Question

) A radioactive source contains two phosphorus radionuclides, 32P with T1/2 = 14.3 days, and 33P with T1/2 = 25.3 days. Initially, 10.0% of the decays are coming from 33P. How long must one wait until 90.0% to come from 33P? (b) Calculate the energy released from one atom undergoing the fission reaction: 235U + n ?141Cs + 93Rb + 2n. For this, use the following atomic and particle masses: 235U 235.04392 u; 141Cs 140.91963 u; 93Rb 92.92157 u; n 1.00866 u. (c) The power output from a 235U fission reactor is maintained at 350 MW. The reactor consumes half of its initially pure 235U fuel in 4.50 years. How much 235U fuel did it contain initially? Assume that the power station is 50% efficient in converting the fission energy of 235U to useful power output, and assume that this nuclide is consumed only by the fission process given in part (b).

Answer 1