10^{+ 17}s^{- 1}$

Answer 1

Answer: (B)

$1.56 \times 10^{+ 11}s^{- 1}$

Answer 2

$\frac{Energy}{Fission} = 200\mspace{6mu} MeV = 200 \times 10^{6} \times 1.6 \times 10^{- 19}J$

Fission rate $= \frac{5}{200\mspace{6mu} MeV} = 1.56 \times 10^{11}$fission/sec.