Question

Find the number of neutrons generated per unit time in a uranium reactor whose thermal power is P = 100 MW if the average number of neutrons liberated in each nuclear splitting is v = 2.5. Each splitting is assumed to release an energy E = 200 MeV.

Answer 1

No. of fissions per unit time is clearly P/E. Hence no. of neutrons produced per unit time to vP/E. Substitution gives 7.80 x 10¹⁸ neutrons/sec.